STMICROELECTRONICS E

TDA7514
SINGLE-CHIP FM/AM TUNER WITH STEREO DECODER
AND AUDIO PROCESSOR
1
FEATURES
■
AM/FM WORLD TUNER FOR CAR-RADIO
■
INTEGRATED IMAGE REJECTION FM MIXER
■
INTEGRATED TUNING PLL
■
VARIABLE-BANDWITH FM IF FILTER (ISS)
■
FULLY INTEGRATED FM STEREO
DECODER
■
FULLY INTEGRATED FM/AM NOISE
BLANKER
■
HIGHLY INTEGRATED AUDIO PROCESSOR
2
DESCRIPTION
The TDA7514 is a device for car-radio applications
that combines full RF front-end functions with advanced audio-processing capabilities.
As far as FM and AM functions are concerned, the
TDA7514 features front-end processing, including
the digital tuning PLL. IF processing with demodulation and variable-bandwidth IF filtering (ISS),
stop station and quality detection functions, FM
stereo decoding by means of a fully integrated adjustment-free dedicated PLL and, finally, AM and
FM noise blanking (AM noise blanking comprises
one IF NB as well as an audio NB).
The FM stereo decoder and the noise blanking
functions are realised entirely without external
components. The FM front-end circuit features an
image-rejection mixer that allows the simplification
of the external preselection filter, and a very low
noise level that allows getting rid of the external
preamplifier with no loss in sensitivity. A 6 bit on-
June 2005
Figure 1. Package
TQFP80
Table 1. Order Codes
Part Number
Package
E-TDA7514
TQFP80
E-TDA7514TR
TQFP80 in Tape & Reel
E- prefix indicates lead free package
board ADC makes a digitised version of the Smeter available to the µP via I2Cbus.
The audio processor section comprises input selectors for one stereo single-ended source, one
stereo quasi-differential source and a mono differential source. Volume, loudness, tone (bass and
treble), balance and fading controls are available
with completely pop-free operation to drive four
output channels. An additional input independently mixable on each of the four outputs is provided
for chime. A soft mute function and an RDS mute
function are included to handle source change as
well as RDS AF search without abrupt changes in
the audio level.
Most of the parameters in the front-end section are
I2Cbus-driven and therefore under the control of
the car-radio maker. The I2Cbus allows furthermore the user to realise the full electric alignment
of all the external coils.
Rev. 1
1/74
TDA7514
GND
Figure 2. Block Diagram
2/74
TDA7514
Table 2. Pin Description
N°
Pin
Function
1
VREF5V
5V reference
2
TUNGND
tuner general ground
3
AMMIX1IN+
am mix1 input
4
AMMIX1IN-
am mix1 input
5
AMAGC1TC
am agc1 filter capacitor
6
AMAGC1IOUT
am agc1 current output
7
AMAGC1VOUT
am agc1 voltage output
8
FMMIX1IN+
9
RFGND
10
FMMIX1IN-
fm mix1 input
11
FMAGCTC
fm agc detector time constant
12
FMAGCIOUT
13
GND
14
FMADJOUT
fm mix1 input
rf ground
fm agc current output
ground
fm antenna filter adjustment
15
VCOC
16
OSCGND
am/fm vco collector
17
VCOB
18
OSCVCC
19
LFOUT
PLL loop filter output
20
LFREF
PLL loop filter reference
21
LFINAM
PLL AM loop filter input
22
LFINFM
PLL FM loop filter input
23
LFHC
24
PLLGND
PLL back-end ground
25
PLLVCC
PLL back-end supply
26
XTALG
ref osc gate
27
XTALD
ref osc drain
28
DIGGND
digital ground
29
DIGVCC
digital dirty supply (8V)
30
QUALMPOUT/ISSBW
31
QUALACMPOUT
32
ISSTC
ISS time constant
33
DEVTC
deviation detector time constant
34
VREF3V
3V reference
35
APGND
audio processor/stereo decoderground
36
APVCC
audio processor/stereo decoder supply (8V)
37
OUTRR
audio out
38
OUTRL
audio out
39
OUTFR
audio out
40
OUTFL
audio out
vco ground
am/fm vco base
vco supply (8V)
PLL loop filter high-current input
multipath det output / ISS BW indicator
multipath det / adjacent channel det output
3/74
TDA7514
Table 2. Pin Description
N°
Pin
41
CHIMEIN
Function
chime input
42
ACRIN
43
ACROUT
44
ACLIN
45
ACLOUT
46
PH+
phone in +
47
PH-
phone in -
48
PB_L
tape in left
49
PB_R
tape in right
50
AUXR
audio aux in right
51
AUXCOM
52
AUXL
53
TUNERIN
54
TUNEROUT
ac coupling right input
ac coupling right output
ac coupling left input
ac coupling left output
audio aux in common
audio aux in left
am audio/fm mpx input
am audio/fm mpx output
55
AUDIOMUTE
56
SD / IFCOUT / ARSOUT
audio processor mute control
57
SDA
I2C bus data
58
SCL
I2C bus clock
59
SMETEROUT
60
DEMGND
61
AMIF2AMPIN
am/fm station detector output / IF counter output / ARS MPX output
filtered / unfiltered Smeter output
fm demodulator ground
am if2 amp input
62
SMETERTC
am/fm smeter filtering capacitor
63
FMDEMREF
fm demodulator reference capacitor
64
AMIF2AMPREF
am if2 amp feedback capacitor
65
SNCTC
66
AMAGC2TC
SNC detector time constant
67
AMMIX2OUT-
68
AMMIX2OUT+
69
FMMIX2IN-
fm mix2 input
70
FMMIX2IN+
fm mix2 input
71
FMIFAMP2OUT
72
FMIFAMP2IN
73
TUNVCC
74
FMIFAMPREF/AMIF2REF
75
FMIFAMP1OUT
76
FMIFAMP1IN/AMMIX2IN
77
IF1GND
am agc2 filter capacitor
am mix2 output
am mix2 output
fm if1 amp2 output
fm if1 amp2 input
tuner general supply (8V)
fm if1 amps reference capacitor/am if2 reference voltage
fm if1 amp1 output
fm if1 amp1 input/am mix2 in
if1 ground
78
MIX1OUT-
am/fm mix1 output
79
MIX1OUT+
am/fm mix1 output
80
IF1VCC
4/74
if1 supply (8V)
TDA7514
3
ELECTRICAL CHARACTERISTCS
3.1 FM
(Vcc = 8.5V; Tamb= 25°C; Vant,in= 60dBµload; fc=98.1MHz; fdev = 40kHz; fmod=1KHz; IF1amp1=25dB;
IF1amp2=15dB; Filter @TUNEROUT:IEC_TUNER+Deemphasis=50µs, unless otherwise specified)
Table 3.
Symbol
Parameter
Test Condition
Min
Typ
Max
Unit
General (measured at audioprocessor output with de-emphasis and high cut active, ISS set to 80 KHz BW)
US
SNR
LS
THD
Usable sensitivity
S/N=40dB
Signal to Noise ratio
0
dBµVload
65
dB
Limiting Sensitivity
-3dB_point, SoftMute Off
-2.5
dBµVload
Total Harmonic Distortion
fdev = 40kHz
0.26
%
fdev = 75kHz
0.36
%
Vout
Output Level
@TUNEROUT
243
mVrms
ISN
Interstation Noise
Delta Vout@RF OFF, Soft
Mute OFF
-8.5
dB
IFCS
IF Counter Sensitivity
0
dBµVload
Icctun
DC Supply Current@TUNVCC
80
mA
DC Supply Current@IFT1
5
mA
Iccif1
DC Supply Current@IF1VCC
10
mA
Iccosc
DC Supply Current@OSCVCC
10
mA
Iccpll
DC Supply Current@PLLVCC
3
mA
Iccdig
DC Supply Current@DIGVCC
7
mA
6
kΩ
2.3
V
Iccmix1
IQ Mixer 1
RIN
Input Resistance
Differential
VIN
Input DC Bias
@pin 8, pin 10
Gm
Transconductance
17
mS
IIP3
Input IP3
108
dBµV
IQG
IQ Gain Adjustment
-1
+1
%
IQP
IQ Phase Adjustment
-7
+8
°C
IRR
Image Rejection Ratio
Gvmix1
Gain
without adjustment
30
dB
adjusted
42
dB
from input (single-ended) to
IFT1 out differential
22
dB
Between MIX1OUT+ and
MIX1OUT-
2.3
pF
IFT1 Adjustment
Cift1min
IFT1 Adjustment Capacitor
Minimum
5/74
TDA7514
Table 3. (continued)
Symbol
Parameter
Test Condition
Min
Typ
Max
Unit
Cift1max
IFT1 Adjustment Capacitor
Maximum
Between MIX1OUT+ and
MIX1OUT-
20.1
pF
Cift1step
IFT1 Adjustment Capacitor
Step
Between MIX1OUT+ and
MIX1OUT-
1.3
pF
RFT Adjustment
Vrftadjmin
RFT Adjustment Minimum
@T6<0:7>=[00000000]
TVIN=3V
0.4
V
Vrftadjmax
RFT Adjustment Maximum
@ T6<0:7>=[11111111]
TVIN=3V
5.9
V
Vrftadjstep
RFT Adjustment Step
TVIN=3V,
VRFTadjstep=TVIN/128
23
mV
@ T6<0:7>=[11000001]
TVIN=3V
3
V
8.1
V
0.4
V
VRFT0
Voutmax
Output voltage maximum
Voutmin
Output voltage minimum
VCC-0.4
Wide Band RF AGC (input: FMMIXER1in+ and FMMIXER1IN-)
WAGCspL
Lower Threshold Start
(Set 1) (“min” not used)
Level at FMMIXER1IN+
@V12=100mV
IFT1 primary is shorted and is
connected to GND with 56nF
66.8
dBµV
WAGCspH
Higher Threshold Start
(Set max)
Level at FMMIX1IN+
@V12=100mV
IFT1 primary is shorted and is
connected to GND with 56nF
83.5
dBµV
Wide Band Keying AGC ( Controlled by FiltSMeter1ms )
WAGCK
Vkey
AGC Start (Set 1) shift
Shifted level of AGC Starting
point at FMMIX1IN+ when
VSMeter changes from Vkey
to Vkey-450mV
-12
dB
Vsmeter at Keyed AGC start
when V12 changes to 90mV
from 100mV (Set 1)
1.71
V
Narrow Band IF AGC (input: FMMIXEROUT+ and FMMIXER1OUT-)
NAGCspL
Lower Threshold Start (Set 1)
(“min” not used)
Level of IF1 at FMMIX1OUT+
@V12=100mV
90.2
dBµV
NAGCspH
Higher Threshold Start (Set
max)
Level of IF1 at FMMIX1OUT+
@V12=100mV
WAGC set to max
109
dBµV
RF AGC Pin Diode Driver Out
6/74
Ioutmin
Minimum
AGCOFF
Ioutmax
Maximum
AGCON; total
@330 Ω
@2.2K Ω
0.1
10.1
8.8
1.35
µA
mA
mA
mA
TDA7514
Table 3. (continued)
Symbol
Parameter
Test Condition
Min
Typ
Max
Unit
FMIF1AMP1 and FMIF1AMP2
Gv1min
AMP1 Minimum Gain
Source and load impedance:
330ohm.
19
dB
Gv1max
AMP1 Maximum Gain
Source and load impedance:
330ohm.
25
dB
AMP1 input-referred IP3
TBD
dBµV
Input Impedance of AMP1
330
Ω
Output Impedance of AMP1
330
Ω
IIP3a1
Rin1
Rout1
Gv2min
AMP2 Minimum Gain
Source and load impedance:
330ohm.
7
dB
Gv2max
AMP2 Maximum Gain
Source and load impedance:
330ohm.
15
dB
AMP2 input-referred IP3
TBD
dBµV
Input Impedance of AMP2
330
Ω
Output Impedance of AMP2
330
Ω
12.3
dB
330
Ω
TBD
dB
IIP3a2
Rin2
Rout2
FMMIXER2 (output not accessible)
Gvmix2
Gain (Single-ended output)
Rinmix2
Input Impedance
Source impedance: 330ohm.
FMLIMITER (450KHz) (output not accessible)
Gvlim
Gain (To Demod_IN from
FMMIXER2out+)
FM Filtered Smeter (Mod:off , Slider: 0)
VFSM1
Filtered Smeter1
@FMMIX2IN=50dBµV
1.44
V
VFSM2
Filtered Smeter2
@FMMIX2IN=70dBµV
2.47
V
VFSM3
Filtered Smeter3
@FMMIX2IN=90dBµV
3.96
V
FSMR1
Filtered Smeter resistor
T16<5>= 0
200
kΩ
FSMR2
Filtered Smeter resistor
T16<5>= 1
21
MΩ
CLVFSM
Clamped voltage
5
V
TCsm1
Time constant1
T16<5>= 0
10
ms
TCsm2
Time constant2
T16<5>= 1
0.9
s
38
mV
FM Smeter Slider
SLSTEP
Slider step
SLMAX
Maximum Slider
@VFSM=2.6V
1.16
V
SLMIN
Minimum Slider
@VFSM=2.6V
-1.18
V
450
kHz
ISS (Intelligent Selectivity System) Filter
Fcenter
Center Frequency
7/74
TDA7514
Table 3. (continued)
Symbol
Parameter
Test Condition
Min
Typ
Max
Unit
Fc120BW3
Fcenter=120KHz, @-3dB,BW
@ISS 120KHz
120
kHz
Fc120BW20
Fcenter=120KHz, @-20dB,BW
@ISS 120KHz
250
kHz
Fc80BW3
Fcenter=80KHz, @-3dB,BW
@ISS 80KHz
80
kHz
Fc80BW20
Fcenter=80KHz, @-20dB,BW
@ISS 80KHz
150
kHz
Fc20BW3
Fcenter=20KHz, @-3dB,BW
@ISS 20KHz
25
kHz
Fc20BW20
Fcenter=20KHz, @-20dB,BW
@ISS 20KHz
75
kHz
∆Fmin
Fcenter Fine adjust minimum
-20
kHz
ISS Filter Time Constant
Ichal1
Charge current low
@Weak adjacent
60
µA
Ichah1
Charge current high
@Weak adjacent
74
µA
Ichal2
Charge current low
@Strong adjacent
110
µA
Ichah2
Charge current high
@Strong adjacent
124
µA
Idischal
Discharge current low
1
µA
Idischahl
Discharge current high
15
µA
VISSTCL
ISSTC Low
0.1
V
VISSTCH
ISSTC High
4.9
V
ISS Filter Switch Threshold
V120on
Threshold for ISS120on
3
V
V120off
Threshold for ISS120off
1
V
V80on
Threshold for ISS80on
4
V
V80off
Threshold for ISS80off
2
V
Adjacent Channel detector for ISS (input: Smeter unfiltered)
FcenterAC1
Filter1 cutoff , T22<1:0>=00
HP(106KHz)+HP(100KHz)
130
kHz
FcenterAC2
Filter2 center, T22<1:0>=01
BP(100KHz)+HP(144KHz)
100
kHz
FcenterAC3
Filter3 center, T22<1:0>=10
BP(204KHz)+BP(100KHz)
177
kHz
FcenterAC4
Filter4 center, T22<1:0>=11
BP(100KHz)+BP(144KHz)
101
kHz
8/74
Gacmin
Gain minimum
23
dB
Gacmax
Gain maximum
29
dB
Vacl
Output voltage low
3.0
V
Vach
Output voltage high
4.9
V
Vthacl
Threshold for weak adjacent
low
3.25
V
Vthach
Threshold for weak adjacent
high
3.95
V
TDA7514
Table 3. (continued)
Symbol
Vthacstep
Parameter
Test Condition
Threshold for weak adjacent
step
Min
Typ
Max
Unit
100
mV
∆ACl
Differential Vthreshold between
weak and strong adjacent low
0
mV
∆ACh
Differential Vthreshold between
weak and strong adjacent high
300
mV
∆ACstep
Differential Vthreshold between
weak and strong step
100
mV
ACdesen1
Desens Th1
Vsmeter at starting desens
0.25
V
ACdesen2
Desens Th2
Vsmeter at starting desens
0.83
V
ACdesen3
Desens Th3
Vsmeter at starting desens
1.42
V
ACdesen4
Desens Th4
Vsmeter at starting desens
2.0
V
Slop1
∆AC/∆Vsmeter1
T22<6:5>=00
-2.7
Slop2
∆AC/∆Vsmeter2
T22<6:5>=01
-3.3
Slop3
∆AC/∆Vsmeter3
T22<6:5>=10
-5
Slop4
∆AC/∆Vsmeter4
T22<6:5>=11
-10
Multipath Channel detector for ISS ( input: Smeter unfiltered+Buffer)
FcenterMP
Qmp
BPF center
19
Quality factor of BPF
8.5
kHz
FiltGv1
Gain1 of BPF
T25<1:0>=00
-7
dB
FiltGv2
Gain2 of BPF
T25<1:0>=01
4
dB
FiltGv3
Gain3 of BPF
T25<1:0>=10
7
dB
FiltGv4
Gain4 of BPF
T25<1:0>=11
10
dB
Grect1
Rectifier Gain1
T25<3:2>=00
6
dB
Grect2
Rectifier Gain2
T25<3:2>=01
12
dB
Grect3
Rectifier Gain3
T25<3:2>=10
18
dB
Grect4
Rectifier Gain4
T25<3:2>=11
22
dB
Vmpl
Output voltage low
3.0
V
Vmph
Output voltage high
4.9
V
Vthmp1
Threshold level1
3.49
V
Vthmp2
Threshold level2
3.74
V
Vthmp3
Threshold level3
4.06
V
Vthmp4
Threshold level4
4.31
V
10
kHz
Deviation detector for ISS (input: Demodulator output)
FcDev
Cutoff Frequency of MPX LPF
(2nd order)
9/74
TDA7514
Table 3. (continued)
Symbol
Gvlpf
Parameter
Test Condition
Min
Typ
Max
Unit
Gain of LPF
14
dB
Idischarl
discharge current low at
DEVTC
6
µA
Idischarh
discharge current high at
DEVTC
20
µA
Idischarstep
discharge current step at
DEVTC
2
µA
Vth1
Low threshold1
15
kHzdev
Vth2
Low threshold2
20
kHzdev
Vth3
Low threshold3
28
kHzdev
Vth4
Low threshold4
44
kHzdev
Rdev1
Ratio of Vthreshold between
strong and high deviation
Vthhighdev/Vthdev
1
Rdev2
Ratio of Vthreshold between
strong and high deviation
Vthhighdev/Vthdev
1.3
Rdev3
Ratio of Vthreshold between
strong and high deviation
Vthhighdev/Vthdev
1.4
Rdev4
Ratio of Vthreshold between
strong and high deviation
Vthhighdev/Vthdev
1.5
DEVdesens1
Offset1 for Vsoftmute for
desens
referred to soft mute threshold
50
mV
DEVdesens2
Offset2 for Vsoftmute for
desens
referred to soft mute threshold
150
mV
Field Strength ISS ( FSISS )
∆Vthisissl
Low offset for Vthsm of
softmute by Smeter(1ms)
referred to soft mute threshold
-467
mV
∆Vthisissh
High offset for Vthsm of
softmute by Smeter(1ms)
referred to soft mute threshold
+467
mV
∆Vthisissstep
Step offset for Vthsm of
Softmute by Smeter(1ms)
67
mV
SoftMute by Smeter
Vthsm1
Threshold level1
T14<1:0>=00
0.3
V
Vthsm2
Threshold level2
T14<1:0>=01
0.4
V
Vthsm3
Threshold level3
T14<1:0>=10
1.6
V
Vthsm4
Threshold level4
T14<1:0>=11
1.8
V
Attsmmax
Maximum attenuation
21.5
dB
Attsmmin
Minimum attenuation
4.5
dB
Attsmstep
Step attenuation
2.5
dB
10/74
TDA7514
Table 3. (continued)
Symbol
Parameter
Test Condition
Min
Typ
Max
Unit
SoftMute by Adjacent Channel Detector
Vthsmac1
Threshold level1
T14<2>=0
2.75
V
Vthsmac2
Threshold level2
T14<2>=1
3.25
V
Attsmac1
Attenuation1
T14<7:6>=00
0
dB
Attsmac2
Attenuation2
T14<7:6>=01
6
dB
Attsmac3
Attenuation3
T14<7:6>=10
9
dB
Attsmac4
Attenuation4
T14<7:6>=11
12
dB
Station Detector by Smeter
VSDl
Low output level
@SDpin
0
V
VSDh
High output level
@SDpin
5
V
Vthsdmin
Threshold level minimum
T20<3:0>=0000
0.4
V
Vthsdmax
Threshold level maximum
T20<3:0>=1111
3.4
V
Vthsdstep
Threshold level step
0.2
V
Adjacent Channel Detector for Quality outputs, SNC and HCC
F1ac1
Cutoff or center frequency of
filter1
T8<4>=0
83
kHz
F1ac2
Cutoff or center frequency of
filter1
T8<4>=1
104
kHz
F2ac1
Cutoff or center frequency of
filter2
T8<5>=0
119
kHz
F2ac2
Cutoff or center frequency of
filter2
T8<5>=1
139
kHz
GcF2ac1
Gain of filter2
T18<7>=0
8.7
dB
GcF2ac2
Gain of filter2
T18<7>=1
14.7
dB
∆Vrect1
Offset1 of rectifier for
SNC&HCC
T18<5:4>=00
0.4
V
∆Vrect2
Offset2 of rectifier for
SNC&HCC
T18<5:4>=01
0.8
V
∆Vrect3
Offset3 of rectifier for
SNC&HCC
T18<5:4>=10
1.2
V
∆Vrect4
Offset4 of rectifier for
SNC&HCC
T18<5:4>=11
1.6
V
Multipath Detector for Quality output, SNC and HCC (Filter shared with ISS multipath detector)
Gvrectl
Rectifier Gain minimum
T15<7:5>=000
5
dB
Gvrecth
Rectifier Gain maximum
T15<7:5>=111
13.4
dB
1.2
dB
Gvrectstep
Rectifier Gain step
11/74
TDA7514
Table 3. (continued)
Symbol
Parameter
Test Condition
Min
Typ
Max
Unit
Smeter Control for SNC and HCC
Gvsml
Gain minimum
T15<3:0>=000
0
dB
Gvsmh
Gain maximum
T15<3:0>=111
2.25
dB
0.15
dB
Gvsmstep
Gain step
Quality_ACMPout (High output corresponds to good quality)
Gqacmp1mp
Gain output level1 for multipath T25<5:4>=01
-4
dB
Gqacmp2mp
Gain output level2 for multipath T25<5:4>=10
0
dB
Gqacmp3mp
Gain output level3 for multipath T25<5:4>=11
+4
dB
Gqacmp4mp
Gain output level4 for multipath T25<5:4>=00
-60
dB
Gqacmp1ac
Gain output level1 for adjacent
channel
T25<7:6>=01
-4
dB
Gqacmp2ac
Gain output level2 for adjacent
channel
T25<7:6>=10
0
dB
Gqacmp3ac
Gain output level3 for adjacent
channel
T25<7:6>=11
+4
dB
Gqacmp4ac
Gain output level4 for adjacent
channel
T25<7:6>=00
-60
dB
Vqacmpmax
Maximum output level
5.0
V
Vqacmpmin
Minimum output level
0
V
Quality_MPout (Low output corresponds to good quality)
Vqacmax
Maximum output level
5
V
Vqacmin
Minimum output level
0.9
V
Roll off compensation for TUNEROUT
∆Vc120
Delta voltage between ISS120
ON and ISS OFF
@53KHz
1
dB
∆Vc80
Delta voltage between ISS80
ON and ISS OFF
@53KHz
1
dB
23.5
dB
Weather Band Audio Gain Boost
Gvwbbst
12/74
Boosted gain
TDA7514
3.2 AM
(Vcc = 8.5V; Tamb = 25°C; Vsg = 74dBµVemf; fc = 999KHz; Modulation level = 30%, fmod = 400Hz;
80O+20pF/65pF dummy antenna; Filter@TUNEROUT: IEC_TUNER + Deemphasis = 50us, unless otherwise specified).
Table 4.
Symbol
Parameter
Test Condition
Min
Typ
Max
Unit
General (input level @SG emf)
US
Usable sensitivity
SNR=20dB
26
dBµVemf
50
dB
SNR
Signal to Noise Ratio
MS
Maximum Sensitivity
@∆Vout=-10dB, SoftMute:off
20
dBµVemf
THD1
Total Harmonic Distortion1
mod=30%, VSG=74 dBµVemf
0.1
%
THD2
Total Harmonic Distortion2
mod=80%, VSG=74 dBµVemf
0.2
%
THD3
Total Harmonic Distortion3
mod=30%,
VSG=120dBµVemf
0.2
%
THD4
Total Harmonic Distortion4
mod=80%,
VSG=120dBµVemf
0.5
%
THD @ Low frequency
mod=30%, fmod=100Hz
0.2
%
Vout
Level of TUNEROUT
TUNEROUT
370
mVrms
ISN
Interstation noise level
Vout @RF:off & SoftMute:off
-35
dB
IFCS
IF Counter Sensitivity
10
dBµVemf
Icctun
DC Supply Current@TUNVCC
85
mA
DC Supply Current@IFT1
5
mA
DC Supply Current@IF1VCC
10
mA
Iccmix2
DC Supply Current@IFT2
2
mA
Iccosc
DC Supply
Current@OSCVCC
8
mA
Iccpll
DC Supply Current@PLLVCC
5
mA
Iccdig
DC Supply Current@DIGVCC
10
mA
3.5
dB
1
KΩ
130
dBµV
THDLF
Iccmix1
Iccif1
MIXER1
Gv
Conversion gain
Rin
Input resistance (differential)　IIP3mix1
From AMMIXER1IN+ to
IFT1; secondary loaded with
330 Ω
Input-referred IP3
AGC1 Wide Band AGC (input: AMMIXER1in+ and AMMIXER1IN-; FEAGC in open-loop configuration)
WAGCspl
Starting point minimum
Level at AMMIX1IN+
@IAGCOUT = 1µA,
RF=999KHz, Set=0
94.4
dBµV
WAGCsph
Starting point maximum
Level at AMMIX1IN+
@IAGCOUT = 1µA,
RF=999KHz, Set=31
115.5
dBµV
13/74
TDA7514
Table 4. (continued)
Symbol
Parameter
Test Condition
Min
Typ
Max
Unit
AGC1 Narrow Band AGC (input: AMMIXER2in; FEAGC in open-loop configuration)
NAGCspl
Starting point minimum
Level at AMMIX2IN
@IAGCOUT = 1µA
IF1=10.7MHz, Set=0
96.3
dBµV
NAGCsph
Starting point maximum
Level at AMMIX2IN
@IAGCOUT = 1µA
IF1=10.7MHz, Set=31
117.0
dBµV
AGC1 Ultra Narrow Band AGC (input: AMIF2IN+; FEAGC in open-loop configuration)
UNAGCspl
Starting point minimum
Level at AMIF2IN
@IAGCOUT =1uA
IF2=450KHz, Set=0
69.6
dBµV
UNAGCsph
Starting point maximum
Level at AMIF2IN
@IAGCOUT =1uA
IF2=450KHz, Set=15
76.9
dBµV
Ioutl
Pindiode drive current
minimum
AGCOFF
Iouth
Pindiode drive current
maximum
AGCON
Voutl
Rfamp control voltage
minimum
AGCON
Vouth
Rfamp control voltage
maximum
AGCOFF
AGC1 Output
Ragcvout
Output resistance at VOUT
1
0.4
µA
mA
0.5
V
3.5
V
17
kΩ
AGC1 Time Constant
Ragc1tc1
Time constant FAST mode
Output resistance
AMAGC1TCpin
9
kΩ
Ragc1tc2
Time constant Normal mode
Output resistance
AMAGC1TCpin
100
kΩ
Gmix2max
Conversion Gain
From AMMIXER2in to IFT2
secondary loaded with 2k Ω
8
dB
IIP3mix2
Input-referred IP3
140
dBµV
Rmix2in
Input resistance
2.4
kΩ
AMMIXER2
AMIF2amplifier
Gif2ampmin
min. gain , no AGC2
T29<7:4>=0010
68
dB
Gif2ampmax
max. gain , no AGC2
T29<7:4>=1111
82
dB
-40
dB
2
kΩ
0.3
V
Δ Gif2amp
AGC2 range
Rif2ampin
Input resistance
SoftMute by Smeter
Vthsm1
14/74
Threshold level1
T14<1:0>=00
TDA7514
Table 4. (continued)
Symbol
Parameter
Test Condition
Min
Typ
Max
Unit
Vthsm2
Threshold level2
T14<1:0>=01
0.4
V
Vthsm3
Threshold level3
T14<1:0>=10
1.6
V
Vthsm4
Threshold level4
T14<1:0>=11
1.8
V
Attsmmax
Maximum attenuation
21.5
dB
Attsmmin
Minimum attenuation
4.5
dB
Attsmstep
Step attenuation
2.5
dB
AM Filtered Smeter
VFSM1
Filtered Smeter1
@AMIF2AMPIN=50dBµV
0.8
V
VFSM2
Filtered Smeter2
@AMIF2AMPIN=70dBµV
2.2
V
VFSM3
Filtered Smeter3
@AMIF2AMPIN=90dBµV
4.4
V
FSMR1
Filtered Smeter resistor
T16<5>=0
200
kΩ
FSMR2
Filtered Smeter resistor
T16<5>=1
21
MΩ
CLVFSM
Clamped voltage
5
V
TCsm1
Time constant1
T16<5>=0
10
ms
TCsm2
Time constant2
T16<5>=1
0.9
s
40
mV
AM Smeter Slider
SLSTEP
Slider step
SLMAX
Maximum Slider
@VFSM=2.6V
1.23
V
SLMIN
Minimum Slider
@VFSM=2.6V
-1.25
V
AM Station Detector by Smeter
VSDl
Low output level
@SD pin
0
V
VSDh
High output level
@SD pin
5
V
Vthsdmin
Threshold level minimum
T29<3:0>=0000
0.3
V
Vthsdmax
Threshold level maximum
T29<3:0>=1111
2.55
V
Vthsdstep
Threshold level step
0.15
V
AMAGC2 Time Constant
Ragc2tc1
Time constant FAST mode
Output resistance
AMAGC1TCpin
4.8
kΩ
Ragc2tc2
Time constant Normal mode
Output resistance
AMAGC1TCpin
150
kΩ
12
µsec
AMIFNB
Wgateifnb
Width of gate
Voffset0
Rectifier offset0
T31<3:0>=0000
0
mV
Voffset1
Rectifier offset1
T31<3:0>=0001
46
mV
Voffset2
Rectifier offset2
T31<3:0>=0010
100
mV
Voffset3
Rectifier offset3
T31<3:0>=0011
146
mV
15/74
TDA7514
Table 4. (continued)
Symbol
Parameter
Test Condition
Min
Typ
Max
Unit
Voffset4
Rectifier offset4
T31<3:0>=0100
212
mV
Voffset5
Rectifier offset5
T31<3:0>=0101
257
mV
Voffset6
Rectifier offset6
T31<3:0>=0110
312
mV
Voffset7
Rectifier offset7
T31<3:0>=0111
362
mV
Voffset8
Rectifier offset8
T31<3:0>=1000
439
mV
Voffset9
Rectifier offset9
T31<3:0>=1001
485
mV
Voffset10
Rectifier offset10
T31<3:0>=1010
541
mV
Voffset11
Rectifier offset11
T31<3:0>=1011
587
mV
Voffset12
Rectifier offset8
T31<3:0>=1100
653
mV
Voffset13
Rectifier offset9
T31<3:0>=1101
700
mV
Voffset14
Rectifier offset10
T31<3:0>=1110
755
mV
Voffset15
Rectifier offset11
T31<3:0>=1111
800
mV
Vdesens1
Desens threshold1
T31<5:4>=00
4.4
V
Vdesens2
Desens threshold2
T31<5:4>=01
2.65
V
Vdesens3
Desens threshold3
T31<5:4>=10
1.8
V
Vdesens4
Desens threshold4
T31<5:4>=11
1.4
V
3.3 VCO, PLL AND XTAL OSCILLATOR
Table 5.
Symbol
Parameter
Test Condition
Min
Typ
Max
Unit
VCO
Fvcomin
Minimum VCO frequency
VCC=8.5V
155
MHz
Fvcomax
Maximum VCO frequency
VCC=8.5V
280
MHz
Level of oscillation
@200MHz, ( RF=89.3MHz )
VCOB , Impedance of active
probe is 0.7pF//1MΩ
105
dBµV
0.05
V
Vosc
Loop Filter Output Voltage
Vlpoutmin
Minimum LPOUT
Vlpoutmax
Maximum LPOUT
VCC-0.05
8.45
V
Oscillation level
@XtalD , with 3pF between
XtalD and XtalG, Set to
11.25pF
123.5
dBµV
Xtal Oscillator
Vxtal
FXTALmax
Adjustment range maximum
+1.95
kHz
FXTALmin
Adjustment range minimum
-1.60
kHz
FXTALstep
Adjustment range step
124
Hz
16/74
TDA7514
3.4 STEREODECODER
Standard Conditions, unless otherwise indicated:
FM: Input at #TUNER_IN = 1 kHz at 450 mVrms, Input Gain setting = 0.5 dB, Deemphasis = 75 µs, Roll
Off Compensation set to give maximum stereo separation (note that this varies with VSBL setting)
AM: Input at #TUNER_IN = 1 kHz at 1 Vrms, Input Gain setting = 0.5 dB
Table 6.
Symbol
VIN
Rin
Gain
Gmax
GSTEP
Parameter
MPX Input Level
Test Condition
Input Gain = 3.5dB
Input Resistance (TUNERIN)
FM
AM
Min.
Typ.
0.5
Max.
1.25
Unit
VRMS
70
100
30
0.5
5.75
1.75
130
kΩ
kΩ
dB
dB
dB
30
35
50
55
0.02
91
0.3
80
%
dB
mV
Minimum Input Gain
Maximum Input Gain
Step Resolution
a
SVRR
Max Channel Separation
Supply Voltage Ripple
Vripple=100mV, f=1kHz
Rejection
THD
Total Harmonic Distortion
fin=1kHz, mono
S+N
Signal plus Noise to Noise
A-weighted, S=2Vrms
N
Ratio
MONO/STEREO SWITCH (With InGain=5.75dB)
Pilot Threshold Voltage
for Stereo, PTH=1
VPTHST1
dB
dB
10
15
25
VPTHST0
Pilot Threshold Voltage
for Stereo, PTH=0
15
25
35
mV
VPTHMO1
Pilot Threshold Voltage
for Mono, PTH=1
7
12
17
mV
VPTHMO0
Pilot Threshold Voltage
for Mono, PTH=0
10
19
25
mV
PLL
∆f/f
Capture Range
DEEMPHASIS & HIGHCUT
Deemphasis Time Constants
τDeempFM
FM; VLEVEL >> VHCH
τDeempAM
Deemphasis Time Constants
AM; VLEVEL >> VHCH
0.5
Deemphasis=50µs, FM
25
50
75
µs
Deemphasis=75µs, FM
Deemphasis=50µs, AM
50
75
22.3
100
µs
kHz
Deemphasis=75µs, AM
REF5V
Internal Reference Voltage
Carrier and Harmonic suppresion at output
α19
Pilot Signal
α38
Subcarrier
α57
Subcarrier
α76
Subcarrier
Intermodulation
α2
fmod=10kHz, fspur=1kHz
α3
fmod=13kHz, fspur=1kHz
%
4.7
f=19kHz, Deemphasis=75µs
f=38kHz, Deemphasis=75µs
f=57kHz, Deemphasis=75µs
f=76kHz, Deemphasis=75µs
Traffic Radio
α57
Signal
f = 57kHz
SCA – Subsidiary Communication Authorization
α67
Signal
f = 67kHz
ACI – Adjacent Channel Interference
α114
Signal
f = 114kHz
α190
Signal
f = 190kHz
40
14.9
5
5.3
kHz
V
50
75
62
90
dB
dB
dB
dB
65
75
dB
dB
70
dB
75
dB
95
84
dB
dB
17/74
TDA7514
3.4.1
NOTES TO THE CHARACTERISTICS
3.4.1.1 Intermodulation Suppression
V O ( signal ) ( at1kHz )
α2 = ----------------------------------------------------------------- ;
V O ( spurious ) ( at1kHz )
f s = ( 2 ⋅ 10kHz ) – 19kHz
V O ( signal ) ( at1kHz )
α3 = ----------------------------------------------------------------- ;
V O ( spurious ) ( at1kHz )
f s = ( 3.13 ⋅ kHz ) – 38kHz
measured with: 91% pilot signal; fm = 10kHz or 13kHz.
3.4.1.2 Traffic Radio (V.F.) Suppression
V O ( signal ) ( at1kHz )
·
α57 ( V WF ) = ------------------------------------------------------------------------------------------ ""
V O ( spurious ) ( at1kHz ± 23kHz )
measured with: 91% stereo signal; 9% pilot signal; fm=1kHz; 5% subcarrier (f=57kHz, fm=23Hz AM,
m=60%)
3.4.1.3 SCA ( Subsidiary Communications Authorization )
V O ( signal ) ( at1kHz )
α67 = ----------------------------------------------------------------- ;
V O ( spurious ) ( at1kHz )
f s = ( 2.38kHz ) – 67kHz
measured with: 81% mono signal; 9% pilot signal; fm=1kHz; 10%SCA - subcarrier ( fS = 67kHz, unmodulated ).
3.4.1.4 ACI ( Adjacent Channel Interference )
V O ( signal ) ( at1kHz )
α114 = ----------------------------------------------------------------- ;
V O ( spurious ) ( at1kHz )
f s = 110kHz – ( 3.38kHz )
V O ( signal ) ( at1kHz )
α190 = ----------------------------------------------------------------- ;
V O ( spurious ) ( at1kHz )
f s = 186kHz – ( 5.38kHz )
measured with: 90% mono signal; 9% pilot signal; fm=1kHz; 1% spurious signal ( fS = 110kHz or 186kHz,
unmodulated).
18/74
TDA7514
3.5 Noise Blanker
Table 7.
Symbol
Parameter
Test Condition
Min.
Typ.
Max.
Unit
BLTHL=PEAK+VBE+VPROG
Trigger Threshold 1)
meas.with VPEAK=0.9V,
InGain=5.75dB
VTR
111
30
mVOP
110
35
mVOP
101
40
mVOP
100
45
mVOP
011
50
mVOP
010
55
mVOP
001
60
mVOP
000
65
mVOP
00
260
mVOP
01
220
mVOP
10
180
mVOP
11
140
mVOP
BLTHH=PEAK+VBE+m*(PEAK-1.5V)+m*0.56V
VTRNOISE
VRECT
VRECTDEV
VRECTFS
TSFM
VRECTADJ
SRPEAK
noise controlled Trigger
Threshold meas.with
VPEAK=1.5V,
InGain=5.75dB
Rectifier Voltage with
InGain=5.75dB
Deviation dependent
Rectifier Voltage
with VMPX=500mVrms &
InGain=5.75dB
Fieldstrength controlled
Rectifier Voltage
meas.with VMPX=0mV,
VLEVEL<< VSBL (fully
mono)
Suppression Pulse
Duration FM Signal
HOLDN in Testmode
Noise rectifier discharge
(2) adjustment Signal
PEAK in Testmode
Noise rectifier (2) charge
Signal PEAK in Testmode
VMPX=0mV
0.5
0.9
1.3
V
VMPX=50mV, f=150kHz
1.5
1.7
2.1
V
VMPX=200mV, f=150kHz
2
2.5
2.9
V
11
0.9(off)
VOP
10
1.1
VOP
01
1.8
VOP
00
2.6
VOP
11
0.9(off)
V
10
1.1
V
01
1.5
V
00
2.8
V
00
38
µs
01
25.5
µs
10
32
µs
11
22
µs
00
inf.
W
01
56
MΩ
10
33
MΩ
11
18
MΩ
0
10
mV/µs
1
20
mV/µs
19/74
TDA7514
Table 7. (continued)
Symbol
VADJMP
Parameter
Noise rectifier adjustment
through Multipath (2)
Signal PEAK in Testmode
Test Condition
Min.
Typ.
Max.
Unit
00
0.3
V/ms
01
0.5
V/ms
10
0.7
V/ms
11
0.9
V/ms
128
µs
4
kHz
AM Noise Blanker
TD
AM delay time
fc
Corner frequency of AM
delay filter
AM configuration
Old mode (signal dependant
threshold)
Noise dependent threshold
New mode (fixed threshold),
STDInGain must be 0.5dB
140
%
AM Noise Detector High
Pass Frequency
0
10
kHz
20
kHz
AM Noise Detector High
Pass Filter Order
0
1 order
1
2nd
order
00
1.2
ms
01
800
µs
10
1.0
ms
11
640
µs
AM config
fcHP
TSAM
Notes:
Suppression Pulse
Duration AM Signal
HOLDN in Testmode
1
st
1. All thresholds are measured using a pulse with TR = 2 µs, THIGH= 2 µs and TF = 10 µs. The repetition rate must
not increase the PEAK voltage.
2. By design/characterization functionally guaranteed through dedicated test mode structure
Table 8. Quality Actuators
Symbol
Parameter
Test Condition
Min.
Typ.
Max.
Unit
Stereo Blend
VsbST
Vsb control voltage for full
stereo
VSBL
VSBL = 2V + (“d” factor) * 3V
see below
d
VSB Control Voltage for Full
Mono
d factor
20/74
5
V
000
29
%
001
33
%
010
38
%
011
42
%
100
46
%
101
50
%
110
54
%
111
58
%
TDA7514
Table 8. Quality Actuators (continued)
Symbol
Parameter
Blend Adjustment
Test Condition
Min.
Typ.
Max.
Unit
The filtered Smeter input to the SNC detector has variable gain and
offset. See SNC Detector specs.
High Cut Control
VHCH
VHCH = a * b * 4V
(level = Smeter * 1.0)
see below
a
VHCH Shift “a” factor
0001
97
%
0010
73
%
0100
50
%
1000
32
%
00
67
%
01
75
%
10
83
%
11
92
%
b
VHCL
VHCH “b” factor
VHC Control Voltage for FULL
Highcut Rolloff
for HCC control from level (where level = Smeter * 1.0):
VHCL = a * b * c * 4V
(or VHCL = c * VHCH)
for HCC control from SNC:
VHCL = 2V + a * b * c * 3V
c
fc range
HCC step
VHCL “c” factor
HCC Filter cutoff frequency
range
Number of settings (per
range)
00
16.70
%
01
22.20
%
10
27.80
%
11
33.30
%
00
20kHz
~
4kHz
01
10kHz
~
2kHz
10
4kHz
~
800Hz
11
4kHz
~
800Hz
32
21/74
TDA7514
Table 8. Quality Actuators (continued)
Symbol
ATTMAX/MIN
Parameter
Min.
Typ.
Max.
Unit
The maximum high cut attenuation can be selected via I2C [addr 8C, subaddr 23d, bits D2 to D1].
NOTES:
- The maximum high cut frequency setting can make the maximum attenuation lower than this. But then
you effectively have a fixed rolloff filter, because the max high cut frequency will keep the hcc filter
frequency from moving any higher, and the max high cut attenuation will keep the hcc filter frequency
from moving any lower.
- Also, there is an alternative way of setting the maximum high cut attenuation, but only if a maximum
high cut frequency does not need to be selected. The FAST3 can be set to limit the minimum high cut
frequency [addr 8C, subaddr 25d, bit D6], then any of the 32 high cut frequencies can be selected to
limit the max attenuation.
Max/Min high Cut
Attenuation(at 10kHz)@
HCC range 20kHz~4kHz
Max/Min high Cut
Attenuation(at 10kHz)@
HCC range 10kHz~2kHz
Fixed Rolloff
22/74
Test Condition
00
-1.8
dB
01
-4.4
dB
10
-6.2
dB
11
-7.0
dB
00
-5.6
dB
01
-9.3
dB
10
-11.5
dB
11
-12.4
dB
There are two ways to set the HCC filter to a fixed filter (there will be no
dynamic movement of the filter). Both of these will set the filter to the
corner frequency selected in the Max/Min High Cut Frequency [addr
8C, subaddr 25d, bits D4 to D0].
1) Set the FAST3 to Fixed High Cut ON [addr 8C, subaddr 25d, bit D7].
2) Turn High Cut OFF [addr 8C, subadress 23, bit D0] and Fix
Maximum High Cut Frequency [addr 8C, subaddr 25d, bit D6]
TDA7514
3.6 AUDIO PROCESSOR
(VS = 8.5V; Tamb= 25°C; RL= 10kΩ ; all gains = 0dB; f = 1kHz; unless otherwise specified)
Table 9.
Symbol
Parameter
Test Condition
Min.
Typ.
Max.
Unit
70
100
130
kΩ
INPUT SELECTOR
Rin
Input Resistance
VCL
Clipping level
SIN
Input Separation
GIN MIN
All single ended inputs
2
VRMS
80
100
dB
Min. Input Gain
-1
0
+1
dB
GIN MAX
Max. Input Gain
13
15
17
dB
GSTEP
Step Resolution
0.5
1
1.5
dB
Adjacent Gain Steps
-5
1
5
mV
GMIN to GMAX
-10
6
10
mV
VDC
Voffset
DC Steps
Remaining offset with AutoZero
0.5
mV
QUASI DIFFERENTIAL STEREO INPUT
Rin
GQD
Input Resistance
70
Gain
100
130
-4
Symbol
Parameter
CMRR
Common Mode Rejection Ratio
eNO
all inputs to ground
Output Noise @ Speaker
Outputs
Test Condition
kΩ
dB
Min.
Typ.
VCM=1 VRMS@ 1kHz
46
70
dB
VCM=1 VRMS@ 10kHz
46
60
dB
20
µV
20Hz-20kHz,flat;
all stages 0dB
Max.
Unit
SINGLE-ENDED STEREO INPUT
Rin
Input Resistance
GQD
Gain
eNO
Output Noise @ Speaker
Outputs
70
20Hz-20kHz,flat;
all stages 0dB
100
130
kΩ
0
dB
TBD
µV
DIFFERENTIAL MONO INPUT
Rin
GMD
CMRR
eNO
Input Resistance
Differential
40
Gain
Common Mode Rejection Ratio
Output Noise @ Speaker
Outputs
56
72
kΩ
-4
dB
VCM=1 VRMS@ 1kHz
40
70
dB
VCM=1 VRMS@ 10kHz
40
60
dB
20Hz-20kHz,flat;
all stages 0dB
TBD
µV
BEEP CONTROL
VRMS
Beep Level
all flat
TBD
mV
fBeep
Beep Frequency
fBeep1
500
Hz
fBeep2
1
kHz
fBeep1
2
kHz
fBeep2
3
kHz
23/74
TDA7514
Table 9. (continued)
LOUDNESS CONTROL
Symbol
Parameter
Test Condition
Min.
Typ.
Max.
Unit
AMAX
Max Attenuation
-21
-19
-17
dB
ASTEP
Step Resolution
0.5
1
1.5
dB
fPeakLPF
fPeakLPF
LPF Peak Frequency
HPF Peak Frequency
fP1
32.5
Hz
fP2
40
Hz
fP3
150
Hz
fP1
4
kHz
fP2
6
kHz
fP3
8
kHz
fP4
10
kHz
VOLUME CONTROL
GMAX
Max Gain
14
15
16
dB
AMAX
Max Attenuation
-83
-79
-75
dB
ASTEP
Step Resolution
0.5
1
1.5
dB
G = -20 to +15dB
2
dB
G = -79 to -20dB
4
dB
2
dB
EA
ET
VDC
Attenuation Set Error
Tracking Error
DC Steps
Adjacent Attenuation Steps
0.1
3
mV
From 0dB to GMIN
0.5
5
mV
SOFT MUTE
AMUTE
TD
Mute Attenuation
Delay Time
VTH Low
Low Threshold for SM Pin
VTH High
High Threshold for SM Pin
80
dB
T1
0.48
ms
T2
0.96
ms
T3
20.2
ms
T4
40.4
ms
1
2.5
V
V
BASS CONTROL
CRANGE
ASTEP
fc
QBASS
24/74
Control Range
±14
±15
±16
dB
Step Resolution
0.5
1
1.5
dB
fC1
54
60
66
Hz
fC2
72
80
88
Hz
fC3
90
100
110
Hz
fC4
117
130
143
Hz
Q1
0.9
1
1.1
Q2
1.1
1.25
1.4
Q3
1.3
1.5
1.7
Center Frequency
Quality Factor
TDA7514
Table 9. (continued)
Symbol
DCGAIN
Parameter
Bass-DC-Gain
Test Condition
Min.
Typ.
Max.
Q4
1.8
2
2.2
DC = off
-1
0
+1
±10
DC = on (shelving filter) @
gain = ±15 dB
Unit
dB
dB
TREBLE CONTROL
Clipping Level
±14
±15
±16
dB
Step Resolution
0.5
1
1.5
dB
fC1
8
10
12
kHz
fC2
10
12.5
15
kHz
fC3
12
15
18
kHz
fC4
14
17.5
21
kHz
Input Impedance
35
50
65
kΩ
GMAX
Max Gain
14
15
16
dB
AMAX
Max Attenuation
-83
-79
-75
dB
ASTEP
Step Resolution
0.5
1
1.5
dB
AMUTE
Mute Attenuation
80
90
CRANGE
ASTEP
fc
Center Frequency
SPEAKER ATTENUATORS
Rin
EE
VDC
Attenuation Set Error
DC Steps
Adjacent Attenuation Steps
0.1
dB
2
dB
5
mV
CHIME INPUT
G
Gain to speaker outputs
-19
dB
2
VRMS
AUDIO OUTPUTS
VCL
ROUT
Clipping level
d = 0.3%
1.8
Output impedance
RL
Output Load Resistance
CL
Output Load Capacitor
VAC
AC gain
VDC
DC Voltage Level
30
100
2
kΩ
10
4
3.8
W
4.0
nF
dB
4.2
V
GENERAL
eNO
Output Noise
BW=20Hz to 20 kHz all gain =
0dB
20
µV
S/N
Signal to Noise Ratio
all gain = 0dB flat; Vo=2VRMS
100
dB
Distortion
VIN=1VRMS; all stages 0dB
d
Sc
Channel Separation Left/Right
0.005
80
100
0.1
%
dB
25/74
TDA7514
4
I2C-BUS INTERFACE
The TDA7514 supports the I2C-Bus protocol. This protocol defines any device that sends data onto the
bus as a transmitter, and the receiving device as the receiver. The device that controls the transfer is a
master and device being controlled is the slave. The master will always initiate data transfer and provide
the clock to transmit or receive operations. The TDA7514 is always a slave.
4.1 Data Transition
Data transition on the SDA line must only occur when the clock SCL is LOW. SDA transitions while SCL
is HIGH will be interpreted as START or STOP condition.
4.2 Start Condition
A start condition is defined by a HIGH to LOW transition of the SDA line while SCL is at a stable HIGH
level. This "START" condition must precede any command and initiate a data transfer onto the bus. The
device continuously monitors the SDA and SCL lines for a valid START and will not response to any command if this condition has not been met.
4.3 Stop Condition
A STOP condition is defined by a LOW to HIGH transition of the SDA while the SCL line is at a stable
HIGH level. This condition terminates the communication between the devices and forces the bus interface of the device into the initial condition.
4.4 Acknowledge
Indicates a successful data transfer. The transmitter will release the bus after sending 8 bits of data. During the 9th clock cycle the receiver will pull the SDA line to LOW level to indicate it receive the eight bits
of data.
4.5 Data Transfer
During data transfer the device samples the SDA line on the leading edge of the SCL clock. Therefore, for
proper device operation the SDA line must be stable during the SCL LOW to HIGH transition.
4.6 Device Addressing
To start the communication between two devices, the bus master must initiate a start instruction sequence, followed by an eight bit word corresponding to the address of the device it is addressing.
The TDA7514 addresses are: C4 HEX (Section 1 write), C5 HEX (Section 1 read), 8C HEX (Section 2
write), 8D HEX (section 2 read).
The TDA7514 connected to the bus will compare its own hardwired addresses with the slave address being transmitted, after detecting a START condition.
After this comparison, the TDA7514 will generate an "acknowledge" on the SDA line and will do either a
read or a write operation according to the state of R/W bit.
4.7 Write Operation
Following a START condition the master sends a slave address word with the R/W bit set to "0". The device will generate an "acknowledge" after this first transmission and will wait for a second word (the subaddress field).
This 8-bit subaddress field provides an access to any of internal registers. Upon receipt of the word address the TDA7514 slave device will respond with an "acknowledge". At this time, all the following words
transmitted will be considered as Data. The internal subaddress can be automatically incremented, according to the status of the "Page Mode" bit (Subaddress byte S5).
26/74
TDA7514
4.8 Read Operation
If the master sends a slave address word with the R/W bit set to 1, the TDA7514 will transmit one 8-bit
data word (see the relevant tables in "Register Organization" section).
Figure 3. Frame example
Section 1
CHIP ADDRESS
SUBADDRESS
MSB
S
1
LSB
1
0
0
0
1
0
R/W
DATA1 to DATAn
MSB
ACK
0
LSB
0
I
S4 S3 S2 S1
S0
MSB
LSB
ACK
ACK
P
ACK
P
Section2
CHIP ADDRESS
SUBADDRESS
MSB
S
1
LSB
0
0
0
1
1
0
R/W
DATA1 to DATAn
MSB
ACK
0
LSB
0
I
S4 S3 S2 S1
S0
MSB
LSB
ACK
S = START
P = STOP
ACK = Acknowledge
I = Page Mode
Figure 4. Timing Diagram and Electrical Characteristics
tHIGH
tR
tLOW
tR
SCL
tSU-STA
tHD-DAT
tSUBTOP
tSD-DAT
tHD-STA
SDA IN
tAA
tDH
ttxt
SDA OUT
D95AU378
27/74
TDA7514
Table 10.
Symbol
Parameter
Test Condition
Min
Typ
Max
Unit
500
kHz
fSCL
SCL Clock Frequncy
100
tAA
SCL Low to SDA Data Valid
300
ns
tout
Time the Bus must be free for the
New Transmission
4.7
µs
Start Condition Host Time
4.0
µs
tLOW
Clock Low Period
4.7
µs
tHIGH
Clock High period
4.0
µs
tSU-SDA
Start Conditions Setup Time
4.7
µs
tHD-DAT
Data Imput Hold Time
0
µs
tSU-DAT
Data Input setup Time
4.7
µs
tSU-DAT
Data Input Setup Time
250
ns
tR
SDA & SCL Rise Time
250
µs
tF
SDA & SCL Full Time
tHD-STA
µs
Stop Condition Setup Time
4.7
µs
tDH
Data Out Time
300
ns
VIL
Input Low Voltage
VIH
Input High Voltage
ISU-STO
1
V
3
V
4.9 Register Organization
Table 11. Section 1 (Turner)ADDRESS
MSB
LSB
D7
D6
D5
D4
D3
D2
D1
D0
1
1
0
0
0
1
0
R/W
Table 12. SUBADDRESS
MSB
LSB
S7
S6
S5
X
X
autoincr
S4
S3
S2
S1
S0
subaddress
Table 13. READ MODE: ISS OUTPUTS)
MSB
LSB
S7
S6
S5
S4
S3
S2
S1
S0
DEV+
DEV
AC
FS
SSTOP
MP
BW
ON
28/74
TDA7514
Table 14. Address Organization (Tuner Section)
MSB
Subaddr.
LSB
D7
D6
0
STBY
Current
select
1
Lock
detenable
D5
D4
D3
D2
Low current
activation delay
D1
D0
Charge Pump Control and STBY
High current
Phase difference
threshold
AM/FM
Function
fref
VCOadj PLL Lock Detector,FM mode and
BYPASS clockenab tests
2
counter LSB
PLL Counter 1 (LSB)
3
counter MSB
PLL Counter 2 (MSB)
4
counter LSB
PLL Reference Counter 2 (LSB)
5
counter MSB
PLL Reference Counter 2 (MSB)
6
FM FE slope adiust
7
8
FM VCO div
Set BP/HPII
biquad
Set BP/
HPI
biquad
AM WAGC starting point
Set fc II
biquad
Set fc I
biquad
IF Counter Control 2 (central
frequency and sampling time)
tCENTER
10
counter LSB
11
IFC AM/FM
12
AMVCO div
SoftMute
to FM
deviation
WB gain
14
AdiCh full mute level
15
Qual. MultiPath detector rectifier
gain
FSmeter
Offset
16
Smeter
10ms/1s
Quality
AFcheck
17
ISS test
connect
18
Set Gain in
AdjCh II
biquad
Enable
seek
mode
19
Manual/
ENIFC
manual
SET 456
20
UNAGC threshold
Quad AdjCh Rectifier
offset
Quality
fast test
HCC
source
FMIFAMP2 gain
VCO adj
start
Soft mute thr
ISS AC desens slope
Quality Detection: FSmetr offset
and gain (SNC), Multipath
detector rectifier gain
FMIFAMP1 gain
PLL test MUXer
FM mix gain adj
FM IFAMP gains, ISScenter
frequency, Smeter/ISS test
connections
Qual AdjCh detector gain, seek
mode, Qual AdjCh Rectifier
offset, PLL test MUXer, 456KHz
VCO adjustment start
manual/ 456KHz VCO adjustment
auto
(manual mode)
FM Smeter Stop threshold
ISS AC desens
threshold
Soft Mute, adjacent channel mute
Quality Detection: AdjCh detector
Qual adjacent
gain and offset, HCC source,
channel dtctor rect.
Quality fast test mode, AF check
gain
mode: ISS filter test
Manual VCO frequency
Smeter test MUXer
FM KAGC FM NAGC
enable
thr MSB
AdjCh
mute thr
Fast AGC AM fast AGC1, AM NAGC OGFF,
on
AM UNAGC, WB audio gain
FSmeter Gain
iSS Smeter threshold
SEEK
NAGC off
FSmeter full mute level
Smet test
ISS center frequency
connect
21
AM NAGC threshold, AM VCO
divider
AM NAGC threshold
Not used
ISSfilter test
IF Counter Reference (LSB)
IF Counter Reference (MSB) and
IF Counter Mode Select
counter MSB
13
23
Quad adjch filter programming, IF
Counter Control1
∆f
FC enable
tSAMPLE
9
22
FM FE slope adjust
AM WAGC starting point, FM
VCO divider
Sd pin configuration
ISS AC filter mode
FM mix phase adj
FM Smeter stop threshold, ISS
Smeter Threshold
Smeter test MUXer, SD pin
configuration
Seek, ISS adjacent channel
detector
Fm mixer1 adjust, FM AGC
29/74
TDA7514
Table 14. Address Organization (Tuner Section) (continued)
MSB
Subaddr.
LSB
D7
D6
24
not used
25
QualityOut AC gain
26
FMNAGC threshold
LSD
27
not used
28
D5
D4
D3
Clksep
D2
D1
D0
XTAL adjustment
QualityOut MP gain
ISS MP rectifier gain
FMWAGC threshold
FM demod NB
XTAL adjustment, clock sep
ISS/Quality MP
filtergain
FM demod ref frequency divider
FM demod fine adjust
Test disable EXT WB
connect
enable
AMIF 2AMP gain
FM
demod
input
30
not used
31
AM Smeter Stop threshold
AM FAST ARS ISS
AGC2
indicator
WX
narrow
Sm &
IFT1 adjust
AMIFNB Smeter dis
threshold
not used
Multipath detector, Quality out
FMdemod ref frequency divider,
FM AGC
FM demod fine adjust, FM demod
noise blanker
Smeter sloder, External WB,
testing
Smeter Slider
29
Function
AMIFNB slow rect offset
AM stop station, AM IF 2
Amplifier Gain
IFT adjust, AM fast AGC2, ARS,
WB narrow Smeter/FC
AM IF NB
Table 15. SUBADDRESS 0: Change Pump Control
MSB
D7
LSB
D6
D5
D4
FUNCTION
D3
D2
D1
D0
0
0
0
0
High current = 0mA
0
0
0
1
High current = 0.5mA
0
0
1
0
High current = 1mA
0
0
1
1
High current = 1.5mA
1
1
1
1
High current = 7.5mA
0
0
Low current = 0µA
0
1
Low current = 50µA
1
0
Low current = 100µA
1
1
Low current = 150µA
Change cump current control
0
low current only
1
Automatic current control
Turner Stand-by
0
Turner StandBy OFF
1
Turner StandBy ON
30/74
TDA7514
Table 16. SUBADDRESS 1: PLL Lock detector, FM mode and test
MSB
D7
D6
D5
D4
D3
D2
D1
LSB
D0
0
1
0
1
0
1
0
0
1
1
0
0
1
1
0
1
0
1
0
1
0
1
0
1
FUNCTION
Charge Pump
VCO adjust lock Disable
VCO adjust lock Enable
fref BYPASS Disable
fref BYPASS Enable
Turner/pll Am/fm Mode
Select AM mode
Select FM mode
Lock Detector Control
PD phase difference threshold 10ns
PD phase difference threshold 20ns
PD phase difference threshold 30ns
PD phase difference threshold 40ns
Not valid
Activation delay 4x1/fREF
Activation delay 6x1/fREF
Activation delay 8x1/fREF
Lock Detector On/Off
Lock detector doesn’t control charge pump
Lock detector controls charge pump
Table 17. SUBADDRESS 2: PLL Counter 1 (LSB)
MSB
LSB
FUNCTION
D7
D6
D5
D4
D3
D2
D1
D0
0
0
0
0
0
0
0
0
LSB = 0
0
0
0
0
0
0
0
1
LSB = 1
0
0
0
0
0
0
1
0
LSB = 2
-
-
-
-
-
-
-
-
-
1
1
1
1
1
1
0
0
LSB = 252
1
1
1
1
1
1
0
1
LSB = 253
1
1
1
1
1
1
1
0
LSB = 254
1
1
1
1
1
1
1
1
LSB = 255
Table 18. SUBADDRESS 3: PLL Counter 2 (MSB)
MSB
D7
0
0
0
1
1
1
1
D6
0
0
0
1
1
1
1
D5
0
0
0
1
1
1
1
D4
0
0
0
1
1
1
1
D3
0
0
0
1
1
1
1
D2
0
0
0
1
1
1
1
D1
0
0
1
0
0
1
1
LSB
D0
0
1
0
0
1
0
1
FUNCTION
MSB = 0
MSB = 256
MSB = 512
MSB = 64768
MSB = 65024
MSB = 65280
MSB = 65536
Note: 1 Swallow mode:fVCO/fSYN = LSB + MSB + 32
31/74
TDA7514
Table 19. SUBADDRESS 4: PLL Reference Counter 1 (LSB)
MSB
LSB
FUNCTION
D7
D6
D5
D4
D3
D2
D1
D0
0
0
0
0
0
0
0
0
LSB = 0
0
0
0
0
0
0
0
1
LSB = 1
0
0
0
0
0
0
1
0
LSB = 2
-
-
-
-
-
-
-
-
-
1
1
1
1
1
1
0
0
LSB = 252
1
1
1
1
1
1
0
1
LSB = 253
1
1
1
1
1
1
1
0
LSB = 254
1
1
1
1
1
1
1
1
LSB = 255
Table 20. SUBADDRESS 5: PLL Reference Counter 2 (MSB)
MSB
LSB
FUNCTION
D7
D6
D5
D4
D3
D2
D1
D0
0
0
0
0
0
0
0
0
MSB = 0
0
0
0
0
0
0
0
1
MSB = 256
0
0
0
0
0
0
1
0
MSB = 512
-
-
-
-
-
-
-
-
-
1
1
1
1
1
1
0
0
MSB = 64768
1
1
1
1
1
1
0
1
MSB = 65024
1
1
1
1
1
1
1
0
MSB = 65280
1
1
1
1
1
1
1
1
MSB = 65536
Note: 1 fVCO/fSYN = LSB + MSB + 1
Table 21. SUBADDRESS 6: FM FE Adjustment Slope
MSB
LSB
FUNCTION
D7
D6
D5
D4
D3
D2
D1
D0
0
0
0
0
0
0
0
0
α = 0 (-100%)
0
0
0
0
0
0
0
1
α=1
-
-
-
-
-
-
-
-
-
1
1
1
1
1
1
1
1
α = 255 (+99%)
Adjusted voltage:
without diode connected: Vout = (α /128) Vt
32/74
TDA7514
Table 22. SUBADDRESS 7: AM WAGC Starting point, FM VCO divider
MSB
D7
LSB
D6
D5
D4
D3
D2
D1
FUNCTION
D0
AM Wide AGC Threshold
@AMMIX1in
@SG
0
0
0
0
0
88.0
88.0
0
0
0
0
1
90.7
90.7
0
0
0
1
0
92.7
92.7
0
0
0
1
1
94.4
94.4
0
0
1
0
0
95.5
95.5
0
0
1
0
1
96.6
96.6
0
0
1
1
0
97.6
97.6
0
0
1
1
1
98.4
98.4
0
1
0
0
0
99.2
99.2
0
1
0
0
1
99.9
99.9
0
1
0
1
0
100.6
100.6
0
1
0
1
1
101.2
101.2
0
1
1
0
0
101.7
101.7
0
1
1
0
1
102.2
102.2
0
1
1
1
0
102.7
102.7
0
1
1
1
1
103.1
103.1
1
0
0
0
0
103.6
103.6
1
0
0
0
1
104.0
104.0
1
0
0
1
0
104.4
104.4
1
0
0
1
1
104.8
104.8
1
0
1
0
0
105.1
105.1
1
0
1
0
1
105.5
105.5
1
0
1
1
0
105.8
105.8
1
0
1
1
1
106.1
106.1
1
1
0
0
0
106.4
106.4
1
1
0
0
1
106.7
106.7
1
1
0
1
1
106.9
106.9
1
1
0
1
0
107.2
107.2
1
1
1
0
0
107.5
107.5
1
1
1
0
1
107.7
107.7
1
1
1
1
0
107.9
107.9
1
1
1
1
1
108.1
108.1
FM VCO divider control
0
0
all off
0
1
divide by 2
1
0
divide by 3
1
1
divide by 3
0
phase (I) = -90° ≥ high side conversion
1
phase (I) = +90° ≥ low side conversion
33/74
TDA7514
Table 23. SUBADDRESS 8 : IF Counter Control 1 and AM S.S. Threshold
MSB
D7
D6
D5
D4
D2
D1
LSB
D0
0
0
0
0
1
1
1
1
0
0
1
1
0
0
1
1
0
1
0
1
0
1
0
1
-
-
-
-
-
-
-
-
-
-
-
-
D3
0
1
0
1
0
1
0
1
0
1
FUNCTION
IF Counter frequency window
Not valid
Not valid
Not valid
∆f = 6.25kHz (FM) 1kHz (AM UPC)
∆f = 12.5kHz (FM) 2kHz (AM UPC)
∆f = 25kHz (FM) 4kHz (AM UPC)
∆f = 50kHz (FM) 8kHz (AM UPC)
∆f = 100kHz (FM) 16kHz (AM UPC)
IF counter on/off
IF counter disable/stand by
IF counter enable
Adjacent Channel programming
Filter 1Fc = 80kHz
Filter 1Fc = 100kHz
Filter 2Fc = 110kHz
Filter 2Fc = 140kHz
Filter 1HP
Filter 1BP
Filter 2HP
Filter 2BP
Table 24. SUBADDRESS 9: If Counter Control 2
MSB
D7
D6
D5
-
-
-
-
-
-
0
0
0
0
1
1
1
1
0
0
1
1
0
0
1
1
0
1
0
1
0
1
0
1
34/74
D4
D3
D2
D1
LSB
D0
0
0
0
0
0
0
0
0
1
1
1
0
0
1
1
1
1
1
1
0
0
1
0
0
0
0
1
1
1
1
0
0
1
0
0
1
1
0
0
1
1
0
0
1
0
1
0
1
0
1
0
1
0
1
1
FUNCTION
FM antenna adj (proportional to Vtuning)
fcenter = 10.60625MHz (FM) 449KHz (AM)
fcenter = 10.61250MHz (FM) 449KHz (AM)
fcenter = 10.66875MHz (FM) 458KHz (AM)
fcenter = 10.67500MHz (FM) 459KHz (AM)
fcenter = 10.68125MHz (FM) 460KHz (AM)
fcenter = 10.68750MHz (FM) 461KHz (AM)
fcenter = 10.69375MHz (FM) 462KHz (AM)
fcenter = 10.70000MHz (FM) 463KHz (AM)
fcenter = 10.70625MHz (FM) 464KHz (AM)
fcenter = 10.71250MHz (FM) 465KHz (AM)
fcenter = 10.80000MHz (FM) 479KHz (AM)
IF counter time windiw
tsample = 20.48ms (FM) 128ms (AM)
tsample = 10.24ms (FM) 64ms (AM)
tsample = 5.12ms (FM) 32ms (AM)
tsample = 2.568ms (FM) 16ms (AM)
tsample = 1.28ms (FM) 8ms (AM)
tsample = 640µs (FM) 4ms (AM)
tsample = 320µs (FM) 2ms (AM)
tsample = 160µs (FM) 1ms (AM)
TDA7514
Table 25. SUBADDRESS 10: IF Counter Reference (LSB)
MSB
LSB
FUNCTION
D7
D6
D5
D4
D3
D2
D1
D0
0
0
0
0
0
0
0
0
LSB = 0
0
0
0
0
0
0
0
1
LSB = 1
0
0
0
0
0
0
1
0
LSB = 2
-
-
-
-
-
-
-
-
-
1
1
1
1
1
1
0
0
LSB = 252
1
1
1
1
1
1
0
1
LSB = 253
1
1
1
1
1
1
1
0
LSB = 254
1
1
1
1
1
1
1
1
LSB = 255
Table 26. SUBADDRESS 11: IF Counter Reference (MSB) and IF Counter Mode Select
MSB
D7
-
LSB
D6
-
FUNCTION
D5
D4
D3
D2
D1
D0
0
0
0
0
0
0
MSB = 0
0
0
0
0
0
1
MSB = 256
0
0
0
0
1
0
MSB = 512
-
-
-
-
-
-
-
1
1
1
1
0
1
MSB = 15616
1
1
1
1
1
0
MSB = 15872
1
1
1
1
1
1
MSB = 16128
IF Counter Mode
0
0
not valid
0
1
IF counter FM mode (10.7KHz)
1
0
IF counter AM mode (450KHz)
0
0
not valid
Note: 1 fOSC/fTIM = LSB + MSB + 1
35/74
TDA7514
Table 27. SUBADDRESS 12: AM NAGC , AM VCO Divider
MSB
D7
LSB
D6
D5
D4
D3
D2
D1
FUNCTION
D0
AM Narow band AGC Threshold
@AMMIX2in
@SG
0
0
0
0
0
79.9
77.9
0
0
0
0
1
82.4
80.4
0
0
0
1
0
84.2
82.2
0
0
0
1
1
85.7
83.7
0
0
1
0
0
86.5
84.5
0
0
1
0
1
87.7
85.7
0
0
1
1
0
88.6
86.6
0
0
1
1
1
89.5
87.5
0
1
0
0
0
90.1
88.1
0
1
0
0
1
91.0
89.0
0
1
0
1
0
91.6
89.6
0
1
0
1
1
92.1
90.1
0
1
1
0
0
92.6
90.6
0
1
1
0
1
93.1
91.1
0
1
1
1
0
93.6
91.6
0
1
1
1
1
94.0
92.0
1
0
0
0
0
94.5
92.5
1
0
0
0
1
94.8
92.8
1
0
0
1
0
95.2
93.2
1
0
0
1
1
95.5
93.5
1
0
1
0
0
96.0
94.0
1
0
1
0
1
96.2
94.2
1
0
1
1
0
96.9
94.9
1
0
1
1
1
97.2
95.2
1
1
0
0
0
97.5
95.5
1
1
0
0
1
98.0
96.0
1
1
0
1
1
98.5
96.5
1
1
0
1
0
98.8
96.8
1
1
1
0
0
99.1
97.1
1
1
1
0
1
99.4
97.4
1
1
1
1
0
99.7
97.7
1
1
1
1
1
100.0
98.0
FM Soft Mute to deviation threshold
0
1
50mV
150mV
AM VCO divider mode
0
0
divide by 10
0
1
divide by 8
1
0
divide by 6
1
1
divide by 4
36/74
TDA7514
Table 28. SUBADDRESS 13: AM Fast AGC1, AM Ultra NARROW BAND AGC, Weather Band Gain
MSB
D7
D6
D5
D4
D3
D2
LSB
D0
D1
0
1
0
1
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
FUNCTION
AM fast AGC1
off (R =100 Kohm)
on (R = 9 Kohm)
AM Narrow AGC disable
NAGC on
NAGC off
AM Ultra Narrow Band AGC Threshold
@ IF2AMPin
@ SG
76
67
86
77
92
83
90
81
75
66
85
76
88
79
78
69
74
65
83
74
90
81
79
70
73
64
82
73
87
78
77
68
Weather Band audio gain boost
boost off (std audio gain)
boost on (audio gain x 15 = +23.5 dB)
Table 29. SUBADDRESS 14: Soft Mute, Adjacent Channel Mute
MSB
D7
D6
D5
D4
D3
D2
D1
LSB
D0
0
0
1
1
0
1
0
1
0
1
0
1
0
0
1
1
0
1
0
1
0
1
0
1
FUNCTION
Soft mute start/stop point (FM, AM) (*)
VSmeterL=0,
VSmeterH=0.6
VSmeterH=0.6
VSmeterL=0.2,
VSmeterH=1.4
VSmeterL=0.5,
VSmeterH=1.4
VSmeterL=1.0,
Adjacent channel mute start/stop point (FM)
VAdjChH=4.5
VAdjChL=1,
VAdjChH=4.5
VAdjChL=2
Full soft mute level
-4dB
(step = -2.5dB)
-21.5dB
Full adjacent channel mute level
0dB
-6dB
-9dB
-12dB
(*) Cfr. byte 20 for dependancy of ISS Smeter threshold on byte 14 programming
37/74
TDA7514
Table 30. SUBADDRESS 15: Quality detection: gain and offset on FSmeter (SNC), multipath
detector rectifier gain
MSB
D7
D6
D5
D4
D3
D2
D1
LSB
D0
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
FUNCTION
FSmeter gain (SNC)
0 dB
(step = 0.15)
2.25 dB
FSmeter offset (SNC)
1.8 V
2.4 V
Multipath detector rectifier gain
5 dB
(step = 1.2dB)
+13.4 dB
Table 31. SUBADDRESS 16: Quality Detection: Adjacent channel detector, HCC source, Quality
fast test, Quality AF check, ISS filter test
MSB
D7
D6
D5
D4
D3
D2
0
1
0
1
0
1
0
1
0
1
0
1
38/74
D1
LSB
D0
0
0
1
1
0
1
0
1
FUNCTION
Qual adjacent channel detector rectifier gain
12 dB
17.3 dB
18.4 dB
20 dB
High cut control source
SNC
FSmeter
Quality filters fast test mode
Test mode off
Test mode on filt Smeter tau = 100 us
SNC filt internal 22 pF
Quality filters AF check freeze mode
AF check off
AF check on filt Smeter tau = 100 us
60ms/1s Smeter filt freeze
MPath filt for StBlend freeze
USN filt for StBlend/AdjChMute freeze
Smeter filter time constant
1s
10 ms
ISS filter test
ISS filter input
std
filter in connected to Smeter test MUXer
ISS filter clock enable
clock off (test mode)
clock on (std)
TDA7514
Table 32. SUBADDRESS 17: FM IF AMP Gain, ISS center frequency, Smeter / ISS test connections
MSB
D7
LSB
D6
D5
D4
D3
D2
D1
FUNCTION
D0
FM IF Amp1 gain
0
0
14 dB
0
1
18 dB
1
0
21.5 dB
1
1
not used
FM IF Amp2 gain (10.7 MHz) [byte<28>bit<6>=0]
0
0
(7 dB) not used
0
1
9 dB
1
0
11 dB
1
1
15 dB
FM IF Amp2 gain (450 kHz) [byte<28>bit<6>=1]
0
0
7 dB
0
1
7 dB
1
0
9 dB
1
1
not used
ISS filter center frequency
0
0
430 kHz
1
0
440 kHz
0
1
450 kHz
1
1
460 kHz
Unfiltered Smeter test connection
0
std
1
unfilt Smeter users connected to #ACinL
unfilt Smeter source disconnected form users
ISS test MUXer connection
0
std
1
ISS test MUXer (TMODE1) connected to #SMETERTC
Smeter filt (60ms/1s) R disconnected from #SMETERTC
39/74
TDA7514
Table 33. SUBADDRESS 18: PLL Test, 456KHz VCO Adjust Start, ISS MP Gain and SD OUT MODE
MSB
D7
LSB
D6
D5
D4
D3
D2
D1
FUNCTION
D0
PLL TEST "testdout1" (pin #LFHC)
0
0
0
no test
0
0
1
fref [ref freq divid out]
output, 3V
0
1
0
fsyn [VCO freq div out]
output, 3V
0
1
1
phi [VCO prescal out]
output, 3V
1
0
0
psm [prescal reset]
output, 3V
1
0
1
phi
input, 3/5V
1
1
0
fsyn
input, 3/5V
1
1
1
sstop (cntres), fsyn
input, 3/5V
PLL TEST "sstop" (pin #SD)
(byte<21>bit<10>=01
0
0
0
no test
output, 3V
0
0
1
ifref
output, 3V
0
1
0
zeroone
output, 3V
0
1
1
stim
output, 3V
1
0
0
ifcout
output, 3V
1
0
1
fsyn
output, 3V
1
1
0
ltst (lock det test)
output, 3V
1
1
1
inlock
output, 3V
456 kHz self-adjustment state machine
0
if byte<19>bit<0>=0 and byte<1>bit<0>=0
0
Waiting
1
START
Adjacent Channel detector rectifier offset
0
0
0.39 V
0
1
0.78 V
1
0
1.14 V
1
1
1.49 V
Quality Seek Mode
0
fs
1
Enable seek mode
AdjCh detector filter gain
0
Filter 2 Gain = 8.5 dB
1
Filter 2 Gain = 14.5 dB
40/74
TDA7514
Table 34. SUBADDRESS 19: 456KHz VCO Adjustment (manual mode)
MSB
D7
LSB
D6
D5
D4
D3
D2
D1
FUNCTION
D0
0
OFF
Enable IFC (I2CBUS)
1
ON
0
Enable 456KHz VCO adj procedure (I2CBUS)
1
OFF
ON
0
0
0
0
0
1
0
0
0
0
-
-
-
-
-
1
1
1
1
0
0
0
0
0
1
-
-
-
-
-
0
1
1
1
1
1
1
1
1
1
VCO 456KHz frequency adjust
(I2
CBUS)
minfreq
maxfreq
VCO 456KHz frequency adjust mode
0
Manual adjustment procedure (I2CBUS)
1
Automatic adjustment procedure (State Machine)
Table 35. SUBADDRESS 20 : FM Smeter stop threshold, ISS Smeter threshold.
MSB
D7
LSB
D6
D5
D4
D3
D2
D1
FUNCTION
D0
FM Smeter Stop Station threshold
0
0
0
0
400 mV
-
-
-
-
step 200 mV
1
1
1
1
3400 mV
FM ISS Smeter threshold (∆ from Softmute thresh. (*)).
0
0
0
0
0 mV
-
-
-
-
step 67 mV
0
1
1
1
467 mV
1
0
0
0
0 mV
-
-
-
-
-
1
1
1
1
-467 mV
(*) Threshold is programmed by byte 14 bits<1:0> according to the following table:
Table 36. SUBADDRESS 14: Soft Mute
MSB
D7
LSB
D6
D5
D4
D3
D2
D1
FUNCTION
D0
Soft mute threshold
0
0
0.3V
0
1
0.4V
1
0
1.6V
1
1
1.8V
41/74
TDA7514
Table 37. SUBADDRESS 21 : SD pin configuration, Smeter test MUXer
MSB
D7
LSB
D6
D5
D4
D3
D2
FUNCTION
D1
D0
0
0
IFC AND FS Stop Station (output)
0
1
IFC (output)
1
0
FS Stop Station (output)
1
1
test (tristate)
pin #SD used as:
SD pin configuration
output from ISS AC det
output from ISS MP detinput to
ISS AC driver
input to ISS MP driver
SMETER TEST MUXER
0
0
0
0
0
0
test off
0
0
0
0
0
1
AM AGC1W OFFSET
0
0
0
0
1
0
AMAGC1N OFFSET
0
0
0
0
1
1
AM AGC1UN OFFSET
0
0
0
1
0
0
FM MULTIPATH PEAK
0
0
0
1
0
1
FM SD THR
0
0
0
1
1
0
AM IF2AMP OUT
0
0
0
1
1
1
AM SD THR
0
0
1
0
0
0
FM W/KAGC OUT
0
0
1
0
0
1
not used
0
0
1
0
1
0
FM DEMODADJ OUT
0
0
1
0
1
1
FM DEMODADJMUTE OUT
0
0
1
1
0
0
INLOCK
0
0
1
1
0
1
FM SMETERISSON THR
0
0
1
1
1
0
FM SMETERISSON BIT
0
0
1
1
1
1
FM ISSFILTER INPUT (OUT) [if byte<16>bit<6>=1]
0
1
0
0
0
0
456KVCOADJ SET456 BIT
0
1
0
0
0
1
456KVCOADJ ENIFC BIT
0
1
0
0
1
0
456KVCOADJ CHECK BIT
0
1
0
0
1
1
456KVCOADJ Q21 BIT
0
1
0
1
0
0
FM SMETERUNFILTERED
0
1
0
1
0
1
QUAL SMETERX1
0
1
0
1
1
0
QUAL SMETER1ms
0
1
0
1
1
1
QUAL USN
0
1
1
0
0
0
STD NOISE
0
1
1
0
0
1
FM ADJCHMUTE REF
0
1
1
0
1
0
FM SOFMUTE REF
0
1
1
0
1
1
AM IFNBSMETERtoSD COMMAND [must put SD in tristate]
0
1
1
1
0
0
AM IFNB FASTRECT OUT
0
1
1
1
0
1
AM IFNB SLOWRECT OUT
0
1
1
1
1
0
AM IFNB BLANK PULSE
0
1
1
1
1
1
AM IFNB SMETDESENS THR
1
0
0
0
0
0
FM NAGC OUT
42/74
TDA7514
Table 38. SUBADDRESS 22: Seek, ISS Adjacent Channel Detector
MSB
D7
D6
D5
D4
D3
D2
D1
0
0
1
1
LSB
D0
ISS adjacent channel detect. filter shape
Filt1
Filt2
Fo
Q
HP
HP
130
2.3
BP
HP
100
7.7
BP
BP
177
2.0
BP
BP
100
8.4
ISS adjacent channel detect. filter gain
23 dB
29 dB
ISS adjacent channel detect. filter desens
threshold at weak field strength
0.25 V
0.8 V
1.3 V
1.8 V
ISS adjacent channel detect. filter desens
slope at weak field strength
min
max
Seek
FM
AM AGC2 tau
Seek OFF Seek ON ISS disable short
0
1
0
1
0
1
0
0
1
1
0
0
1
1
FUNCTION
0
1
0
1
0
1
0
1
0
1
Table 39. SUBADDRESS 23: FM mixer1 adjust, FM AGC
MSB
D7
D6
D5
D4
D3
D2
D1
LSB
D0
0
0
0
0
1
1
1
0
0
0
1
0
0
1
0
0
1
1
0
0
1
0
1
0
1
0
1
1
FUNCTION
FM mixer1 phase adjust.
0
0
1
1
x
0
1
0
1
0
1
-7°
-6°
-5°
0°
+1°
+2°
+8°
FM mixer1 gain adjust.
0%
-1%
1%
0%
FM NAGC threshold MSB (LSB in byte 26)
FM AGC topology
NAGC on, KAGC off
NAGC off, KAGC on
43/74
TDA7514
Table 40. SUBADDRESS 24: XTAL adjustment, clock sep
MSB
D7
LSB
D6
D5
D4
D3
D2
D1
FUNCTION
D0
XTAL ajustment
capacitors from XTALG to gnd from XTALD to gnd
0
0
0
0
0
0 pF
0 pF
0
0
0
0
1
1.25 pF
1.25 pF
0
0
0
1
0
2.5 pF
2.5 pF
0
0
1
0
0
5 pF
5 pF
0
1
0
0
0
10 pF
10 pF
1
0
0
0
0
20 pF
20 pF
1
1
1
1
1
38.75 pF
38.75 pF
XTAL test
0
std xtal clock
1
clocksep (test on)
Table 41. SUBADDRESS 25 : Multipath DETECTOR, QUALITY OUT
MSB
D7
LSB
D6
D5
D4
D3
D2
D1
FUNCTION
D0
ISS/quality MPath det. filter gain
0
0
-7.2 dB
0
1
4.3 dB
1
0
6.5 dB
1
1
10.4 dB
ISS MPath det. rectifier gain
0
0
6 dB
1
0
12 dB
0
1
18 dB
1
1
21.5 dB
Quality out MPath gain
0
0
off
0
1
-4 dB
1
0
0 dB
1
1
+4 dB
Quality out AdjChann gain
0
0
off
0
1
-4 dB
1
0
0 dB
1
1
+4 dB
44/74
TDA7514
Table 42. SUBADDRESS 26: FM Demod Ref Frequency Test, FM AGC
MSB
D7
LSB
D6
D5
D4
D3
FUNCTION
D2
D1
D0
0
0
0
640.6 kHz
0
0
1
602.9 kHz
0
1
0
569.4 kHz
0
1
1
539.5 kHz
1
0
0
512.5 kHz
1
0
1
488.1 kHz
1
1
0
465.9 kHz (std)
1
1
1
445.7 kHz
FM demod ref frequency divider
FM WAGC starting point
0
0
0
mininum s.p.
-
-
-
-
0
1
0
std
-
-
-
-
1
1
1
maximum s.p.
FM NAGC starting point LSB (MSB is bit 6 byte 23)
0
0
minimum s.p. (with MSB = 0)
-
-
-
1
0
std (with MSB = 0)
0
0
(with MSB = 1)
-
-
-
1
1
maximum s.p. (with MSB = 1)
Table 43. SUBADDRESS 27: FM Demodulator Fine Adjust , FM Demodulator Noise Blanker
MSB
D7
LSB
D6
D5
FUNCTION
D4
D3
D2
D1
D0
0
0
0
0
0
+0 uA
0
0
0
0
1
+0.167 µA
FM audio demodulator current adjust
-
-
-
-
-
-
0
1
1
1
1
+2.51 µA
1
0
0
0
0
-0 µA
1
0
0
0
1
-0.167 µA
1
-
-
-
-
-
1
1
1
1
1
-2.51 µA
FM Demodulator Noise Blanker
0
0
NB off
0
1
setting 1
1
0
setting 2
1
1
setting 3
45/74
TDA7514
Table 44. SUBADDRESS 28 : Smeter slider, External WB, testing
MSB
D7
D6
D5
D4
D3
D2
D1
LSB
D0
0
0
0
1
1
1
0
0
1
0
0
1
0
0
1
0
0
1
0
0
1
0
0
1
0
0
1
0
0
1
0
1
1
0
1
1
0
1
0
1
FUNCTION
Smeter slider FM
AM
0 mV
0 mV
+46 mV
+39 mV
+1420 mV
+1215 mV
0 mV
0 mV
-46 mV
-39 mV
-1420 mV
-1215 mV
External WB filter on
std FM (no ext. WB filter)
external WB filter enabled; must also program
ISS on APSDlatch 23 bit 1 = 1
FM demod Vout test
std
test; disconnect FM demod Vout from users
Table 45. SUBADDRESS 29: AM stop station, AM IF 2 Amplifier Gain
MSB
D7
LSB
D6
D5
D4
FUNCTION
D3
D2
D1
D0
0
0
0
0
300 mV
0
0
0
1
450 mV
0
0
1
0
600 mV
-
-
-
-
1
1
1
1
AM Stop Station threshold
2550 mV
AM IF AMP Gain (AM mode)
[dB]
FM demodulator input
connection (bit 5)
450 kHz limiter
0
0
0
0
Not used (31.1)
0
0
1
0
67.6
stereo dec. 456 kHz VCO (test)
0
1
0
0
70.6
450 kHz limiter
0
1
1
0
74.7
stereo dec. 456 kHz VCO (test)
1
0
0
0
72.2
…
1
0
1
0
75.6
…
1
1
0
0
76.9
…
1
1
1
0
78.8
…
0
0
0
1
75.3
…
0
0
1
1
77.7
…
0
1
0
1
78.7
…
0
1
1
1
80.2
…
1
0
0
1
79.3
…
1
0
1
1
80.7
…
1
1
0
1
81.3
…
1
1
1
1
82.3
…
46/74
TDA7514
Table 46. SUBADDRESS 30: IFT Adjust, AM Fast AGC2, ARS, WB Narrow Smeter/IFC
MSB
D7
LSB
D6
D5
D4
FUNCTION
D3
D2
D1
D0
0
0
0
0
0
0
0
1
0.55 pF
-
-
-
-
-
0
1
1
1
7.7 pF
1
1
1
1
8.25 pF
IFT1 Adjust
0 pF
WX narrow
SM&IFC
0
off
1
on
ARS - ISS indicator
0
off
1
on
AM fast AGC2 enable
0
off
1
on -> (if Vaudio-Vref > 1.5 V then fast on)
Table 47. SUBADDRESS 31 : AM IF NB
MSB
D7
LSB
D6
D5
D4
FUNCTION
D3
D2
D1
D0
0
0
0
0
0 mV
0
0
0
1
46 mV
0
0
1
0
100 mV
0
0
1
1
146 mV
0
1
0
0
212 mV
0
1
0
1
257 mV
0
1
1
0
312 mV
0
1
1
1
362 mV
1
0
0
0
439 mV
1
0
0
1
485 mV
1
0
1
0
541 mV
1
0
1
1
587 mV
1
1
0
0
653 mV
1
1
0
1
700 mV
1
1
1
0
755 mV
1
1
1
1
800 mV
AM IF NB threshold
AM IF NB disable threshold
0
0
4.4 V
0
1
2.2 V
1
0
0.5 V
1
1
OFF
47/74
TDA7514
4.10 Section 2 (Stereodecoder, Audioprocessor + Tuner)Section 1 (Turner)
Table 48. ADDRESS
MSB
LSB
D7
D6
D5
D4
D3
D2
D1
D0
1
0
0
0
1
1
0
R/W
Table 49. SUBADDRESS
MSB
LSB
S7
S6
S5
testcon
azhold
autoincr
S4
S3
S2
S1
S0
subaddress
4.11 READ MODE: ISS OUTPUT
MSB
LSB
S7
S6
S5
S4
S3
S2
SMETER ADC
S1
S0
STEREO
SMON
Table 50. AUDIO PROCESSOR / STEREO DECODER - RELATED BYTES
MSB
Subaddr.
D7
0
loudness
gain
correctionl
1
soft step
LSB
D6
D5
D4
D3
D2
input gain
D1
Function
D0
source selector
volume steps
Source selector,
Volume
2
soft step
loudness gain pass
corner frequency
3
speaker
coupling
treble center
frequency
treble steps
4
soft step
bass quality factor
bass steps
5
soft step
Speaker steps
Speaker Left Front
6
soft step
Speaker steps
Speaker LRight Front
7
soft step
Speaker steps
Speaker Left Rear
8
soft step
9
rear seat
audio on
bass center
frequency
rear seat audio selector
loudness
freq. resp.
11
beep frequency
AZ on
12
13
MP infl. on
NB enable
48/74
loudness
Treble
Bass
Speaker steps
bass DC
cut
10
de-emph
time
constant
loudness steps
pilot
threshold
NB peak
charge
cur
NB dis.
NB AM
from MP
HPF order
(test)
mute (*)
soft step time
Speaker Right Rear
soft mute time
loudness low pass
corner frequency
chime dis
RR
LR
force
mono
NB AM fix
threshold
NB AM
HPF
corner
RF
LF
Std In Gain
roll-off compensation
mute (*)
Configuration Audio Processor 1
loudness Configuration Audio Processor II
treble
boost
mute (*)
Configuration Audio Processor III
mute (*) Stereo decoder II, NB II
Stereo decoder III, NB IV
TDA7514
Table 50. AUDIO PROCESSOR / STEREO DECODER - RELATED BYTES
MSB
Subaddr.
14
LSB
D7
D6
D5
NB overdev-contr thr.
15
D4
NB on
NB time
D3
D2
NB noise-contr. thr.
MP infl. on NB
16
Strong MP
infl. on NB
enable
17
AM/FM
for STD
18
HC fixed
HC
min/max
19
AP test on
VCO on
VHCL
HC from
SNC/lev
ADC on
D1
D0
NB low threshold
VHCH shift
VHCH
max HC
NB level-contr. thr.
NB Smeter
thresholds
AM
7.2kHz
LPF
NB III
Stereo decoder III, NB IV
HCenable Stereo decoder IV, NB V
STD in
switch
HC corner freq.
Std test muxer
Function
AM/FM mode selection, Stereo
decoder V, NB VI
Stereo decoder VI
ext. clock Std teston APSD test
TUNER-RELATED BYTES
20
"ac+" - "ac"
thresholds
difference
21
ISS MP
defeat AC
not used
22
not used
dev+/dev thresholds
ratio
23
not used
not used
24
"ac" threshold
not used
not used
ISS MP threshold
"dev" threshold
not used
MP/AC test switch
ISS MP ISS: Multipath detector
ctrl on
peak detector discharge current ISS: Deviation detector
ISS
80/120
ISS time constant
ISS
20KHz on ISS: Adjacent Channel detector
ISS ON
ISS test multiplexing
ISS
enable
ISS Filter
ISS test
25
ISS filter control matrix
ISS filter control matrix
26
ISS filter control matrix
ISS filter control matrix
27
not used
not used
not used
28
not used
not used
not used
ISS filter control matrix
HC range
VSBL
ISS filter control matrix
VSBL generation, HC range
Table 51. SUBADDRESS 0: Input selector
MSB
D7
D6
0
0
1
1
0
1
D5
0
0
1
1
D4
0
0
1
1
D3
0
1
0
1
D2
D1
LSB
D0
0
0
0
0
1
1
1
1
0
0
1
1
0
0
1
1
0
1
0
1
0
1
0
1
FUNCTION
Source Selector
Quasi differential input
Mono differential input
Single ended input
Turner
Turner
internal beep
mute
not allowed
Input Gain
0dB
1dB
14dB
15dB
Loudness filter gain correction
higher gain
lower gain
49/74
TDA7514
Table 52. Subaddress 1,4,5,6,7: Volume Spkr atten. LF, RF, LR, RR
MSB
D7
LSB
FUNCTION
D6
D5
D4
D3
D2
D1
D0
0
0
0
1
1
1
1
15dB
Gain/Attenuation
-
-
-
-
-
-
-
-
0
0
0
0
0
0
1
1dB
0
0
0
0
0
0
0
0dB
0
0
1
0
0
0
0
0dB
0
0
1
0
0
0
1
-1dB
-
-
-
-
-
-
-
-
0
1
0
0
0
0
0
-16dB
-
-
-
-
-
-
-
-
0
1
1
0
0
0
0
-32dB
-
-
-
-
-
-
-
-
1
0
0
0
0
0
0
-48dB
-
-
-
-
-
-
-
-
1
0
1
0
0
0
0
-64dB
-
-
-
-
-
-
-
-
1
0
1
1
1
1
0
-79dB
1
1
X
X
X
X
X
mute
Bass filter DC modeSoft Step On/Off
0
On
1
Off
Table 53. SUBADDRESS 2: Loudness
MSB
D7
LSB
D6
D5
D4
D3
D2
D1
FUNCTION
D0
Attenuation
0
0
0
0
0
0 dB
0
0
0
0
1
-1 dB
0
0
0
1
0
-2 dB
.
.
.
.
.
.
1
0
0
1
1
-19 dB
1
0
1
0
0
-20 dB
all higher values not allowed
Loudness High Pass Corner Freq.
0
0
4 kHz
0
1
6 kHz
1
0
8 kHz
1
1
10 kHz
Soft Step On/Off
0
On
1
Off
50/74
TDA7514
Table 54. Subaddress 3: Treble Filter
MSB
D7
LSB
D6
D5
D4
D3
D2
D1
FUNCTION
D0
Gain/Attenuation
0
0
0
0
0
-15dB
0
0
0
0
1
-14dB
-
-
-
-
-
-
0
1
1
1
0
-1dB
0
1
1
1
1
0dB
1
1
1
1
1
0dB
1
1
1
1
0
1dB
-
-
-
-
-
-
1
0
0
0
1
-14dB
1
0
0
0
0
-15dB
Center Frequency
0
0
10.0kHz
0
1
12.5kHz
1
0
15kHz
1
1
17.5kHz
Speaker Coupling
0
External (AC)
1
Internal (DC)
Table 55. Subaddress 4: Bass Filter
MSB
D7
LSB
D6
D5
FUNCTION
D4
D3
D2
D1
D0
1
1
1
1
1
-15dB
1
1
1
1
0
-14dB
Gain/Attenuation
-
-
-
-
-
-
1
0
0
0
1
-1dB
1
0
0
0
0
0dB
0
0
0
0
0
0dB
0
0
0
0
1
1dB
-
-
-
-
-
-
0
1
1
1
0
-14dB
0
1
1
1
1
-15dB
Quality Factor
0
0
1.00
0
1
1.25
1
0
1.50
1
1
2
Bass Soft Step
0
off
1
on
51/74
TDA7514
Table 56. SUBADDRESS 9: Configuration Audio Processor I
MSB
D7
D6
D5
D4
D3
D2
D1
LSB
D0
FUNCTION
AP I2C Soft mute
0
1
0
0
1
1
0
1
0
1
0
1
0
0
1
1
0
1
0
1
0
1
0
1
force AP I2C mute (*)
allow AP mute from pin (*)
Soft Mute Time
Mute time = 0.48ms
Mute time = 0.96ms
Mute time = 20.2 ms
Mute time = 40.4 ms
STD mute ctrl.from AP mute
enabled (*)
disabled (*)
Bass Center frequency
60 Hz
80 Hz
100 Hz
130 Hz
Bass DC cut
on
off
Rear seat audio
on
off
(*) cfr. APSD MUTE table
Table 57. SUBADDRESS 10: Configuration Audio Processor II
MSB
D7
D6
D5
D4
D3
D2
D1
LSB
D0
0
1
0
0
1
1
0
0
1
1
0
1
0
0
1
1
52/74
0
1
0
1
0
1
0
1
0
1
0
1
FUNCTION
Loudness Treble Boost
on (advise bit7 byte10 = 1)
off (advise bit7 byte10 = 0)
Loudness Low Pass Corner Freq.
32.5 Hz
40 Hz
150 Hz
Not used (150 Hz)
Soft Step Time
280 us
560 us
1.12 ms
2.24 ms
Loudness Frequency Response
Filter on
Filter flat (can be used as an attenuator)
Rear Seat Audio Selector
quasi differential input
single ended input
tuner
mute
TDA7514
Table 58. SUBADDRESS 11: Configuration Audio Processor III
MSB
D7
D6
D5
D4
D3
D2
D1
LSB
D0
0
1
0
1
0
1
0
1
0
1
0
1
0
0
1
1
0
1
0
1
FUNCTION
APSD mute ctrl. from pin
pin influence disabled (*)
pin influence enabled (*)
Chime mix Left Front
on
off
Chime mix Right Front
on
off
Chime mix Left Rear
on
off
Chime mix Right Rear
on
off
Auto Zero enable
off
on (0->1 causes AZ sequence to start; 1
enables sequence control from latch<0>)
Beep Frequencies
500 Hz
1000 Hz
2000 Hz
3000 Hz
(*) cfr. APSD MUTE table
Table 59. SUBADDRESS 12: Stereodecoder
MSB
D7
D6
D5
D4
D3
D2
D1
LSB
D0
FUNCTION
STD I2C mute (high-ohmic + PLL hold)
0
1
0
0
1
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
force STD I2C mute (*)
allow STD mute ctrl. from pin
STD In Gain
+5.75 dB
+4.00 dB
+2.25 dB
+0.50 dB
NB AM old mode (if AM=1)
NB AM new mode (if AM=1)
Force Mono
Mono/Stereo switch automatically
Noise Blanker PEAK charge current
low
high
Pilot detector threshold
high
low
Deemphasis time constant FM AM (dep. on
source selector)
50 us 14.9 kHz
75 us 22.3 kHz
(*) cfr. APSD MUTE table
53/74
TDA7514
Subaddress 13: Stereodecoder Noise Blanker
MSB
D7
LSB
D6
D5
D4
D3
D2
D1
FUNCTION
D0
Roll Off Compensation
0
0
0
0
Not allowed
0
0
0
1
7.2%
0
0
1
0
9.4%
.
.
.
.
.
0
1
0
0
13.7%
.
.
.
.
.
0
1
1
1
20.2%
1
0
0
0
Not allowed
1
0
0
1
19.6%
1
0
1
0
21.5%
.
.
.
.
.
1
1
0
0
25.3%
.
.
.
.
.
1
1
1
1
31%
NB AM High pass Frequency
0
10 kHz
1
20 kHz
NB AM High pass filter order
0
First order
1
Second order
Disable Noise Blanker @ MP > 2.5 V (test)
0
ON
1
OFF
Multipath influence on fixed NB noise
detector discharge resistor
0
disabled
1
enabled
54/74
TDA7514
Table 60. SUBADDRESS 14: Noise Blanker
MSB
D7
LSB
D6
D5
D4
D3
FUNCTION
D2
D1
D0
0
0
0
65 mV
166%
0
0
1
60 mV
156%
0
1
0
55 mV
147%
0
1
1
50 mV
137%
1
0
0
45 mV
128%
1
0
1
40 mV
118%
1
1
0
35 mV
109%
1
1
1
30 mV
99%
Low Threshold (FM)
(AM)
Noise Controlled Threshold
0
0
320 mV
0
1
260 mV
1
0
200 mV
1
1
140 mV
0
Noise blanker OFF
1
Noise blanker ON
Over deviation threshold
0
0
Over deviation adjust 2.8V
0
1
Over deviation adjust 2.0V
1
0
Over deviation adjust 1.2V
1
1
Over deviation detector OFF
Table 61. SUBADDRESS 15: Noiseblanker & High Cut
MSB
D7
LSB
D6
D5
D4
D3
D2
D1
FUNCTION
D0
VHCH Shift ("a" factor) (**)
0
0
0
1
97%
0
0
1
0
73%
0
1
0
0
50%
1
0
0
0
32%
Strong multipath-controlled Noise Rectifier
Discharge Resistor (if bit7 byte 16 = 1)
0
0
R = infinity
0
1
R = 56Mohm
1
0
R = 33Mohm
1
1
R = 18Mohm
Noise Blanker Time
FM
AM
0
0
34 us
1130 us
0
1
24 us
755 us
1
0
29 us
950 us
1
1
22 us
651 us
(**)cfr. HCC/SB threshold table
55/74
TDA7514
Table 62. SUBADDRESS 16: Noiseblanker
MSB
D7
LSB
D6
D5
D4
D3
D2
D1
FUNCTION
D0
High cut enable
0
High Cut OFF (fixed to max corner freq.)
1
High Cut ON
Max. High Cut (***)
0
0
max N "4"
0
1
max N "13"
1
0
max N "20"
1
1
max N "31"
VHCH ("b" factor) (**)
0
0
67%
0
1
75%
1
0
83%
1
1
92%
VHCL ("c" factor) (**)
0
0
20%
0
1
25%
1
0
30%
1
1
35%
Strong multipath influence on rectifier
discharge current
0
disabled
1
enabled
(**) cfr. HCC/SB threshold table
(***) lower limit for possible automatic HC filter position; frequency is given by the following formula:
1
fp = -----------------------------------------------------N⎛ 1
1
1
---------- + ------ -------- – ----------⎞
f max 31 ⎝ f min f max⎠
with N given by the software table abovef the minimum HC filter pole frequency depends on the HC range selected (see byte 28 bits <4:3>)
56/74
TDA7514
Table 63. SUBADDRESS 17: High cut, Noise Blanker, ADC, Stdec in Switch
MSB
D7
LSB
D6
D5
D4
D3
D2
D1
FUNCTION
D0
Stereo decoder input switch
0
switch closed (signal can go into stereo decoder)
1
switch open (signal can not gon into stereo decoder)
Minimun and maximun Smeter thresholds for NB
0
0
2.2 , 4.3
0
1
3.2 , 4.6
1
0
2.7 , 4.5
1
1
3.7 , 4.7
NB max PEAK value generated from Smeter
0
0
1.8 V
0
1
1.5 V
1
0
1.1 V
1
1
OFF
HCC threshold generation mode (VHCH, VHCL)(**)
0
SNC OFF
1
SNC ON
Smeter ADC operation
0
ADC Convert Stop
1
ADC Convert Start
AM/FM mode selection for StereoDecoder
0
FM mode
1
AM mode
(**) cfr. HCC/SB threshold table
Table 64. SUBADDRESS 18: High Cut
MSB
D7
LSB
D6
D5
D4
D3
D2
D1
FUNCTION
D0
Max/Min High Cut Frequency (***)
0
0
0
0
0
20 kHz/ 10 kHz
0
0
0
0
1
.
.
.
.
.
.
1
1
1
1
1
4 kHz/ 2 kHz
0
AM 7.2kHz LPF OFF
1
AM 7.2kHz LPF ON
High Cut Filter limiting (AM)
0
Fix Maximum High Cut Frequency
1
Fix Minimum High Cut Frequency
0
Fixed High Cut OFF
1
Fixed High Cut ON
(***) High Cut LPF corner frequency formula:
fhicut = fmax / ( 1 + N / 7.75)
with N = 0,1,..,31
and fmax = 4 kHz, 10 kHz or 20 kHz according to byte 28 bit 3 and 4
57/74
TDA7514
Table 65. SUBADDRESS 19: Stereo Decoder Test Multiplexer
MSB
D7
D6
D5
D4
D3
D2
D1
LSB
D0
0
1
0
1
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
FUNCTION
Stereo Decoder test signals
OFF
Test signals enabled (if D7 of subaddress is also) “1”
External Clock
Internal Clock
Test signals
VHCCH
Smeter for ADC
Pilot Magnitude
VCO control voltage
Pilot Threshold
HOLDN
NB Threshold
F228
VHCCL
VSBL
Level for NB
HCC input
PEAK
SB input
REF 5V
F228
400kHz VCO OFF
ON
OFF
Audioprocessor test mode
OFF
Enabled if D7 of subaddress is also “1”
Table 66. SUBADDRESS 20: ISS Weather Band Controls and Adjacent Channel thresholds
MSB
D7
D6
D5
D4
D3
D2
D1
LSB
D0
0
1
x
x
0
0
0
1
0
0
1
1
58/74
0
1
0
1
0
0
1
1
0
1
0
1
FUNCTION
ISS weather band
ISS filter 20KHz (weather band) OFF
ISS filter 20KHz (weather band) ON
not used
not used
"ac" threshold ( + Ref3V )
0.25 V
0.35 V
0.45 V
0.95 V
"ac+" - "ac" thresholds difference
0.0 V
0.1 V
0.2 V
0.3 V
TDA7514
Table 67. SUBADDRESS 21: ISS Multipath
MSB
D7
LSB
D6
D5
D4
D3
D2
D1
FUNCTION
D0
Multipath control
0
ON
1
OFF
x
not used
x
not used
MP threshold
0
0
0.50 V
0
1
0.75 V
1
0
1.00 V
1
1
1.25 V
x
not used
x
not used
0
MP=1 disables "ac+" detection
1
MP=1 disables "ac" and "ac+" detection
Table 68. SUBADDRESS 22: ISS Deviation Thresholds
MSB
D7
LSB
D6
D5
D4
D3
D2
D1
FUNCTION
D0
peak detector discharge current
0
0
0
6uA
0
0
1
8uA
0
1
0
10uA
0
1
1
12uA
1
0
0
14uA
1
0
1
16uA
1
1
0
18uA
1
1
1
20uA
"dev" threshold
0
0
30 kHz
0
1
45 kHz
1
0
60 kHz
1
1
75 kHz
dev+ / dev thresholds ratio
x
0
0
1.5
0
1
1.4
1
0
1.3
1
1
1.0
not used
59/74
TDA7514
Table 69. SUBADDRESS 23: ISS Detector
MSB
D7
D6
D5
D4
D3
D2
D1
LSB
D0
ISS Enable (active low)
ON
OFF
ISS filter ON/OFF manual control
OFF
ON
ISS Filter Bandwidth manual control
120 kHz
80 kHz
discharge current;charge current mid; narrow
1uA; 74uA; 124uA
3uA; 72uA; 122uA
5uA; 70uA; 120uA
9uA; 66uA; 116uA
15uA; 60uA; 110uA
not used
0
1
0
1
0
1
0
0
0
1
1
x
0
0
1
0
1
FUNCTION
0
1
0
0
1
x
Table 70. SUBADDRESS 24: ISS Test
MSB
D7
D6
D5
D4
D3
0
0
0
0
0
0
0
1
1
1
1
1
0
1
0
1
0
1
0
1
60/74
D2
0
0
0
1
1
1
1
0
0
0
0
1
D1
0
1
1
0
0
1
1
0
0
1
1
0
LSB
D0
1
0
1
0
1
0
1
0
1
0
1
0
FUNCTION
ISS test muxer selector (test signal at pin
SMETERTC if bit7 byte17 tuner software is 1)
MPthreshold
ACNthreshold ("ac" threshold)
Dwthreshold ("dev" threshold)
Dthreshold ("dev+" threshold)
ACWthreshold ("ac+" threshold)
ac
MDSCO
ISS out
dev+
dev
refdev
DEMVout
output if bit 7 byte 28 tuner = 0
input if bit 7 byte 28 tuner = 1
ISS AC/MP test mode (pin SD)
Internal AC signal is connected to
QUALIDETECTOR AC input (normal mode)
Internal AC signal is output to pin SD (test mode)
QUALIDETECTOR AC input is driven by internal
AC signal (normal mode)
QUALIDETECTOR AC input is driven by pin SD
(test mode)
Internal MP signal is connected to
QUALIDETECTOR MP input (normal mode)
Internal MP signal is output to pin SD (test mode)
QUALIDETECTOR MP input is driven by internal
MP signal (normal mode)
QUALIDETECTOR MP input is driven by pin SD
(test mode)
TDA7514
Table 71. SUBADDRESSES 25-27: ISS Filter Control Matrix
Strong field (Sm = 0)
Truth table for ISSon
small frequency deviation
medium frequency deviation
large frequency deviation
No adjacent channel
0
0
0
Weak adjacent channel
byte 25 / bit 0
byte 25 / bit 1
byte 25 / bit 2
Strong adjacent channel
1
byte 25 / bit 3
byte 25 / bit 4
Truth table for ISS80
small frequency deviation
medium frequency deviation
large frequency deviation
No adjacent channel
0
0
0
Weak adjacent channel
byte 25 / bit 5
byte 25 / bit 6
0
Strong adjacent channel
byte 25 / bit 7
byte 26 / bit 0
byte 26 / bit 1
Table 72.
Weak field (Sm = 1)
Truth table for ISSon
small frequency deviation
medium frequency deviation
large frequency deviation
No adjacent channel
1
byte 26 / bit 2
0
Weak adjacent channel
1
byte 26 / bit 3
byte 26 / bit 4
Strong adjacent channel
1
1
byte 26 / bit 5
Truth table for ISS80
small frequency deviation
medium frequency deviation
large frequency deviation
No adjacent channel
byte 26 / bit 6
byte 26 / bit 7
0
Weak adjacent channel
byte 27 / bit 0
byte 27 / bit 1
byte 27 / bit 2
Strong adjacent channel
1
byte 27 / bit 3
byte 27 / bit 4
Table 73. SUBADDRESS 28: VSBL Generation, HC Range
MSB
D7
LSB
D6
D5
D4
D3
D2
D1
FUNCTION
D0
VSBL ("d" factor) (**)
0
0
0
29%
0
0
1
33%
0
1
0
38%
0
1
1
42%
1
0
0
46%
1
0
1
50%
1
1
0
54%
1
1
1
58%
High Cut filter range
0
0
20 kHz - 4 kHz
0
1
10 kHz - 2 kHz
1
0
4 kHz - 800 Hz
1
1
4 kHz - 800 Hz
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TDA7514
Table 74. Audio Processor / Stereo Decoder Mute
BYTE 9
BIT 0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
BYTE 9
BIT 3
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
byte 12 bit 0 = 0 force I2Cbus STD mute
byte 9 bit 0 = 0 force I2Cbus AP mute
11 bit 0 = 1 AP / STD mute depends on pin
HCC control from SNC
VHCH = 2V + 3V * a * b
VHCL = 2V + 3V * a * b *c
HCC control from level
(level = Smeter * 0.7)
VHCH = ab 4V
VHCL = abc 4V
SBL
VSBL = 2V + d 3V
62/74
BYTE 11
BIT 0
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
BYTE 12
BIT 0
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
pin
55
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
status
AP
mute
mute
mute
mute
mute
mute
mute
mute
mute
mute
mute
mute
mute
mute
mute
mute
play
play
play
play
mute
play
mute
play
play
play
play
play
mute
play
mute
play
status
STD
mute
mute
mute
mute
mute
mute
mute
play
mute
mute
play
play
mute
mute
mute
play
mute
mute
play
play
mute
mute
mute
play
mute
mute
play
play
mute
mute
mute
play
TDA7514
5
FUNCTIONAL DESCRIPTION
5.1 FM TUNER SECTION
5.1.1 FRONT END
The FM tuner section features an image rejection mixer. Its low noise figure allows connecting the antenna
to the mixer without any discrete preamplifier. The external preselection circuit can be realized with one
tuned filter only. The filter can be electrically aligned by shifting the filter tuning voltage with respect to the
VCO tuning voltage through an 8 bit DAC.
The mixer image rejection trimming is obtained by tuning the relative phase offset and relative gain of the
I and Q mixer paths. The mixer output (common with the AM 1st mixer output) is connected to a tuned IF
transformer, with the possibility of electrically adjusting the center frequency through an internal 4 bit capacitor bank.
The FM AGC can operate in two different software-selectable modes:
– Keyed Wide band mode: the AGC detects the strength of the wide band RF signal at the input of the
1st mixer to activate the AGC attenuation; the starting point is programmable via software and is varied over a >40 dB range by the very narrow band Smeter signal in order to set a maximum suppression limit that prevents the desired channel from decreasing below an acceptable level;
– Wide band + Narrow band mode: the AGC detects the strength of both the wide band RF signal at
the input of the 1st mixer and of the narrow band IF signal at the output of the IFT1(both starting points
are software-programmable); this mode allows a smooth transition between near adjacent and far adjacent suppression.
The AGC features a single current output used to drive the front end P-I-N diode attenuator.
5.1.2 IF FILTERING
FM channel selection is mainly done by use of external ceramic filters. Two different software-programmable configurations are available:
– normal FM mode: three ceramic filters can be connected using two impedance-matched IF amplifiers
(both with programmable gains); the third ceramic filter is connected to the 2nd mixer input;
– high-performance Weather Band applications: when an optimum Weather Band channel selection is
required, the TDA7514 allows to connect a dedicated narrow band external 450 kHz ceramic filter to
implement this function. In this case only two 10.7 MHz ceramic filters can be connected for standard
FM selectivity. The 1st ceramic filter is normally connected between the IFT1 output and the 1st IF
amplifier input; the 2nd ceramic filter is connected between the 1st IF amplifier input and the 2nd mixer input; the 450 kHz WB filter is connected between the 2nd IF amplifier output and the 2nd IF amplifier input. Both the single standard FM IF amplifier gain and the 450 kHz WB filter driver IF amplifier
gain are software programmable.
5.1.3 LIMITING AND DEMODULATION
The TDA7514 features a fully integrated FM demodulator which requires a lower IF than 10.7 MHz. Therefore a 2nd mixer is provided to down-convert IF1 down to 450 kHz. The 10.25 MHz frequency needed to
drive the 2nd mixer is provided by the XTAL oscillator. Limiting is performed at IF2 through a 5 stage limiter. The demodulator exhibits a very linear frequency-voltage conversion. Precise cancellation of the demodulator output voltage offset is available via software control especially for high audio gain WB
applications.
Field strength measurement (Smeter) is performed through use of a separate IF1 limiter and logarithmic
amplifier. The IF1 limiter output is also used to feed the FM IF counter block.
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TDA7514
VARIABLE-BANDWIDTH SELECTIVITY SYSTEM (ISS)
The TDA7514 is equipped with the Intelligent Selectivity System that automatically performs IF bandwidth
reduction in presence of strong adjacent channels or weak desired signal. A three position filter is available
at IF2; its bandwidth settings are: 120 kHz, 80 kHz and 22 kHz (the latter only for additional on-board WB
filtering). The filter is positioned between the 2nd mixer and the IF2 limiter. The filter is switched among
its OFF, 120 kHz and 80 kHz positions by a dedicated quality detection circuit.
The conditions that are detected in order to drive the filter position are:
– adjacent channel presence;
– peak frequency deviation magnitude;
– field strength.
The adjacent channel detection (programmable filter shape and gain, programmable rectifier gain, programmable flag generation thresholds, programmable integrator charge/discharge currents) can be partially or totally disabled, if so programmed, when a strong multipath condition is detected (filter shared with
quality circuits with programmable gain, independent rectifier with programmable gain, programmable intervention threshold). The adjacent channel detector is further disabled when the field strength is lower
than a programmable threshold (slope programmable as well). The output of the detector are two flags
signalling a moderate or a strong adjacent channel presence.
The peak frequency deviation is detected by rectifying and peak-detecting the mono part of the MPX signal
(programmable integrator charge/discharge currents, programmable thresholds). The deviation detector
is desensitized at weak field strength (programmable threshold). The output of the detector are two flags
signalling a moderate or high amount of peak deviation.
The field strength is measured against a programmable threshold and generates one flag.
These five flags are combined to control the ISS bandwidth by access to a 3-D matrix that can be programmed almost completely: it is therefore possible to specify the filter bandwidth for almost all the possible flag combinations.
The ISS filter may be disabled by setting the tuner SEEK bit to "1".
5.1.4 SOFT MUTE AND MPX OUTPUT
The demodulator output is passed through muting attenuators before becoming available externally for
the connection to the stereo decoder. The muting and output buffering are shared with the AM circuit.
The FM muting circuit is sensitive to weak field strength and to the presence of adjacent channel. The
weak field strength condition (soft mute) is detected by comparing the 1 second-filtered Smeter with a programmable threshold. The soft mute depth and slope are software-programmable.
The soft mute is followed by the adjacent channel muting circuit. The presence of adjacent channel is detected as high frequency noise in the MPX signal, so that only the adjacent channel that is not suppressed
by the ISS can activate this muting. The filter is described in the Quality section. It is desensitized under
weak field strength conditions. The adjacent channel mute threshold/slope and depth are programmable.
The output audio amplifier gain can be switched to a +23.5 dB setting in WB in order to equalize the FM
and WB 100% modulation audio levels.
ISS-dependent automatic roll-off compensation is implemented before the output buffer.
5.1.5 STATION DETECTION
The station detection function makes use of signal strength measurement and of IF counting. The result
is available on the SD pin as a logic high value when the tuned channel is considered valid. On the SD pin
the two field strength-related and IF counter output signals are also available separately by suitably programming the output multiplexer.
The field strength-related digital output is derived by comparison of the filtered Smeter (the time constant
is 1s in reception and 100us in seek mode - see Quality section) with a programmable threshold.
The FM IF counter circuit detects whether the IF signal is centered inside a programmable frequency window around the nominal frequency value. The measuring time window is programmable as well. The result
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TDA7514
is available both on the SD pin and in the tuner I2C bus read byte.
5.1.6 QUALITY
The FM quality section of the TDA7514 generates the control signals for all the quality-related functions.
These quality signals are: filtered Smeter, adjacent channel content, multipath content. The controlled
functions are: AGC keying, soft mute, adjacent channel mute, stereo blend, high cut, audio noise blanker.
Externally available quality signals are also generated by this circuit. These signals are: filtered Smeter
(analog and digital), adjacent channel content and multipath content.
External filtering to generate part of the quality signals uses external capacitors: the voltage values on
these capacitors can be kept stored during RDS AF update or fast charged when a new tuned frequency
is selected.
The Smeter filter uses an external capacitor to generate a low-pass time constant of 1 s in reception mode
(10 ms for fast car-radio testing), and an all-internal circuit for a low-pass time constant of 100 us for RDS
AF update. The voltage across the capacitor is stored during RDS AF update; it is fast charged following
the 100 us-filtered signal during jumps to a new frequency. The 1s/100us Smeter is fed to the station detector, to the high cut filter, to the soft mute and to the A-to-D converter.
An internally filtered 1ms-time constant Smeter is further generated to drive the keyed AGC, the ISS and
the weak field filter desensitization circuits.
The stereo blend function is driven by a combination of weak signal strength-, adjacent channel- and multipath-related information through the SNC (stereo noise control) signal. The SNC signal is a wired-OR of
the three conditions and is generated with a peak holder featuring a 400 ms attack time constant and a 10
s decay time constant. The Smeter contribution to the SNC is programmable in terms of gain and offset;
the same is true for the two other bad quality indicators (filter shape, rectifier offset and gain are programmable) keeping in mind that the adjacent channel filter and rectifier are shared with the adjacent channel
mute circuit and that the multipath filter is shared with the ISS multipath detector. The voltage across the
external SNC filtering capacitor is stored during RDS AF update, and is driven by a fast charge circuit during jumps to a new frequency. A fast car-radio test mode is also available in which the external capacitor
is disconnected and substituted for by a much smaller internal capacitor.
A faster attack of the stereo blend function in case of sudden onset of adjacent channel or multipath conditions is ensured by actually driving the stereo blend circuit by a further wired-OR circuit sensing the SNC
voltage as well as the unfiltered multipath and adjacent channel rectifier outputs.
The quality signals available to the u-processor are: filtered Smeter (on the dedicated buffered SMETER
pin), the multipath information (on pin QUALMPOUT), a programmable combination of multipath and adjacent channel information (on pin QUALACMPOUT), and 6 bit digitized filtered Smeter (via the tuner I2C
bus read byte).
5.2 AM TUNER SECTION
5.2.1 FRONT END
The AM tuner front end section consists of a high IP3 mixer whose outputs are common with the FM first
mixer.
After going through the first FM IF1 ceramic filter the signal enters the second mixer for conversion to the
second IF of 450 kHz where channel selection takes place. The second mixer exhibits a high IP3 value
too, and has a fixed gain.
The front end AGC detects mainly a wide band signal (RF signal from the input pins of the first mixer) and
a very narrow band signal (Smeter, generated by the signal at the input of the IF2 amplifier after channel
selection has occurred). A third fairly narrow band input (IF1 signal from the input pin of the second mixer)
is also available, although the first mixer-input-referred IP3 figures of the two mixers make this input generally superfluous. The FE AGC starting points on all three input channels are programmable.
The FE AGC circuit drives the external attenuation P-I-N diodes and the external RF amplifier gain control
terminal.
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TDA7514
5.2.2 IF NOISE BLANKER
An IF noise blanker circuit is present to detect and remove impulse noise especially at weak field strength
levels. The noise spikes are detected at the output of the first mixer and noise cancelling takes place in
the second mixer. The necessary delay in the signal path is provided by the IF1 ceramic filter.
The detection circuit consists of an expressly-built IF1 limiter and Smeter detector (not the same used for
FM Smeter generation), followed by a pulse detector. The sensitivity of the noise blanker is programmable.
The IF NB is desensitized at high field strength (using the filtered Smeter) and the desensitization threshold can be programmed.
5.2.3 IF AMPLIFIER AND DETECTOR
After channel selection by means of the IF2 ceramic filter, the AM signal is amplified by a very high gain
(up to 70 dB, programmable) linear amplifier, and demodulated by an integrated quasi-synchronous detector. The phase information for the detector is derived from the IF2 limiter (shared with the FM signal
path) whose input is the IF2 amplifier input pin. The same IF2 limiter is used to generate the AM Smeter
information since it uses a narrow band signal and is not subjected to AGC.
The IF2 amplifier gain is controlled by the AGC2 loop.
The IF2 limiter output is also used to generate the input signal for the AM IF counter.
5.2.4 AUDIO OUTPUT
The demodulated signal is buffered on the same output pin used for the FM MPX signal and is subjected
to the action of the soft mute circuit as well (programmable threshold/slope). The controlling signal for this
function is the filtered Smeter.
5.2.5 STATION DETECTION
Station detection in AM is done evaluating the field strength and the IF2 signal frequency position.
The field strength detector (sensing the filtered Smeter) has a programmable threshold.
The programmability of the IF counter is the same as for the FM IF counter, albeit with different center
frequency, frequency window and sampling time programming.
The SD information or the single weak field strength information or IF counter result are available at the
SD pin.
The Smeter is available both in analog format (buffered at the SMETER pin) and in a 6 bit digital format
(tuner I2C bus read byte).
5.3 TUNING SECTION
5.3.1 VCO AND DIVIDERS
One VCO is used for both AM and FM tuning. To implement the world tuning concept (one VCO application for all the geographical areas), the VCO runs at approximately 200 MHz. Digital dividers generate the
LO signals suitable for the AM and FM 1st mixers.
The VCO itself is a two-pin base-input collector-output bipolar amplifier.
A first divider by 1, 2 and 3 is present to generate the FM LO frequency and to be fed to the PLL. A second
divider by 4, 6, 8 and 10 is present to generate the AM LO frequency. For FM tuning it is possible to program whether the mixer works in high- or in low-side injection mode. A 90â phase shift circuit operated on
the output of the first divider to generate the I and Q portions of the LO for the FM image rejection mixer.
5.3.2 XTAL OSCILLATOR
A 10.25 MHz crystal oscillator is used to generate the reference frequency of the tuning PLL and of the
switched capacitor circuits of the TDA7514. The oscillation frequency can be finely adjusted by programming internal capacitors (5 bit).
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TDA7514
5.3.3 PLL
Tuning is achieved thanks to a high speed PLL for fast RDS operation. The VCO input (after the first divider) is divided through a swallow counter-divider and compared to the divided 10.25 MHz reference frequency (fully programmable divider).
In FM the absence of a locked condition can be detected in order to automatically enable the charge pump
current and loop filter bandwidth to increase in order to speed up the locking process. Automatic switch
back to a lower charge pump current and narrower loop filter bandwidth can also be forced by the lock
detector, thus achieving a slower but less noisy operation of the tuning loop. Both the high and the low
values of the charge pump current are programmable.
Two separate loop filters can be used for optimized AM and FM operation.
5.3.4 STEREO DECODER SECTION
The stereo decoder is crossed by both the AM and the FM signal. The AM signal is only low-pass filtered
and subjected to audio noise blanking if necessary; the FM MPX signal is stereo demodulated, low-pass
filtered and blanked against impulse noise if necessary.
5.4 FM MODE
5.4.1 INPUT STAGE
The FM stereo decoder input stage provides a high-input impedance buffering. The input impedance is
opened during the RDS AF update phase by software or external pin control (programmable function) in
order not to discharge the coupling capacitor placed between the tuner output and the stereo decoder input, and so speed up the return to normal listening.
The audio noise blanker circuit is fed from the stereo decoder buffer output: when the input impedance is
open during RDS AF update, the noise blanker is still able to work for a short period of time before the
capacitance associated with the buffer input stage is discharged.
During RDS AF update the output of the buffer is muted to avoid letting transient signals leak through the
audio processor section.
An additional input series switch has been added to perform the stereo decoder auto zero function (see
also Audio Processor section). This switch must be opened before selecting the tuner as the audio source
in order to allow the stereo decoder internal filters to discharge before the offset measurement is performed.
The input buffer in FM mode is followed by an 80 kHz low-pass filter to remove high frequency noise.
5.4.2 PLL
The buffered MPX signal is fed to a 19 kHz-centered band-pass filter and subsequently to a PLL used to
regenerate the 38 kHz carrier for stereo demodulation.
The PLL compares the pilot tone with the divided output frequency of an internal VCO running at 456 kHz,
locking its operating frequency and phase to that of the pilot tone. The PLL status can be stored during
the RDS AF update phase in order to speed up subsequent returning to normal listening conditions.
Since the VCO tuning range is small, the VCO needs being adjusted to a setting that ensures lock is
achieved when a pilot tone is present. On the current TDA7514 version it is necessary to perform this
alignment during the car-radio test phase, by injecting a 19 kHz tone into the stereo decoder and changing
the VCO programming until a lock condition is reached.
The presence of a stereo signal is detected in this block by measuring the peak value of the pilot tone and
comparing it with a programmable threshold. The resulting information can be read back via I2C bus (audio
processor/stereo decoder I2C read byte).
5.4.3 STEREO DEMODULATOR AND BLEND
The MPX signal is fed to the stereo demodulator where the L and R outputs are derived. In case of a stereo
transmission in weak field or bad reception conditions (see FM tuner quality section) a gradual transition
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TDA7514
from stereo to mono is performed. The signal strength thresholds for the automatic stereo blend functions
can be set by programming the gain of the Smeter contribution to the SNC signal (compared to a fixed
threshold sets the full stereo point) and subsequently programming the voltage threshold against which
the SNC signal is compared to set the full mono threshold.
In case the transmission is stereo, it is possible if so desired to set it to forced mono to improve the received SNR.
The TDA7514 stereo demodulator additionally performs the functions of roll-off compensation and pilot
cancelling. The amount of the former is programmable. The latter function is activated when an FM MPX
signal with pilot tone is detected; the function is disabled in AM and in FM if no pilot tone is detected.
5.4.4 HIGH CUT AND DE-EMPHASIS FILTERS
The L and R signals are low-passed filtered by the high cut and, subsequently, by the de-emphasis filter.
The high cut filter consists of a fixed resistor and a 5 bit digitally-controlled binary-weighted capacitor
(whose value therefore changes between Cmin and Cmin + 32 x Cstep). The digital control is done by
converting the filtered Smeter into a 5 bit word. Programming the internal resistor value, three possible
corner frequency ranges (800 Hz - 4 kHz, 2 kHz - 10 kHz, 4 kHz - 20 kHz) are available. It is possible to
force the actual range to be smaller than one of the above mentioned ones by setting:
– the maximum capacitor value (4 position programmable control);
– a 5 bit word to be used as limit (32 possible values), in conjunction with a bit that sets whether this
limit is to be used as a maximum or as a minimum;
– it is additionally possible, if so desired, to keep the high cut filter to a fixed position by sending the
position code in the previously mentioned 5 bit register and further setting a dedicated bit;
– the high cut filter can also be defeated via a dedicated bit.
The controlling signal for this filter is chiefly the filtered Smeter. It is also possible to program the high cut
control input selector to use the SNC instead of the Smeter. The contributions to the SNC signal from the
Smeter, adjacent channel and multipath detectors is the same as for the stereo blend function. The level
"0" of the converted signal (corresponding to the maximum filter corner frequency) is obtained when the
control signal is equal to or greater than the programmable threshold VHCCH. The level "31" (corresponding to the minimum filter corner frequency) is obtained when the control signal is equal to or smaller than
the programmable threshold VHCCL. Noise blanking is performed at this stage. "Corners" in the waveform
due to the holding action of the noise blanking circuit are smoothed by the successive de-emphasis filter.
The fixed de-emphasis filter can be programmed to 75 us and 50 us; in AM mode it is shifted to a seven
times higher corner frequency.
5.4.5 AM MODE
In AM mode the PLL is on though no pilot tone is present; the stereo demodulator is forced to work in the
mono configuration and the pilot canceller is off.
5.4.6 INPUT STAGE
The only difference between the AM and the FM configuration of the input stage lies in the input impedance only (30 kOhm for AM, 100 kOhm for FM). The functions are identical.
5.4.7 DELAY FILTER
The input stage is followed by a fourth order low-pass filter with a cut-off frequency of approximately 4 kHz
and a delay of approximately 130 us whose main purpose is to generate the delay in the signal path necessary for audio noise blanking. The filter contributes to the low-pass filtering of the AM signal as well.
5.4.8 HIGH CUT FILTER
The high cut filter is AM can be used both statically by programming a fixed corner frequency (the 800 Hz
– 4 kHz range has been specifically designed for AM although it is available also in FM) or dynamically,
exactly like the FM high cut filter. See the FM high cut filter section for further details.
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The de-emphasis filter is shifted to a seven times higher corner frequency in AM mode with respect to the
FM mode.
5.4.9 AUDIO NOISE BLANKER SECTION
The operation of the audio noise blanker varies in FM and in AM.
5.4.10 FM MODE
The FM noise blanker triggering circuit acts as a peak-to-average detector on the high-passed MPX signal. The input 140 kHz high-pass filter removes the desired audio part so that the impulse noise is more
easily detected. The high-pass signal then follows two different paths:
– after rectification it is fed to one terminal of the trigger comparator; the impulse noise is present on
this path together with high frequency noise;
– after rectification it is fed to a slow peak detector which is not able to follow the impulse noise but
whose output (PEAK signal) represents the white high frequency noise level; the output of the slow
rectifier is the main input of the threshold generation circuit, whose output is applied to the second
terminal of the trigger comparator.
The threshold generation circuit generates a threshold as a monotonically increasing function of the PEAK
signal. The function can be programmed in its linear coefficient and in its second order coefficient.
For superior performance in the dynamically changing car-radio environment the activation threshold is
further influenced by three other parameters: field strength, FM frequency deviation and multipath presence.
The influence of these parameters can be disabled and is programmable. The parameter influence on the
noise blanker sensitivity is as follows:
– field strength: when the field strength decreases the noise blanker less becomes less sensitive (at
low field strength white noise becomes higher and false triggering becomes more likely);
– frequency deviation: if the FM frequency deviation is high, the noise blanker becomes less sensitive;
this is due to the fact that a large deviation causes a high MPX level which in turn might not be rejected enough by the noise blanker detector input high-pass filter, thus causing false triggering;
– multipath: the presence of a strong multipath condition increases the sensitivity of the noise blanker.
The triggering comparator output activates a retriggerable monostable circuit whose output drives the
"Hold" switch in the high cut filter section. The blanking time is programmable and the whole noise blanker
action is defeatable via software.
5.4.11 AM MODE
In AM mode the noise blanker detector can operate in two different ways. For both modes the possibility
to low-pass the signal entering the noise blanker detector is foreseen (7.2 kHz LP filter software defeatable), in order to be able to reduce the white noise effect on the detector that may lead to false triggering,
especially for AM mode 1.
5.4.12 AM MODE 1
This noise blanker operation mode is similar to the FM operation mode. The input audio signal taken before the delay filter (see stereo decoder in AM) can be low-pass filtered (see AM mode description above)
and is subsequently high-pass filtered with a filter programmable in terms of corner frequency and order.
The resulting signal still contains the impulse noise information, high frequency noise (depending on the
activation of the 7.2 kHz filter) and audio (it is not possible to effectively eliminate all the audio content
because the AM channel bandwidth - determined by the IF2 ceramic filter - is barely wider than the signal
bandwidth, and the spectral differences between the impulse noise and the signal are small).
The signal is then applied to the same peak-to-average detector that is used for FM; the difference is that
the deviation detector is not influencing the threshold generation in this case. The noise blanking time, programmable also for AM, is about 30 times longer than for FM.
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5.4.13 AM MODE 2
In this operation mode the detector operates in a much more straightforward configuration: the instantaneous AM audio level is compared with a fixed programmable threshold, and the comparison result activates the retriggerable monostable. The advised programmed threshold corresponds to an equivalent
140% AM modulation level.
5.5 AUDIO PROCESSOR SECTION
5.5.1 INPUTS
The audio processor input section features a main channel multiplexer, a rear channel multiplexer (RSA,
Rear Seat Audio function), an input gain stage and autozero circuit.
The main channel multiplexer allows connecting the following sources to the main audio processing path:
– 1 quasi-differential source;
– 1 stereo differential source;
– 1 mono differential source;
– tuner output (AM, FM);
– beep generator.
The RSA selector (see speaker output section) can connect the rear speaker outputs to the following
sources bypassing all the tone and volume control:
– 1 quasi-differential source;
– 1 stereo differential source;
– tuner output (AM, FM).
The different sources are subjected to the following input attenuations:
– quasi-differential source: -4 dB
– stereo differential source: 0 dB
– mono differential source: -4 dB.
The main channel signal path features an input gain stage (0..+15 dB, 1 dB step) to equalize the different
source levels and the autozero circuitry that removes the DC offset generated between the input pins and
the input gain stage output.
The autozero procedure is automatically run every time byte 0 of the audio processor I2C software is addresses, that is every time the main source is changed or the input gain is changed. In case the new
source is the stereo decoder the source change must be preceded by opening the stereo decoder input
for a time long enough to discharge the stereo decoder internal filters (see stereo decoder input section).
The same is true even when the source is switched from AM to FM and vice-versa. The autozero procedure can be manually activated through a dedicated bit, and can be prevented from running by setting a
different dedicated bit. The beep generator is considered a main channel source, and it can generate a
500 Hz, 1 kHz, 2 kHz, 3 kHz tone.
5.5.2 SOFT MUTE
The input stage is followed by a soft mute stage aimed at automatically and smoothly driving the audio
processor from its current state into a full mute condition. The overall transition time is software selectable.
It is possible to control the stereo decoder RDS AF update mute circuits (input impedance open switch
("high ohmic mute"), stereo decoder mute and PLL hold) from the audio processor soft mute.
5.5.3 LOUDNESS FILTER
The TDA7514 features a loudness function made up by a 20 dB attenuator in 1 dB steps, a second order
LP filter with programmable corner frequency and a defeatable high pass filter with programmable corner
frequency.
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The attenuator has been realized employing the "soft step" technique that reduces the audible DC click at
the speaker outputs by dividing the 1 dB step into several smaller-amplitude, longer duration transitions.
5.5.4 VOLUME CONTROL
The volume stage controls the level over a +15 dB..-79 dB + mute range in 1 dB steps. The volume attenuator is also realized with the soft step circuitry.
5.5.5 TREBLE FILTER
The treble filter consists of a second order resonating filter with programmable center frequency. The
boost/cut range is !15 dB in 1 dB steps.
5.5.6 BASS FILTER
The bass filter consists of a second order resonating filter with programmable center frequency and quality
factor. It is also possible to set and defeat the DC mode both in cut and in boost. The boost/cut range is
!15 dB in 1 dB steps and the attenuator features the soft step circuitry.
5.5.7 SPEAKER ATTENUATORS
The speaker attenuator driver circuit allows separate volume control for each of the four outputs. The level
is controlled over a +15 dB.. -79 dB + mute range in 1 dB steps with soft step.
An output buffer provides DC shift to a typical 4V level and an AC gain of +4 dB.
The source of each speaker output circuit can be chose among the following configurations:
– tone control output via external AC coupling (coupling shared by front and rear channels);
– tone control output via internal DC coupling (coupling shared by front and rear channels);
– rear seat audio (only for rear channels).
It is furthermore possible to mix an external source (typically the chime source) on all the four outputs,
selecting on which outputs the mixing must take place (any combination is allowed). The volume of the
mixing source cannot be changed internally.
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Table 75. TQFP80 Mechanical Data & Package Dimensions
mm
DIM.
MIN.
inch
TYP.
A
MAX.
MIN.
TYP.
1.60
A1
0.05
A2
1.35
B
0.22
C
0.09
0.063
0.15
0.002
0.006
1.40
1.45
0.053
0.055
0.057
0.32
0.38
0.009
0.013
0.015
0.20
0.003
0.008
D
16.00
0.630
D1
14.00
0.551
D3
12.35
0.295
e
0.65
0.0256
E
16.00
0.630
E1
14.00
0.551
E3
12.35
0.486
L
0.45
L1
0.60
0.75
0.018
1.00
K
OUTLINE AND
MECHANICAL DATA
MAX.
0.024
0.030
TQFP80
(14x14x1.40mm)
0.0393
3.5°(min.), 7°(max.)
D
A
D1
A2
D3
A1
41
60
40
61
0.10mm
.004
Seating Plane
e
E3
E1
E
B
Gage plane
PIN 1
IDENTIFICATION
0.25mm
21
80
1
20
K
TQFP80L
C
L
L1
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Table 76. Revision History
Date
Revision
June 2005
1
Description of Changes
First Issue
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Information furnished is believed to be accurate and reliable. However, STMicroelectronics assumes no responsibility for the consequences
of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. No license is granted
by implication or otherwise under any patent or patent rights of STMicroelectronics. Specifications mentioned in this publication are subject
to change without notice. This publication supersedes and replaces all information previously supplied. STMicroelectronics products are not
authorized for use as critical components in life support devices or systems without express written approval of STMicroelectronics.
The ST logo is a registered trademark of STMicroelectronics.
All other names are the property of their respective owners
© 2005 STMicroelectronics - All rights reserved
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