TEMIC TDA4471

TDA4471
TELEFUNKEN Semiconductors
Multistandard Video-IF and Quasi Parallel Sound Processing
Description
The TDA4471 is an integrated bipolar circuit for full
multistandard video/sound IF (VIF/SIF) signal
processing in TV/VCR and Multimedia applications. The
circuit processes all TV video IF signals with negative
modulation (e.g. B/G standard), positive modulation
(e.g. L standard) and the AM, FM/NICAM sound IF
signals. Specially two video IF inputs (2 x VIF) in
combination with one sound IF input (1 x SIF) and the
common pinning with the TDA4474 gives flexibility to
design a universal IF module for various applications.
Features
5V supply voltage; low power consumption
Intercarrier output signal is gain controlled
Active carrier generation by FPLL principle
(frequency–phase–locked–loop)
synchronous demodulation
for
true
Very linear video demodulation, good pulse
response and excellent intermodulation figures
VCO circuit is operating on picture carrier
frequency, the VCO frequency is switchable for
the L’ mode
Alignment–free AFC without external reference
circuit, polarity of the AFC curve is switchable
VIF–AGC for negative modulated signals
(peak sync detection) and for positive modulation
(peak white/black level detector)
Tuner AGC with adjustable take over point
(necessary for digital sound processing)
Complete alignment–free AM demodulator with
gain controlled AF output
Separate SIF–AGC with average detection
Parallel operation of the AM demodulator and
QPS mixer (for NICAM–L stereo sound)
Two video IF inputs (2 x VIFin)
One sound IF input (1 x SIFin)
Package and relevant pinning is compatible with
the TDA4474; simplifies the design of an
universal IF module
Package:
30 pin shrink–dual–inline–plastic (SDIP30)
Alignment–free quasi parallel sound (QPS) mixer
for FM/NICAM sound IF signals
Rev. A1: 18.08.1995
Preliminary Information
1 (16)
TDA4471
TELEFUNKEN Semiconductors
Ï
Ï
Loop
filter
Offset
comp.
(optional)
VCO
ÏÏ
ÏÏ ÏÏ
ÏÏ Ï
Ï Ï
Ï
28
20
0°
90°
FPLL
23
22
VCO
+
phase shift
L’ switch
and VIF input switch
16
Control
ÏÏ Ï
ÏÏ
ÏÏ Ï
ÏÏ
21
Ï
Ï
Ï
Ï
Ï
Ï
Ï
Ï
10
VIF 2
AFC
VIF amp
6
VIF 1
CAGC
Tuner
Video
Video det.
8
Ï
Ï
Ï
Take over
point
Standard
Tuner
AGC
Supply
FM det.
VS
19
CRe
26
Ï
Ï
Ï
Ï
Intercarrier
(FM / NICAM)
29
n.c.
30
n.c.
SIF amp
3
n.c.
27
AGC
(SIF)
Ï
Ï
AM det.
5
AF (AM)
4,9,18
95 9702
Figure 1.
2 (16)
Standard
switch
f
2
CAGC
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Ï
ÏÏ
ÏÏ
ÏÏ
ÏÏ
ÏÏ
ÏÏ
ÏÏ
ÏÏ
ÏÏ
ÏÏ
ÏÏ
ÏÏ
ÏÏ
25
1
SIF 1
ÏÏ Ï
15
AGC
(VIF)
13
12
AFC
14
7
17
CBL
24
11
AFC
switch
Block diagram
Preliminary Information
Rev. A1: 18.08.1995
TDA4471
TELEFUNKEN Semiconductors
Pin Description
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Pin
1, 2
3
4
5
6, 7
8
9
10, 11
12
13
14
15
16
17
18
19
20
21
22, 23
24
25
26
27
28
29
30
Symbol
Vi,SIF1
n.c.
GND
CAGC
Vi,VIF1
CAGC
GND
Vi,VIF2
Rtop
Itun
Vo,vid
Vsw
Vsw
Cbl
GND
Cref
LF
Vsw
Vvco
VAFC
Vs
Vo,FM
Vo,AM
Rcomp
n.c.
n.c.
Function
SIF1 input (symmetrical)
not connected
Ground
SIF–AGC (time constant)
VIF1 input (symmetrical)
VIF–AGC (time constant)
Ground
VIF2 input (symmetrical)
Take over point, tuner AGC
Tuner AGC output current
Video output
Standard switch
L’–/VIF input selector switch
Capacitor – black level detector
Ground
Internal reference voltage
Loop filter
AFC switch
VCO circuit
AFC output
Supply voltage
Intercarrier output
AF output – AM sound
Offset compensation
not connected
not connected
Vi,SIF1 1
30 n.c.
Vi,SIF1 2
29 n.c.
n.c.
3
28 Rcomp
GND
4
27 Vo,AM
CAGC
5
26 Vo,FM
Vi,VIF1
6
25 VS
Vi,VIF1
7
24 VAFC
CAGC
8
23
GND
9
22 VVCO
VVCO
Vi,VIF2 10
21
VSW
Vi,VIF2 11
20
LF
Rtop 12
19
CRef
Itun 13
18
GND
Vo,vid 14
17
Cbl
16
VSW(L’)
VSW(stand.) 15
95 9703
Figure 2. Pin configuration
Rev. A1: 18.08.1995
Preliminary Information
3 (16)
TDA4471
TELEFUNKEN Semiconductors
Circuit Description
Vision IF amplifier
The video IF signal (VIF) is fed through a SAW filter to
one of the two VIF inputs (Pins 6–7 or 10–11). The
selection of VIF input is controlled by Pin 16 in combination with the standard switch. With a minimal external
expense it is possible to switch between two different
SAW filters. Both VIF inputs features excellent
cross–talk attenuation and an input impedance which is
independent from the switching condition. The VIF
amplifier consists of three AC–coupled amplifier stages.
Each differential amplifier is gain controlled by the
automatic gain control (VIF–AGC). Output signal of the
VIF amplifier is applied to the FPLL carrier generation
and the video demodulator.
Tuner– and VIF–AGC
At Pin 8 the VIF–AGC charges/discharges the AGC
capacitor to generate a control voltage for setting gain of
VIF amplifier and tuner in order to keep the video output
signal at a constant level. Therefore in case of negative
modulated signals (e.g. B/G standard) the sync level of
the demodulated video signal is the criterion for a fast
charge/discharge of the AGC capacitor. For positive modulation (e.g. L standard) the peak white level of video
signal controls the charge current. In order to reduce
reaction time for positive modulation, where a very large
time constant is needed, an additional black level detector
(Pin 17) controls the discharge current in the event of
decreasing VIF input signal. The AGC voltage is
transferred to an internal control signal, and is fed to the
tuner AGC to generate the tuner AGC current at Pin 13
(open collector output).
Take over point of the tuner AGC can be adjusted at
Pin 12 by a potentiometer or an external DC voltage
(from interface circuit or microprocessor).
FPLL, VCO and AFC
The FPLL circuit (frequency phase locked loop) consists
of a frequency and phase detector to generate control
voltage for the VCO tuning. In the locked mode the VCO
is controlled by the phase detector and in unlocked mode
the frequency detector is superimposed. The VCO
operates with an external resonance circuit (L and C
parallel) and is controlled by internal varicaps. The VCO
control voltage is also converted to a current and
represents the AFC output signal at Pin 24. With the AFC
switch (Pin 21) three operating conditions of the AFC are
possible: AFC curve ”rising” or ”falling” and AFC ”off”.
A practicable VCO alignment of the external coil is the
adjustment to zero AFC output current at Pin 24. At centre
4 (16)
frequency the AFC output current is equal to zero. Furthermore, at Pin 16, the VCO centre frequency can be
switched for setting to the required L’ value This function
is active when ”L mode” is selected by the standard
switch.
The optional potentiometer at Pin 28 allows an offset
compensation of the VCO phase for improved sound
quality (fine adjustment). Without a potentiometer (open
circuit at Pin 28) this offset compensation is not active.
The oscillator signal passes a phase shifter and supplies
the in–phase signal (0) and the quadrature signal (90) of
the generated picture carrier.
Video demodulation and amplifier
The video IF signal, which is applied from the gain
controlled IF amplifier, is multiplied with the inphase
component of the VCO signal. The video demodulator is
designed for low distortion and large bandwidth. The
demodulator output signal passes an integrated low pass
filter for attenuation of the residual vision carrier and is
fed to the video amplifier. The video amplifier is realized
by an operational amplifier with internal feedback and
8 MHz bandwidth (–3dB). A standard dependent DC
level shift in this stage delivers the same sync level for
positive and negative modulation. An additional noise
clipping is provided. The video signal is fed to VIF–AGC
and to the video output buffer. This amplifier with 6dB
gain offers easy adaption of the sound trap. For nominal
video IF modulation the video output signal at Pin 14 is
2 V (peak to peak value).
Sound IF amplifier and SIF–AGC
The SIF amplifier is nearly identical with the 3–stage VIF
amplifier. Each differential amplifier is gain controlled
by the automatic gain control for the sound IF path (SIF–
AGC). Output signal of the SIF amplifier is applied to the
mixer for FM/NICAM signals and the limiter/
demodulator for AM signals.
The SIF–AGC is related to the average level of AM– or
FM–carrier and controls the SIF amplifier to provide a
constant SIF signal to the AM demodulator and QPS
mixer.
AM demodulator
The alignment–free AM demodulator is realized by a synchronous detector. The modulated SIF signal from the SIF
amplifier output is multiplied in phase with the limited
SIF signal (AM is removed). The AF signal of the
demodulator output is fed to the output amplifier and to
the SIF–AGC. For all TV standards with negative video
Preliminary Information
Rev. A1: 18.08.1995
TDA4471
TELEFUNKEN Semiconductors
modulation (e.g. B/G standard) the AF output signal
(Pin 27) is switched off by the standard switch.
Quasi–Parallel–Sound (QPS) mixer
The QPS mixer is realized by a multiplier. The SIF signal
(FM or NICAM carrier) is converted to the intercarrier
frequency by the regenerated picture carrier (quadrature
signal) which is provided from the VCO. The intercarrier
signal is fed via an output amplifier to Pin 26.
Standard switch
To have equal polarity of the video output signal the polarity can be switched in the demodulation stage in
accordance with the TV standard. Additional a standard
dependent DC level shift in the video amplifier delievers
the same sync level. Parallel the correct VIF–AGC is selected for positive or negative modulated VIF signals. In
case of negative modulation (e.g. B/G standard) the AM
output signal is switched off. If the standard for positive
modulation (L standard) is selected the AM demodulator
and QPS mixer is active. This condition allows a parallel
operation of the AM sound signal and the NICAM–L stereo sound.
L’ switch and VIF input selection
For positive modulated IF signals (L/L’ standard) Pin 16
works as L’ switch. With a control voltage at Pin 16 the
VCO frequency can be switched for setting to the required
L’ value (L’ standard). Also a fine adjustment of the L’–
VCO centre frequency is possible by a potentiometer. The
L’ switch is only active for positive modulated video IF
signals (standard switch in L mode). In this mode the
video IF input 2 (VIF2) is forced by the standard switch.
The possibility to select VIF1 input is given by connecting VIF2 input (pin 10 or 11) via 10 k resistor to ground.
If negative modulation (B/G mode) is selected pin 16 operates as an input selection switch for the two VIF inputs.
AFC switch
The AFC output signal at Pin 24 can be controlled by a
switching voltage at Pin 21. It is possible to select an AFC
output signal with rising– or falling AFC curve and to
switch off the AFC.
Internal voltage stabilizer
The internal bandgap reference ensures constant performance independant of supply voltage and temperature.
Absolute maximum values
Reference point pin 4 (9, 18), unless otherwise specified
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Parameters
Supply voltage
Supply current
Power dissipation, Vs = + 9 V
Output currents
External voltages
Junction temperature
Storage temperature
Electrostatic handling *)
Pin 25
Pin 25
Pin 14, 26, 27
Pins 1, 2, 5–8, 10–12,
14, 16, 19, 20, 26–28
Pins 17, 22, 23
Pins 13
Pins 15, 21, 24
All pins
Symbol
VS
IS
P
Iout
Vext
Value
9.0
85
765
5
+ 4.5
Unit
V
mA
mW
mA
V
Tj
Tstg
VESD
+ 3.5
+ 13.5
Vs
+125
–25 to +125
300
V
V
V
°C
°C
V
*) Equivalent to discharging a 200 pF capacitor through a 0 resistor
Operating Range
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Parameters
Supply voltage range25
Ambient temperature
Rev. A1: 18.08.1995
Symbol
VS
Tamb
Preliminary Information
Value
4.5 to 9.0
0 to +85
Unit
V
°C
5 (16)
TDA4471
TELEFUNKEN Semiconductors
Thermal Resistance
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Parameters
Thermal resistance:
junction–ambient when soldered to PCB
Symbol
RthJA
Value
55
Unit
K/W
Electrical Characteristics
Vs = +5V, Tamb = +25°C; reference point Pin 4 (9, 18), unless otherwise specified
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Parameters
Test Conditions / Pins
Symbol
DC–supply
Pin 25
Supply voltage
Supply current:
VIF–inputs
Input sensitivity, RMS
value
Input impedance
Input capacitance
VIF–AGC
IF gain control range
AGC capacitor at pin 8
Black level capacitor at pin
17
Tuner–AGC
Available tuner–AGC current
Allowable output voltage
IF slip – tuner AGC
VS
IS
Pin 6–7, 10–11
vin
IF input signal for minimum
take over point
IF input signal for maximum
take over point
Variation of the take over
point
by temperature
FPLL and VCO
Max. oscillator frequency
Vision carrier capture range
Oscillator drift (free runing) as function of temperature
6 (16)
for FPLL locked
see note 1
see note 1
Min.
Typ.
Max.
Unit
4.5
5.0
75
9.0
85
V
mA
80
120
µV
Rin
Cin
1.2
2
k
pF
60
65
2.2
100
dB
µF
nF
1
2
4
mA
8
13.5
10
V
dB
4
mV
Pin 8, 17
Gv
CAGC
CBL
Pin 12, 13 see note 2
Itun
Vout
current Itun:
10% to 90%
Rtop = 10 k
(Vtop= 4.5 V)
GIF
Rtop = 0
(Vtop = 0.8 V)
vin
Tamb = 55°C
VIF–AGC: Gv = 46 dB
vin
0.3
vin
Pin 20, 22, 23, 28
for carrier generation
fvco
fvco = 38.9 MHz
fcap
Cvco = 6.8 pF
see note 3
f/T
Tamb = 55°C,
Cvco = 6.8 pF,
fvco = 38.9 MHz
40
mV
2
3
70
1.5
Preliminary Information
dB
MHz
MHz
2
–0.3
%
Rev. A1: 18.08.1995
TDA4471
TELEFUNKEN Semiconductors
Electrical Characteristics
Vs = +5V, Tamb = +25°C; reference point Pin 4 (9, 16), unless otherwise specified
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Parameters
Video output
Output current – source
– sink
Output resistance
Video output signal
Difference of the video
signals
Sync level
Zero carrier level for neg.
modolation
(Ultra white level)
Zero carrier level for pos.
modulation
(Ultra black level)
Supply voltage influence
on the ultra black– and
ultra white level
Video bandwidth (–3dB)
Video frequency response
over the AGC range
Differential gain error
Differential phase error
Intermodulation 1.07MHz
Video signal to noise ratio
Residual vision carrier
fundamental wave
38.9 MHz and second
harmonic 77.8 MHz
Lower limiting level
Upper limiting level
Ripple rejection
Rev. A1: 18.08.1995
Test Conditions / Pins
Pin 14
Symbol
Min.
Typ.
Iout
2
Unit
5
3
100
2.2
10
mA
mA
see note 1
peak to peak value
between B/G and L
vo,vid
V8 = 3 V
Vsync
VDC
1.2
3.4
V
V
V8 = 3 V
VDC
1.15
V
V/V
1
%/V
8
MHz
dB
RL 1 k, CL 50 pF
Rout
vo,vid
Max.
B
1.8
6
2.0
2.0
B
DG
DP
see note 4
weighted , CCIR–567
below sync level
above ultra white level
Pins 25, 14
see note 1
IM
S/N
vres1
52
56
400
600
Vlim1
Vlim2
RR
2
2
60
60
2
35
Preliminary Information
5
5
10
V
%
%
deg
dB
dB
mV
mV
mV
dB
7 (16)
TDA4471
TELEFUNKEN Semiconductors
Electrical Characteristics
Vs = +5V, Tamb = +25°C; reference point Pin 4 (9 ,16), unless otherwise specified
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ÁÁÁÁ
ÁÁÁÁ
ÁÁÁÁÁÁÁÁÁ
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ÁÁÁÁ
ÁÁÁÁ
ÁÁÁÁ
ÁÁÁÁ
ÁÁÁÁ
Parameters
Test Conditions / Pins
Symbol
Standard switch
Pin 15
Control voltage for mode 1: see note 5
note 2
VSW1
neg. modulated video–IF
signals
and FM/NICAM sound
Control voltage for mode 2:
VSW2
pos. modulated video–IF
signals
and AM / L–NICAM sound
Switching current
ISW
AFC output
Pin 24
Control slope
I/f
Frequency drift by
related to the picture carrier
temperature
frequency
Output voltage upper limit
VAFC
lower limit
Output current
IAFC
AFC switch
Pin 21
Control voltage: AFC ”off”
VSW
AFC curve rising
see note 6
AFC curve falling
Switching current
ISW
L’/VIF input selector switch
Pin 16 see note 7
Control voltage:
standard switch in mode 2
VSW2
L’-VCO frequency
(L standard)
L’-VCO frequency
Control voltage:
standard switch in mode 1
VSW1
VIF input 2 active
(B/G standard)
VIF input 1 active
Switching current
VSW = 0
ISW
8 (16)
Min.
Typ.
Max.
Unit
2.0
Vs
V
0
0.8
V
100
A
0.7
A/kHz
0.25
0.6
Vs–0.4
0.4
0.2
0
1.5
3.5
0.8
2.5
Vs
100
%
V
V
mA
V
A
0
3.4
3.0
4.5
V
0
3.4
3.0
4.5
700
V
Preliminary Information
A
Rev. A1: 18.08.1995
TDA4471
TELEFUNKEN Semiconductors
Electrical Characteristics
Vs = +5V, Tamb = +25°C; reference point Pin 4 (9, 18), unless otherwise specified
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ÁÁÁÁ
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ÁÁÁÁ
ÁÁÁÁ
ÁÁÁÁÁÁÁÁÁ
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Parameters
SIF input
Input sensitivity, RMS
value
Input impedance
Input capacitance
SIF – AGC: (pin 5)
IF gain control range
AGC capacitor
Intercarrier output– FM
DC output voltage
Output resistance
Sound IF output voltage,
RMS value
Weighted signal to noise ratio:
(CCIR 468)
Test Conditions / Pins
Symbol
Pin 1–2
output signal: –3dB
vin
see note 1
see note 1
Min.
Rin
Cin
Gv
CAGC
Pin 26 see note 8
VDC
see note 1
Rout
5.5 MHz output voltage
vout
vin = 10 mV
Ref .signal:
vin =10 mV;
FM dev. = 27 kHz
fmod = 1 kHz;
tested with the double FM
demod. U2860B;
B/G modulated IF signal
60
S/N
S/N
S/N
Black screen: Channel 1/2
Grid pattern: Channel 1/2
Grey screen 50%:
Channel 1/2
Ripple rejection
Pins 25, 26
RR
Typ.
Max.
Unit
80
120
V
1.2
2
k
pF
65
10
dB
2
150
300
V
mV
60/58
54/52
60/57
dB
dB
dB
F
35
dB
see note 1
Electrical Characteristics
Vs = +5V, Tamb = +25°C; reference point Pin 4 (9 ,16), unless otherwise specified
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Á
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Á
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Á
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Parameters
AF output – AM
DC output voltage
Output resistance
AF output voltage, RMS
value
Total harmonic distortion
Signal to noise ratio
Ripple rejection
Rev. A1: 18.08.1995
Test Conditions / Pins
Symbol
Pin 27 see note 9
VDC
see note 1
Rout
m = 54 %
voAF
m = 54%
fmod = 1kHz, 12.5kHz
Reference: m = 54%,
fmod = 1 kHz,
22 kHz low pass filter
Pin 25, 27
see note 1
Min.
Typ.
2.2
150
500
THD
1
S/N
65
RR
Max.
28
Preliminary Information
Unit
V
mV
2
%
dB
dB
9 (16)
TDA4471
TELEFUNKEN Semiconductors
Notes:
1.
This parameter is given as an application information and not tested during production.
2.
Adjustment of turn over point (delayed tuner AGC) with external resistor Rtop or external voltage Vtop.
3.
The oscillator drift is related to picture carrier frequency, at external temperature-compensated LC
circuit
4.
(1.07) = 20 log (4.43 MHz component/1.07 MHz component);
(1.07) value related to black–white signal
input signal conditions: picture carrier 0 dB
colour carrier
–6 dB
sound carrier
–24 dB
5.
Without external control voltage at Pin 15 (open circuit) the IC automatically operates in mode :
negative modulated video IF and FM/NICAM sound signals
ÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁ
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ÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁ
Voltage at Pin 15
(standard switch)
Selected standard
(mode)
6.
2.0V – Vs
(or Pin 15 open)
mode 1 (B/G standard)
VIF: neg. modulation
SIF: FM/ NICAM
mode 2 (L standard)
VIF: pos. modulation
SIF: AM + NICAM
Without control voltage at Pin 21 (open circuit) the falling AFC curve is automatically selected
Voltage at Pin 21
(AFC switch)
AFC function
7.
0 – 0.8 V
ÁÁÁÁÁÁÁÁ
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ÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁ
0 – 0.8 V
1.5 – 2.5 V
AFC switched OFF
AFC curve rising
3.5 V – Vs
(or Pin 21 open)
AFC curve falling
Without control voltage at Pin 16 (open circuit) the L’ switch is not active.
St Package
(Dimensions in mm) standard switch, Pin 15
L’/VIF input switch, Pin 16
Ext. voltage at VIF input 2,
Pin 10 or 11
Modulation
Standard
Active VIF input
*) condition not useful
Mode 1: neg. modulation (B/G)
2.0 V – VS
3.4 V – 4.5 V
(or Pin 16 open)
0 – 3.1 V
Mode 2: pos. modulation (L)
0 – 0.8 V
3.4 V – 4.5 V
(or Pin 16 open)
0 – 3.1 V
ÁÁÁÁ
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ÁÁÁ
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ÁÁÁÁ
ÁÁÁ
ÁÁÁÁ
ÁÁÁÁ
ÁÁÁÁ
open
1V
open
1V
open
1V
open
1V
neg.
B/G,...
VIF1
neg.
B/G,...
VIF1
neg.
B/G,...
VIF2
*)
*)
*)
neg.
L
VIF2
neg.
L
VIF1
neg.
L’
VIF2
neg.
L’
VIF1
8.
Picture carrier PC = 38.9 MHz; sound carrier SC1 = 33.4 MHz, SC2 = 33.16 MHz;
PC/SC1 =13 dB; PC/SC2 = 20 dB; PC unmodulated (equivalent to sync peak level)
9.
Sound carrier SC = 32.4 MHz, modulated with fmod = 1 kHz, m = 54 %; vin = 10 mV
10 (16)
Preliminary Information
Rev. A1: 18.08.1995
TDA4471
TELEFUNKEN Semiconductors
Intercarrier
AF
(AM) (FM/NICAM)
AFC
AFC
switch
+VS
Loop
comp.
LVCO
6.8 pF
10 k
n.c.
n.c.
30
29
Loop
filter
150 CRef
CVCO
2.2 F 470 nF
470 nF
28
27
25
26
24
23
22
L’ and
VIF input
switch
Black
level
21
20
19
18
17
16
10
11
12
13
14
15
94 9294
TDA4471
2
1
3
4
5
6
7
8
9
n.c.
10 F
Standard switch
(neg/pos)
AGC (VIF)
AGC (SIF)
SIF 1
10 k
2.2 F
VIF 1
VIF 2
Tuner
delay Tuner Video
AGC
*) External L/C circuit (VCO: 38.9 MHz) with TOKO coil 7KN (9 turns, 0.12mm)
Figure 3. Test circuit
Rev. A1: 18.08.1995
Preliminary Information
11 (16)
12 (16)
from
SAW driver
SAW: VIF
2
1
5
4
3
6
25
10 F
AGC (SIF)
26
27
28
24
10 nF
23
6.8 pF
7
9
22
CVCO
*)
LVCO
+12 V
2.2 F
AGC (VIF)
8
TDA4471
10 nF
22 F
470 nF
10
21
11
20
Loop
filter
150 AFC switch
12
19
CBL
Preliminary Information
Tuner
10 k
13
18
Video
14
17
2.2 F 100 nF
CRef
Standard
switch
S4
15
16
10 k
L’ / VIF input
switch
95 9839
SAW: VIF
SAW: FM
29
30
10 k
Offset
comp.
51 k
AFC
51 k
+5 V
Intercarrier
AF(AM) (FM/NICAM)
TDA4471
TELEFUNKEN Semiconductors
Figure 4. Basic application circuit
Rev. A1: 18.08.1995
TDA4471
TELEFUNKEN Semiconductors
Internal Pin Configuration
94 8525
1
2
2 k
8
2 k
3V
20 k
95 9835
Figure 5.
Sound IF inputs (Pin1–2)
Figure 8.
VIF–AGC time constant (Pin 8)
+ 3.5 V
12
900 7 k
14 k
5
7 k
95 9832
94 8523
Figure 6.
SIF–AGC time constant (Pin 5)
Figure 9.
Tuner AGC – take over point (Pin 12)
95 9817
6
13
7
2 k
2 k
2.3 V
4.2 V
Figure 10.
Tuner AGC – output (Pin 13)
95 9831
Figure 7.
Video IF input (Pin 6–7)
Rev. A1: 18.08.1995
Preliminary Information
13 (16)
TDA4471
TELEFUNKEN Semiconductors
19
14
3.5 V
2.6 mA
95 9822
95 9818
Figure 11.
Video output (Pin 14)
Figure 15.
Internal reference voltage (Pin 19)
3.5 V
20
17 k
15.5 k
15
23 k
2.75 V
95 9819
95 9823
Loop filter (Pin 20)
Figure 16.
Standard switch (Pin 15)
Figure 12.
3.5 V
3.5 V
5 k
30 k
16
3.2 V
21
500 10.5 k
95 9824
95
9820
Figure 13.
Figure 17.
AFC switch (Pin 21)
L’/VIF input switch (Pin 16)
7 k
22
2.7 V
7 k
23
5 k
95 9825
Figure 18.
17
VCO (Pin 22–23)
95 9821
Figure 14.
14 (16)
Black level capacitor (Pin 17)
Preliminary Information
Rev. A1: 18.08.1995
TDA4471
TELEFUNKEN Semiconductors
27 100 24
1.4 mA
95 9828
95 9826
Figure 19.
AFC output (Pin 24)
Figure 21.
AF–AM output (Pin 27)
3.5 V
95 9829
10 k
10 k
28
100 26
Figure 22.
VCO offset compensation (Pin 28)
1 mA
95 9827
Figure 20.
Intercarrier output (Pin 26)
Dimensions in mm
Package: SDIP30
94 9183
Rev. A1: 18.08.1995
Preliminary Information
15 (16)
TDA4471
TELEFUNKEN Semiconductors
Ozone Depleting Substances Policy Statement
It is the policy of TEMIC TELEFUNKEN microelectronic GmbH to
1. Meet all present and future national and international statutory requirements.
2. Regularly and continuously improve the performance of our products, processes, distribution and operating systems
with respect to their impact on the health and safety of our employees and the public, as well as their impact on
the environment.
It is particular concern to control or eliminate releases of those substances into the atmosphere which are known as
ozone depleting substances ( ODSs).
The Montreal Protocol ( 1987) and its London Amendments ( 1990) intend to severely restrict the use of ODSs and
forbid their use within the next ten years. Various national and international initiatives are pressing for an earlier ban
on these substances.
TEMIC TELEFUNKEN microelectronic GmbH semiconductor division has been able to use its policy of
continuous improvements to eliminate the use of ODSs listed in the following documents.
1. Annex A, B and list of transitional substances of the Montreal Protocol and the London Amendments respectively
2 . Class I and II ozone depleting substances in the Clean Air Act Amendments of 1990 by the Environmental
Protection Agency ( EPA) in the USA
3. Council Decision 88/540/EEC and 91/690/EEC Annex A, B and C ( transitional substances ) respectively.
TEMIC can certify that our semiconductors are not manufactured with ozone depleting substances and do not contain
such substances.
We reserve the right to make changes to improve technical design and may do so without further notice.
Parameters can vary in different applications. All operating parameters must be validated for each customer
application by the customer. Should the buyer use TEMIC products for any unintended or unauthorized
application, the buyer shall indemnify TEMIC against all claims, costs, damages, and expenses, arising out of,
directly or indirectly, any claim of personal damage, injury or death associated with such unintended or
unauthorized use.
TEMIC TELEFUNKEN microelectronic GmbH, P.O.B. 3535, D-74025 Heilbronn, Germany
Telephone: 49 ( 0 ) 7131 67 2831, Fax number: 49 ( 0 ) 7131 67 2423
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Preliminary Information
Rev. A1: 18.08.1995