CXA2509AQ
Playback Equalizer Amplifier with Music Sensor
Description
The CXA2509AQ is an IC designed for use in car
stereo cassette decks. Functions include playback
equalizer amplifier and music sensor into a single
chip.
Features
• Few external parts
• Small package (40-pin QFP)
• Same pin configuration as for the Dolby B-C type
NR system (CXA2511AQ) and Dolby B type NR
system (CXA2510AQ)
• Playback equalizer amplifier and music sensor into
a single chip
• FORWARD/REVERSE head select switch
• Two-system (TAPE/AUX) input select switch
• Music signal interval detection level can be set by
the external resistors/capacitors (2 modes).
• High-frequency cut-off of the music sensor circuit
can be adjusted by the external capacitance.
40 pin QFP (Plastic)
Structure
Bipolar silicon monolithic IC
Absolute Maximum Ratings
• Supply voltage
VCC
• Operating temperature Topr
• Storage temperature Tstg
• Power dissipation
PD
Operating Condition
Supply voltage
VCC
12
–40 to +85
–65 to +150
430
V
°C
°C
mW
7.8 to 11
V
Applications
• Car stereo cassette decks
• Playback-only cassette decks
Sony reserves the right to change products and specifications without prior notice. This information does not convey any license by
any implication or otherwise under any patents or other right. Application circuits shown, if any, are typical examples illustrating the
operation of the devices. Sony cannot assume responsibility for any problems arising out of the use of these circuits.
–1–
E96826-PS
CXA2509AQ
PBEQ2
PBOUT2
GND
TAPEIN2
AUXIN2
DIREF
LINEOUT2
NC
NC
MSSW
Block Diagram and Pin Configuration
30
29
28
27
26
25
24
23
22
21
24dB
PBFB2 31
20 MSMODE
120µ/70µ
PBRIN2 32
×1
19 DRSW
T2
MS MODE
NR BIAS
PBREF2 33
18 TAPESW
F2
TAPE/AUX
PBFIN2 34
17 INSW
TAPE EQ
VCT 35
16 NC
VCT
FWD/RVS
PBGND 36
15 NC
VCC
LPF
PBFIN1 37
DET
MS ON/
OFF
14 MSOUT
F1
PBREF1 38
×1
F3
13 DGND
T1
PBRIN1 39
12 MSTC
PBFB1 40
120µ/70µ
11 G1FB
1
2
3
4
5
6
7
8
9
10
PBEQ1
PBOUT1
VCC
TAPEIN1
AUXIN1
MSLPF
LINEOUT1
NC
NC
G2FB
24dB
–2–
CXA2509AQ
Pin Description
Pin
No.
Symbol
(Ta = 25°C, VCC = 8.0V, DVCC = 5.0V)
Typical pin voltage
DC
AC
I/O
I/O
resistance
Equivalent circuit
Description
Vcc
40k
1
30
PBEQ1
PBEQ2
1k
4.0V
—
O
—
Resistance for
selecting the
playback equalizer
amplifier time
constant
5k
1
1k
30
GND
Vcc
2
29
PBOUT1
PBOUT2
Playback
equalizer amplifier
output
200
4.0V
–25dBm O
—
2
29
200
GND
3
VCC
8.0V
—
—
—
Power supply
Vcc
4
27
TAPEIN1
TAPEIN2
TAPE input
4.0V
–30dBm
4
I
40kΩ
5
5
26
147
20p
27
AUXIN1
AUXIN2
40k
26
External input
VGS
GND
Vcc
100k
6
MSLPF
4.0V
—
—
100kΩ
Cut-off frequency
adjustment of the
music sensor LPF
6
147
64p
GND
–3–
CXA2509AQ
Pin
No.
Symbol
Typical pin voltage
DC
I/O
AC
I/O
resistance
Equivalent circuit
Description
Vcc
7
24
LINEOUT1
LINEOUT2
4.0V
–6dBm
O
200
147
—
Line output
7
22.5k
200
24
GND
Vcc
10
11
G2FB
G1FB
Music signal
interval detection
level setting
500
4.0V
—
—
—
147
10
500
11
GND
Vcc
12
MSTC
—
—
—
147
—
Time constant for
detecting the
music signal
interval
853
12
10k
DGND
GND
13
DGND
0.0V
—
—
Logic ground
(Connect to GND.)
—
Vcc
14
MSOUT
0.2V
when a
signal is
detected;
DVcc
when no
signal is
detected
DVcc
100k
—
O
—
Music sensor
output
14
DGND
–4–
GND
CXA2509AQ
Pin
No.
17
18
Symbol
Typical pin voltage
DC
I/O
AC
I/O
resistance
Equivalent circuit
Vcc
INSW
TAPESW
Description
0.0V
when
open
17
—
I
100kΩ
Playback equalizer
amplifier control
Low (open): 120µs
High: 70µs
1.1k
18
19
100k
DGND
19
DRSW
Line amplifier input
select control
Low (open): TAPEIN
High: AUXIN
GND
Head select control
Low (open):
FORWARD
High: REVERSE
Vcc
20
MSMODE
0.0V
when
open
Music sensor
mode control
Low (open): G1
High : G2
1.1k
—
I
100kΩ
20
100k
DGND
GND
Vcc
21
MSSW
0.0V
when
open
Music sensor
control
Low (open): MS ON
High: MS OFF
1.1k
—
I
100kΩ
21
100k
DGND
GND
–5–
CXA2509AQ
Pin
No.
Symbol
Typical pin voltage
DC
I/O
AC
I/O
resistance
Equivalent circuit
Description
Vcc
25
DIREF
1.2V
—
—
Resistance for
setting the
reference current
(Connects
20 (18) kΩ
between DIREF
pin and GND for
the standard
setting.)
147
—
25
GND
28
GND
0.0V
—
—
—
Ground
31
40
PBFB2
PBFB1
4.0V
–70dBm
I
—
Playback
equalizer amplifier
feedback
32
39
PBRIN2
PBRIN1
Vcc
32
4.0V
34
37
31
39
34
–70dBm
I
—
50p
50p
40
Playback
equalizer amplifier
input (REVERSE
head connected)
36
PBREF
PBREF
Playback
equalizer amplifier
input (FORWARD
head connected)
GND
PBFIN2
PBFIN1
Vcc
33
38
PBREF2
PBREF1
Playback
equalizer amplifier
reference (VCC/2
output)
200
4.0V
—
O
—
33
38
200
GND
–6–
CXA2509AQ
Pin
No.
Symbol
Typical pin voltage
DC
I/O
AC
I/O
resistance
Equivalent circuit
Description
Vcc
30k
147
35
VCT
4.0V
—
O
—
×1
35
VGS
Center (VCC/2
output)
45k
30k
GND
36
PBGND
8
9
15
16
22
23
NC
0.0V
—
—
—
Playback
equalizer amplifier
ground (Connect
to ground.)
—
—
—
—
No connected
–7–
CXA2509AQ
Electrical Characteristics
Item
(Ta = 25°C, VCC = 8.0V, DVCC = 5.0V)
Symbol
Operating voltage
Vopr
Current consumption
ICC
Measurement conditions
No signal, TAPE, 120µs, MS ON
Min.
Typ.
Max.
Unit
7.8
8.0
11.0
V
5.3
7.8
10.3
mA
Line Amplifier (0dB = Line amplifier reference output level LINEOUT of –6dBm)
TAPEIN input sensitivity
VTIN
TAPEIN 1kHz, LINEOUT 0dB
–32.0 –30.0 –28.0 dBm
AUXIN input sensitivity
VAUX
AUXIN 1kHz, LINEOUT 0dB
–32.0 –30.0 –28.0 dBm
Total harmonic distortion
THD1
TAPEIN 1kHz –20dBm, RL = 2.7kΩ
S/N ratio
SN1
Signal handling
—
0.01
0.2
%
No signal, Rg = 5.1kΩ,
CCIR/ARM filter used
74.0
79.4
—
dB
SH1
TAPEIN 1kHz, RL = 2.7kΩ, THD = 1%
13.0
14.4
—
dB
Crosstalk between
channels 1
CT1
TAPEIN 1kHz –24dBm, 1kHz BPF used
—
–86.0 –70.0
dB
Crosstalk between
channels 2
CT2
AUXIN 1kHz –24dBm, 1kHz BPF used
—
–86.0 –70.0
dB
Crosstalk between
TAPE and AUX
CT3
TAPE (AUX) IN 1kHz –24dBm,
AUX (TAPE) mode, 1kHz BPF used∗1
—
–67.0 –65.0
dB
Output DC offset voltage
VOS1
No signal, NR OFF, difference from VCT
–0.1
Playback equalizer amplifier
PBREF
reference output level
PBIN 315Hz –70dBm, 120µs mode
–27.0 –25.0 –23.0 dBm
Playback equalizer amplifier
F120
frequency response 1
PBIN 2.7kHz –58.5dBm,
120µs mode at 315Hz
–1.5
0.0
1.5
dB
Playback equalizer amplifier
F70
frequency response 2
PBIN 4.5kHz –53.8dBm,
70µs mode at 315Hz
–1.5
0.0
1.5
dB
–10.0
–3.0
—
dBm
0.0
0.1
V
Playback Equalizer Amplifier
Signal handling
SH2
PBIN 1kHz, 120µs mode, RL = 2.7kΩ,
THD = 1%
Total harmonic
distortion
THD2
PBIN 1kHz –52dBm, 120µs mode,
RL = 2.7kΩ
—
0.07
0.5
%
S/N ratio
SN2
No signal, 70µs mode, Rg = 680Ω,
CCIR/ARM filter used
59.0
64.5
—
dB
Output DC offset
voltage
VOS2
No signal, 120µs mode, Rg = 680Ω,
difference from VCT
–1.0
0.0
1.0
V
Crosstalk between
channels
CT4
PBIN 1kHz –52dBm, 120µs mode,
1kHz BPF used
—
–81.0 –70.0
dB
Crosstalk between
CT5
FORWARD and REVERSE
PBIN 1kHz –52dBm, 120µs mode,
1kHz BPF used
—
–80.0 –70.0
dB
–8–
CXA2509AQ
Item
Symbol
Measurement conditions
Min.
Typ.
Max.
Unit
Music Sensor
Signal detection level 1
VMS1
TAPEIN 5kHz, MS ON, G1 mode,
external constant of 39kΩ and 0.0047µF
–43.0 –40.0
–37.0 dBm
Signal detection level 2
VMS2
TAPEIN 5kHz, MS ON, G2 mode,
external constant of 3.9kΩ and 0.47µF
–63.0 –60.0
–57.0 dBm
MS output leak current
IOH
No signal, MS OFF, G1 mode
—
0.0
1.0
µA
MS output saturation
voltage
VOL
TAPEIN 5kHz –30dBm, MS ON,
G1 mode, 1mA applied to MSOUT pin
—
0.3
1.0
V
Low level
VIL
Input voltage of INSW, TAPESW, DRSW,
MSMODE, MSSW
0.0
—
0.5
V
High level
VIH
Input voltage of INSW, TAPESW, DRSW,
MSMODE, MSSW
2.5
—
DVCC
V
Logic Voltage
∗1 The crosstalk between TAPE and AUX is measured with a 5.1kΩ external resistor connected to AUXIN1
(Pin 5). In this condition, the crosstalk is approximately –67dB due to the signal leak from MSLPF (Pin 6).
In order to improve the crosstalk between TAPE and AUX, AUXIN1 pin should be driven with a low
impedance.
–9–
CXA2509AQ
Electrical Characteristics Measurement Circuit
S4
S3
C4 ∗R8
2.2µ 680
26
25
24
23
22
GND
TAPEIN2
AUXIN2
DIREF
LINEOUT2
NC
NC
DRSW 19
TAPESW 18
INSW 17
35 VCT
NC 16
36 PBGND
NC 15
“A” WTG
S28
TAPESW
H/L
INSW
H/L
DIN Audio
S27
S26
+20dB
DVCC
R30
10k S18
CCIR/ARM
∗ R6
680
S25
DGND 13
38 PBREF1
+20dB
C20
0.1µ
MSTC 12
LINEOUT1
NC
G2FB
8
9
10
R20 2.7k
NC
MSLPF
6
7
C15 C16
270p 2.2µ
AC
Voltmeter
R25
1MEG
G1FB 11
∗ R22
3.9k
∗ R23
39k
C18
0.47µ
C19
4.7n
Distortion
Analyzer
Oscilloscope
S12
C13
1µ
∗R17 5.1k
5
4
C11
1µ
S11
3
C8
2.2µ
AUXIN1
2
TAPEIN1
1
S8∗R15 5.1k
∗ R11
18k
S7
∗ R5
12k
∗ R13 2.7k
∗ R1
300k
C10 22µ
40 PBFB1
C6
0.01µ
VCC
39 PBRIN1
PBEQ1
DC Ammeter A
∗R2
270
OFF: 0dB
ON: 30dB
S29
DRSW
H/L
MSOUT 14
37 PBFIN1
PBOUT1
S1
S24
MSMODE
H/L
R24
100k
∗R7
680
C1
2.2µ
∗ R36
50k
1kHz BPF
C2
2.2µ
S5
S2
DC
Voltmeter
GND GND
MSMODE 20
C3
22µ
GND
S19
21
MSSW
27
34 PBFIN2
VCC
S20
R31 10k
S13
28
32 PBRIN2
∗R9
680
33 PBREF2
Power
Supply
S21
R32 100
R21 2.7k
R18 5.1k
29
31 PBFB2
S22
R33 10k
MSSW
H/L
PBEQ2
C5
2.2µ
∗
C17
2.2µ
30
C7
0.01µ
∗ R3
270
∗
∗
C14 ∗R19
1µ
20k
C12
1µ
C9
2.2µ
S23
0dB or 30dB
Amp
PBOUT2
∗R4
300k
Audio
SG
R16 5.1k S10
∗ R10 ∗ R12
12k 18k
S8
S6
∗R14
2.7k
R35 10k
R34 100
Note
R29 10k
S17
R28 100
S16
R27 10k
S15
R26 100
S14
1. Resistor tolerance
2. Capacitor tolerance
Coupling Capacitor
– 10 –
±5%
∗: ±1%
±5%
∗: ±2%
±10%
CXA2509AQ
Application Circuit 1
PBFB2
RVS2
R6
180
R4
100k
PBRIN2
PBREF2
29
R15
20k
C15
2.2µ
DIREF
LINEOUT2
26
27
28
25
C17
0.1µ
23
24
MSSW
C12
2.2µ
TAPEIN2
GND
PBEQ2
30
C4
470p
C10
2.2µ
PBOUT2
R9
18k
AUXIN2
R11
12k
C7
0.01µ
LINEOUT2
GND
NC
AUXIN2
NC
GND
R12 R14
300k 33k
22
21
24dB
31
20
120µ/70µ
19
32
T2
×1
MSMODE
From
Microcomputer
DRSW
MS MODE
NR BIAS
33
18
TAPESW
F2
PBFB1
37
DET
MS ON/
OFF
14
F1
38
F3
×1
13
T1
39
12
40
120µ/70µ
R8
18k
C6
0.01µ
2
PBOUT1
PBEQ1
1
R10
12k
5
4
3
6
R7 R13
300k 33k
AUXIN1
9
8
7
C11 C13 C14
2.2µ 0.001µ 2.2µ
C9
2.2µ
VCC
11
24dB
GND
LINEOUT1
INSW
NC
NC
R19
MSOUT 100k
DGND
MSTC
G1FB
DVCC
To Microcomputer
DGND
C18
0.1µ
GND
R18
1MEG
10
G2FB
PBRIN1
LPF
NC
R5
180
15
VCC
MSLPF
C1
470p
FWD/RVS
36
AUXIN1
PBREF1
RVS1
16
TAPEIN1
PBFIN1
FWD1
R1
100k
TAPE EQ
35
VCT
PBGND
17
NC
VCT
TAPE/AUX
VCC
C3 R3
470p 100k
GND
C5
22µ
GND
C2 R2
470p 100k
34
LINEOUT1
PBFIN2
FWD2
R16
3.9k
R17
39k
C16
0.47µ
C17
4.7n
GND
GND
C8
22µ
GND
Application circuits shown are typical examples illustrating the operation of the devices. Sony cannot assume responsibility for
any problems arising out of the use of these circuits or for any infringement of third party patent and other right due to same.
– 11 –
CXA2509AQ
Application Circuit 2
30
PBFB2
R1 100k
PBREF2
RVS1
PBGND
PBFIN1
R3
100k
PBREF1
R4 100k
PBRIN1
C4
470p R6
500
MSSW
LINEOUT2
AUXIN2
NC
20
120µ/70µ
19
32
T2
×1
MSMODE
From
Microcomputer
DRSW
MS MODE
NR BIAS
33
18
TAPESW
PBFB1
TAPE/AUX
34
17
TAPE EQ
35
16
VCT
FWD/RVS
36
15
VCC
LPF
37
DET
MS ON/
OFF
14
F1
38
F3
×1
13
T1
39
12
40
120µ/70µ
R8
18k
C6
0.01µ
2
PBOUT1
PBEQ1
1
R10
12k
5
4
3
6
R7
300k
C8
22µ
AUXIN1
9
8
7
C11 C13 C14
2.2µ 0.001µ 2.2µ
C9
2.2µ
VCC
11
24dB
GND
LINEOUT1
INSW
NC
NC
R17
MSOUT 100k
DGND
MSTC
G1FB
DVCC
To Microcomputer
DGND
C18
0.1µ
GND
R16
1MEG
10
G2FB
FWD1
21
24dB
31
NC
C3
470p
22
F2
PBFIN2
VCT
C5
22µ
23
24
NC
GND
25
LINEOUT1
C2
470p
GND
C15
2.2µ
MSLPF
FWD2
26
27
28
R13
20k
AUXIN1
R2
100k
C12
2.2µ
TAPEIN1
RVS2
PBRIN2
29
VCC
C1
470p
R5
500
GND
PBEQ2
PBOUT2
R9
18k
C10
2.2µ
DIREF
R11
12k
TAPEIN2
C7
0.01µ
LINEOUT2
GND
NC
AUXIN2
GND
R12
300k
R14
3.9k
R15
39k
C16
0.47µ
C17
4.7n
GND
GND
GND
Application circuits shown are typical examples illustrating the operation of the devices. Sony cannot assume responsibility for
any problems arising out of the use of these circuits or for any infringement of third party patent and other right due to same.
– 12 –
CXA2509AQ
Description of Operation
1. Signal route
24dB
PB IN
FWD
TAPE
AUX
AMP1
RVS
24dB
AMP2
70µs
PBFB
PBEQ PBOUT TAPEIN AUXIN
(–30dBm)
LINEOUT
(–6dBm line amplifier reference output level)
Fig. 1. Signal route block diagram
AMP1 and AMP2 are operational amplifiers. AMP1 composes the playback equalizer amplifier by attaching an
external resistor and capacitor to PBFB, PBEQ and PBOUT pins.
AMP2 is an input selector and a line amplifier. The gain is 24dB.
The line amplifier reference output level is –6dBm.
– 13 –
CXA2509AQ
2. Adjustment method
0
–6dBm
(Dolby level)
–10
–20
LINEOUT
–30dBm
–30
–30dBm
–40
PBOUT
–50
TAPEIN
AUXIN
VR adjustment
–60
–70
400Hz 200nWb/m: Dolby level reference tape
–80
(dBm)
PBIN (HEAD)
Fig. 2-1. Level diagram (application circuit 1)
0
–10
–6dBm
(Dolby level)
PBOUT
–20
VR adjustment
LINEOUT
–30dBm
–30
–30dBm
–40
TAPEIN
AUXIN
–50
–60
–70
400Hz 200nWb/m: Dolby level reference tape
–80
(dBm)
PBIN (HEAD)
Fig. 2-2. Level diagram (application circuit 2)
As an example of the playback equalizer gain adjustment method, the reference tape for Dolby level
adjustment is playd back in order to obtain –6dBm output on LINEOUT (Pins 7 and 24).
The same output level as for ICs with the built-in Dolby NR system(CXA2510AQ and CXA2511AQ) can be
obtained.
List of Calibration Cassette Tape
Dolby level is defined as 200nWb/m measured according to the ANSI high efficiency head method.
The followings are the reference tapes specified by Dolby Laboratories Licensing Corporation.
1. A-bex Laboratories, Inc. (part no. TCC-130)
2. BASF (product code 09797 XE)
3. Kaneon Corp. (LC Engineering part no. LCT-7001)
4. Standard Tape Laboratory (catalogue no. 28)
5. TEAC Corporation, Japan (part no. MTT150)
6. TEAC Corporation of America (part no. MTT150)
7. Victor Company of Japan, Ltd. (part no. TMT-6130, VTT-727)
8. Sony Corporation (part no. TY-256)
– 14 –
CXA2509AQ
3. Playback equalizer amplifier
T1
Gain (dB)
G1
PB IN
FWD
SW1
–6dB/oct
AMP1
RVS
SW2
T2
70µs
PBFB
PBEQ
R4
C1
R1
PBOUT
T3
R3
R2
PBREF
f1
Fig. 3. Playback equalizer amplifier
block diagram
f2
f3
Frequency (Hz)
Fig. 4. Playback equalizer amplifier
frequency response
The CXA2509AQ achieves the frequency response of Fig.4 with the circuit configuration shown in Fig. 3.
Two systems (FORWARD and REVERSE) of playback head input are provided for each channel.
The FORWARD input pin is selected when DRSW (Pin 19) is Low; REVERSE is selected when DRSW is
High.
The playback equalizer amplifier frequency response can be set in two levels.
When TAPESW (Pin 18) is Low, SW2 shown in Fig. 3 is turned OFF; when TAPESW is High, SW2 is turned
ON.
The external resistance R1 should be adjusted to adjust the playback equalizer amplifier gain.
The playback equalizer amplifier frequency response is all determined by the external resistance and
capacitance, and it can be obtained with the following equation.
G (s) =
1 + {s · C1 · (R1 · R2 + R2 · Rx + Rx · R1) / (R1 + R2)}
R1 + R2
·
(s = jω)
1 + s · C1 · (R2 + Rx)
R1
Where, Rx = R3 when TAPESW pin = Low;
Rx = R3//R4 when TAPESW pin = High
Using the above equation, G1 in Fig. 3 and low-frequency time constant (T1) and high-frequency time
constants (T2 and T3) are as follows:
G1 = 20log
R1 + R2
R1
T1 = C1 · (R2 + Rx)
T2, T3 =
C1 · (R1 · R2 + R2 · Rx + Rx · R1)
R1 + R2
– 15 –
CXA2509AQ
4. Music sensor
TAPEIN2
MSLPF
Vcc
DVcc
×1
R3
127k
C1
64p
R2
10k
R11
Vcc
Full-wave
rectifier
MSOUT
Smoother
AMP3
AMP1
R1
10k
R4
100k
AMP2
R5
39.1k
VGS
R6
1k
R7
11.1k
DGND
×1
DGND
TAPEIN1
G1FB
DGND
G2FB
C2
C3
R8
R9
MSTC
R10
C4
Fig. 5. Music sensor block diagram
The signal input from TAPEIN is added and amplified by AMP1.
This signal is then input to the LPF (R4 and C1). The LPF cut-off frequency can be adjusted by connecting the
external capacitance to MSLPF pin. The cut-off frequency is approximately 23kHz when MSLPF pin is left
open.
The detection level and HPF cut-off frequency are determined with the external resistance and capacitance
connected to G1FB or G2FB at AMP2, and the signal is converted to a current.
The signal is full-wave rectified and is converted to a voltage by the internal resistance R5.
The full-wave rectified signal is smoothed. The internal resistance (R6) and external capacitance (C4)
determine the smoothing response time. The recovery time is determined by the external resistance (R10) and
capacitance (C4).
The AMP3 comparator detects whether the smoothed signal is greater or smaller than the comparator
threshold.
The comparator has approximately 2dB hysteresis.
The table below shows the example of the constant and characteristics for the external resistance and
capacitance connected to G1FB and G2FB.
R
C
Music signal detection level
Music signal interval
detection level
Cut-off frequency
FF/REW (G1)
39kΩ 0.0047µF
–39.5dBm
–41.4dBm
870Hz
Playback (G2)
3.9kΩ
–59.5dBm
–61.4dBm
87Hz
0.47µF
Detection level
(dBm)
G1 (FF)
–39.5
G2 (NOR)
–59.5
87 870
Frequency (Hz)
Fig. 6. Music sensor circuit frequency response
– 16 –
CXA2509AQ
5. Operating mode control method
The CXA2509AQ has a playback equalizer amplifier select switch (TAPESW), head input select switch
(DRSW), music sensor mode select switch (MSMODE) and music sensor switch (MSSW).
The operating modes for each switch are shown in the following table.
Pin No.
Pin voltage
Pin name
Low (OPEN)
High
17
INSW
TAPE
AUX
18
TAPESW
120µs
70µs
19
DRSW
PBIN FORWARD
PBIN REVERSE
20
MSMODE
G1
G2
21
MSSW
MS ON
MS OFF
Notes on Operation
1. Playback equalizer amplifier
All playback equalizer amplifier characteristics are determined by the external constants. Use the parts
which satisfies the accuracy required for the playback equalizer amplifier.
2. Music sensor
The current on DIREF (Pin 25), and the resistance and capacitance connected to G2FB (Pin 10) and G1FB
(Pin 11) determine the detection level and the HPF cut-off frequency.
The response time is determined by the resistance and capacitance connected to MSTC (Pin 12).
Use the parts which satisfies the accuracy required for the music sensor.
– 17 –
CXA2509AQ
Example of Representative Characteristics
Current consumption vs. Supply voltage
Current consumption [mA]
Ta = 25°C
8.0
7.5
No input signal
MS ON
7.0
7.0
8.0
9.0
10.0
11.0
Supply voltage [V]
Playback equalizer amplifier frequency response
PBFIN1
Ta = 25°C
60
Gain [dB]
47µ
680
70µs
PBFB1
PBREF
PBEQ1
50
0.01µ
40
18k
12k
120µs
30
VCC = 8.0V
Output level of –25dBm constant
100
1k
70µs
270
Ta = 25°C
Gain [dB]
30
20
VCC = 8.0V
Input: TAPE IN1
AUX IN1
Output: LINE OUT1
1K
2.2µ
Fig. 7. Measurement circuit of playback
equalizer amplifier frequency response
Line amplifier frequency response
100
300k
PBREF
10k
Frequency [Hz]
10
PBOUT1
10K
Frequency [Hz]
– 18 –
CXA2509AQ
Total harmonic distortion (line amplifier)
Total harmonic distortion (playback equalizer amplifier)
100
Total harmonic distortion [%]
Total harmonic distortion [%]
100
Ta = 25°C
VCC = 8.0V
Input: PBFIN1
Output: PBOUT1
RL = 2.7kΩ
10–1
f = 10kHz
10–2
Ta = 25°C
VCC = 8.0V
Input: TAPEIN1
Output: LINEOUT1
RL = 2.7kΩ
0dB = –6dBm
10–1
f = 10kHz
f = 100Hz
10–2
f = 1kHz
–20 –16 –12
–8
–4
0
4
f = 100Hz
f = 1kHz
8
Output level [dBm]
–10
–6
–2
2
6
10
14
Output level [dB]
Ripple rejection ratio (LINEOUT)
–40
–20
Ta = 25°C
VCC = 8.0V
RL = 2.7kΩ
Ripple rejection ratio [dB]
Ripple rejection ratio [dB]
Ripple rejection ratio (PBOUT)
–50
–60
100
1k
10k
–30
–40
–50
100
Frequency [Hz]
Ta = 25°C
VCC = 8.0V
RL = 2.7kΩ
1k
Frequency [Hz]
– 19 –
10k
CXA2509AQ
Crosstalk between channels (1ch → 2ch)
0
Crosstalk [dB]
–20
–40
24dB
VCC = 8.0V
Input: PBFIN1
Output: LINEOUT2
(constant LINEOUT level)
PBFIN1
47µ
680
PBOUT1
–60
PBEQ1
PBREF
–80
TAPEIN1
12k
–100
LINEOUT1
2.2µ
300k
270
–120
100
10k
1k
PBREF
Frequency [Hz]
Fig. 8. Measurement circuit of crosstalk
between channels
Music signal and signal interval detection level
frequency response
Ta = 25°C
VCC = 8.0V
Input: TAPEIN1
G1: R = 39kΩ, C = 4.7nF
G2: R = 3.9kΩ, C = 0.47µF
0
Input level [dBm]
–10
–20
Music signal detection level
–30
G1
–40
–50
Music signal interval detection level
Music signal detection level G2
–60
Music signal interval detection level
100
1k
10k
Frequency [Hz]
HPF connection resistance in MS block vs.
Music signal and signal interval detection level characteristics
Input level [dBm]
–30
Ta = 25°C
VCC = 8.0V
f = 5kHz
Input: TAPEIN1
–40
–50
Music signal
detection level
Music signal interval
detection level
–60
–70
1k
10k
100k
HPF connection resistance [Ω]
– 20 –
CXA2509AQ
Package Outline
Unit: mm
40PIN QFP (PLASTIC)
+ 0.35
1.5 – 0.15
+ 0.1
0.127 – 0.05
9.0 ± 0.4
+ 0.4
7.0 – 0.1
0.1
21
30
20
31
A
11
40
1
+ 0.15
0.3 – 0.1
0.65
10
± 0.12 M
0.5 ± 0.2
(8.0)
+ 0.15
0.1 – 0.1
DETAIL A
PACKAGE STRUCTURE
PACKAGE MATERIAL
EPOXY RESIN
SONY CODE
QFP-40P-L01
LEAD TREATMENT
SOLDER / PALLADIUM
PLATING
EIAJ CODE
QFP040-P-0707
LEAD MATERIAL
42/COPPER ALLOY
PACKAGE MASS
0.2g
JEDEC CODE
NOTE : PALLADIUM PLATING
This product uses S-PdPPF (Sony Spec.-Palladium Pre-Plated Lead Frame).
– 21 –