Sony CXA2022S Datasheet
– 1 –
CXA2022S
30 pin SDIP (Plastic)
E95Y17A7X
I2C Bus Sound Processor for TV
Description
The CXA2022S is a bipolar IC designed as an I2C
bus control sound processor for TV. This IC has
simulate stereo, surround, tone control, balance,
volume, muting, AGC and other functions.
Features
• Allows control by I2C bus
• Employs a special surround system to prevent
"vocal missing" in the surround mode
• Adopts an AGC circuit to absorb the difference in
sound level between input sources and improves
S/N ratio of hearing characteristics
Absolute Maximum Ratings
• Supply voltage VCC 14 V
• Operating temperature Topr –20 to +75 °C
• Storage temperature Tstg –65 to +150 °C
• Allowable power dissipation PD 1.25 W
Recommended Operating Condition
Supply voltage 8 to 13 V
Pin Configuration
Structure
Bipolar silicon monolithic IC
Applications
TVs
V
CC
CH L
VRS
MVFO
MVFI
PS3B
CC L
LOUT
PS3A
PS1B
PS2B
PS2A
DET1
R IN
GND
CL R
CH R
BAL
TRE
BASS
VOL
CC R
ROUT
PS1A
DET2
HPF
SCL
SDA
L IN
CL L
2
3
4
5
6
7
8
9
10
11
12
13
14 15
1
26
27
28
29
30
16
17
18
19
20
21
22
23
24
25
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.
– 2 –
CXA2022S
Block Diagram
AGC DET
DAC BUS DEC
21
10
VCC/2
LPF
L IN
R IN
MS/OFF
R
R
SS
MS/OFF
R
R
L-R
SS
PS1
MS
SS
MS
VOCAL-MIX
MIX
SS
MS/OFF
PS3
SS-2
SS-1
TONE VCA
BASS
TRE
VOL
BAL
TONE VCA
R OUT
L OUT
LPF
MS
OFF
SS
M -EFFPS2
EFFECT
HPF
30
13
1
27
28
20
22
23
29
24
25
16
12
26
17
18
19
2
3
4
5
6
7
8
9
11
1415
V
CC
CH L
VRS
MVFO
MVFI
PS3B
CC L
PS3A
PS1B
PS2B
PS2A
DET1
GND
CL R
CH R
BAL
TRE
BASS
VOL
CC R
PS1A
DET2
SCL
SDA
CL L
I
2
C BUS SOUND PROCESSOR
SS
Description of internal switches
MS
…
Monaural Surround
(Simulate Stereo)
SS
…
Stereo Surround 1,2
SS-1
…
Stereo Surround 1
SS-2
…
Stereo Surround 2
OFF
…
Surround OFF
– 3 –
CXA2022S
Pin Description (Ta = 25°C, VCC = 12V)
Pin
No.
Symbol Pin voltage Equivalent circuit Description
130R IN
L IN
6V Input pins.
328CL R
CL L
6V
External pins for LPF
capacitance (BASS).
427CH R
CH L
6V
External pins for HPF
capacitance (TREBLE).
5
6
7
8
BAL
TRE
BASS
VOL
4.5V
DAC output pins.
Connect LPF
capacitance of DAC.
Internal impedance is
approximetely 20kΩ.
2 GND 0V GND
30
1
130 10k
30k
10µ
V
CC
VCC/2
3
28
130
11k
250µ
V
CC
5.4k
11k
250µ
VCC/2
4
27
130
5.7k
250µ
V
CC
6k
5.7k
250µ
75µ
2k
2k
40k
20k
7.5V
5
6
7
8
VCC
– 4 –
CXA2022S
922CC R
CC L
6V
DC-cut pins for L and R.
Internal impedance is
approximately 20kΩ.
1021ROUT
LOUT
6V Output pins.
11
17
18
19
20
23
PS1A
PS2A
PS2B
PS1B
PS3A
PS3B
6V
External capacitance
pins for surround phaseshifter. Internal
impedance is
approximately 18kΩ.
12 DET2
AGC detector output and
control pin.
9
22
500
20k
V
CC
1k
1k
500
1k
20k
10
21
500
130
V
CC
500
84k
5P
11
130
10µ
V
CC
18k
18k
17
18
19
20
23
200
V
CC
200
100k
100k
130
10k
12
Pin
No.
Symbol Pin voltage Equivalent circuit Description
– 5 –
CXA2022S
13 HPF 6V
HPF external capacitance
pin of AGC.
14 SCL I2C bus clock line pin.
15 SDA I2C bus data line pin.
16 DET1 7.8V
AGC detector output pin.
Connect capacitance for
setting time constant.
500
130
500
10µ
10k
13
16k
16k
3k
50µ
11k
4k
100µ
VCC
56k
14
3k
50µ
4.5k
4k
100µ
VCC
56k
15
40k
V
CC
2k
16
Pin
No.
Symbol Pin voltage Equivalent circuit Description
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