Sony CXA1846AN, CXA1846AM Datasheet
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E97102B8Y
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.
Absolute Maximum Ratings (Ta=25 °C)
• Supply voltage VCC 13 V
• Operating temperature Topr –40 to +85 °C
• Storage temperature Tstg –65 to +150 °C
• Allowable power dissipation
PD SOP 350 (75°C) mW
SSOP 220 (75°C) mW
Recommended Supply Voltage Range
Supply voltage VCC 6 to 12 V
Description
The CXA1846AM/AN is an electrical volume
control IC for use in car radios/stereos and radiocassette recorders featuring serial data control. It
has improved over the CXA1846M/N by reducing
the ‘pop’ noise during volume level-switchings.
Features
• Volume adjustment (0dB to –87dB, – ∞dB)
• Balance
• Serial data control (DATA, CLK, CE)
• Single 8V power supply
• Zero-cross detection circuit
Structure
Bipolar silicon monolithic IC
Electronic volume control
CXA1846AM/AN
Block Diagram and Pin Configuration
VOLUME
8dB STEP
VOLUME
1dB STEP
100k 100k
VCTBUFF
LATCH
SHIFT REGISTER
ZCDETLATCH CONTROL
VOLUME
8dB STEP
VOLUME
1dB STEP
VCTBUFF
VCTBUFF
50K
50K
INP1
INN1
VCT1
INAO1
VRIN1
OUT1
NC
GND
VCT
V
CC
INP2
INN2
VCT2
INAO2
VRIN2
OUT2
CE
DATA
CLK
INIT
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
CXA1846AM CXA1846AN
20 pin SOP (Plastic) 20 pin SSOP (Plastic)
For the availability of this product, please contact the sales office.
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CXA1846AM/AN
Pin Description
1
20
2
19
3
18
4
17
5
16
INP2
INP1
INN2
INN1
VCT2
VCT1
INAO2
INAO1
VRIN2
VRIN1
50kΩ
VCT
—
VCT
—
VCT
—
VCT
8.2kΩ
VCT
129
V
CC
GND
20
1
129
V
CC
GND
2
19
VCC
GND
18
3
VCC
GND
4
17
VCC
GND
16
5
Input operational amplifier positive
phase input
Input operational amplifier
reversed phase input
VCT buffer output
Input operational amplifier
Volume input
Pin No. Symbol
I/O resistance
voltage
Equivalent circuit Description
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CXA1846AM/AN
6
15
7
8
9
10
11
12
13
OUT2
OUT1
CE
DATA
CLK
INIT
VCC
VCT
GND
—
VCT
≅ ∞
—
≅ ∞
—
≅ ∞
—
—
—
—
—
VCT
—
—
VCC
GND
6
129
V
CC
GND
7
129
V
CC
GND
8
129
V
CC
GND
9
129
V
CC
GND
10
Volume output
Latch enable
Serial data input
Serial clock
System reset
+ power supply
Mid-point potential
GND
Pin No. Symbol
I/O resistance
voltage
Equivalent circuit Description
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