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Part: CXA1846AN
Category:
Description: Electronic Volume Control
Company: Sony Electronics
Datasheet: Download CXA1846AN datasheet File size : 421 kB
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CXA1846AM/AN
Electronic volume control For the availability of this product, please contact the sales office.
Description T h e 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 CXA1846AM 20 pin SOP (Plastic) CXA1846AN 20 pin SSOP (Plastic)
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 350 (75°C) mW PD SOP SSOP 220 (75°C) mW Recommended Supply Voltage Range Supply voltage VCC 6 to 12
V
Block Diagram and Pin Configuration
INAO1 VRIN1 VCT1 INN1 OUT1 INP1 GND VCT NC VCC
11 100k
20
19
18
17
16
15
14
13
12
100k
VOLUME 8dB STEP VOLUME 1dB STEP
VCTBUFF
LATCH
LATCH CONTROL
ZCDET
SHIFT REGISTER
50K
VOLUME 8dB STEP VOLUME 1dB STEP
1
2
3
4
5
6
7
8
VCTBUFF
9
VCTBUFF
10
50K
INAO2
VRIN2
DATA
INN2
VCT2
INP2
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--
OUT2
CLK
INIT
CE
E97102B8Y
CXA1846AM/AN
Pin Description Pin No. Symbol I/O resistance voltage Equivalent circuit
VCC
Description
1 20
INP2 INP1
50k VCT
129 1 20
Input operational amplifier positive phase input
GND VCC
2 19
INN2 INN1
-- VCT
129 2 19
Input operational amplifier reversed phase input
GND VCC
3 18
VCT2 VCT1
-- VCT
3 18
VCT buffer output
GND VCC
4 17
INAO2 INAO1
-- VCT
4 17
Input operational amplifier
GND VCC
5 16
VRIN2 VRIN1
8.2k VCT
5 16
Volume input
GND
--2--
CXA1846AM/AN
Pin No.
Symbol
I/O resistance voltage
Equivalent circuit
VCC
Description
6 15
OUT2 OUT1
-- VCT
6
Volume output
GND VCC
7
CE
--
129 7
Latch enable
GND VCC
8
DATA
--
129 8
Serial data input
GND VCC
9
CLK
--
129 9
Serial clock
GND VCC
10
INIT
-- --
129 10
System reset
GND
11 12 13
VCC VCT GND
-- -- VCT -- --
+ power supply Mid-point potential GND
--3--
CXA1846AM/AN
Electrical Characteristics Item Circuit current Total harmonic distortion Output noise voltage Maximum output voltage Separation Maximum attenuation High Input voltage Low Input voltage range Maximum output current Symbol ICC THD Vn Vom CS ATTm Vsh Vsl Vin Imax
(Unless otherwise specified VCC = 8V, Ta = 25°C) Measurement Condition No signal 1kHz, 5dBm Input shorted 1kHz 1kHz Data, INIT CLK, CE Input buffer amplifier output current Min. 5 -- -- 8 85 85 3 0 1 -- Typ. Max. Unit 8 12 mA 0.003 0.01 % 5 7 µVrms -- -- dBm 90 -- dB 90 -- dB -- 6 V -- 1.5 V -- VCC 1 V -- 1 mA
RESET The IC is reset by reducing the voltage at the INIT pin to 1V or less when CLK is high. Reset can not be performed when CLK is low. The table below shows the status when the IC has been reset.
MODE VRC1 VRF1 VRC2 VRF2
Setting 7dB 7dB
--4--
CXA1846AM/AN
Data Allocation Fast bit D1 D2 D3 D4 D5 D6 D7 D8 D9 D10 D11 D12 D13 D14 D15 D16 NOP MSB
VRC1
VRF1 NOP
VRC2
VRF2 LSB
VRC1/VRC2 Setting 0 8 16 24 32 40 48 56 64 72 80 VRF1/VRF2 Setting 0 1 2 3 4 5 6 7 D6/D14 1 1 1 1 0 0 0 0 D7/D15 1 1 0 0 1 1 0 0 D8/D16 1 0 1 0 1 0 1 0 --5-- D2/D10 1 1 1 1 1 1 1 1 0 0 0 0 0 D3/D11 1 1 1 1 0 0 0 0 1 1 1 1 0 D4/D12 1 1 0 0 1 1 0 0 1 1 0 0 0 D5/D13 1 0 1 0 1 0 1 0 1 0 1 0 0
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