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BH3856

Rohm
Part Number BH3856
Manufacturer Rohm
Description 2-wire serial sound controller
Published Mar 23, 2005
Detailed Description BH3856S / BH3856FS Audio ICs 2-wire serial sound control IC BH3856S / BH3856FS The BH3856S and BH3856FS are signal proc...
Datasheet PDF File BH3856 PDF File

BH3856
BH3856

Overview
BH3856S / BH3856FS Audio ICs 2-wire serial sound control IC BH3856S / BH3856FS The BH3856S and BH3856FS are signal processing ICs designed for volume and tone control in televisions, mini component stereo systems, and other audio products.
Their two-line serial control (I2C BUS) enables them to control volume and tone on the basis of signals from a microcomputer, etc.
!Applications Televisions, [Video equipped television], personal computer televisions, mini component stereo systems, car stereos.
!Features 1) I2C BUS facilitates direct serial control from a microcomputer of volume (main volume), balance (left / right), and tone (bass, treble).
DC control is also possible.
2) Volume is produced by a low-distortion, low-noise VCA.
Designed to minimize step noise.
3) Stable standard voltage supply and built-in I/O buffer mean that few attachments are needed.
SSOP-A32 package designed to save space.
4) Matrix surround yields powerful sound.
!Absolute maximum ratings (Ta = 25°C) Parameter Power supply voltage Power dissipation Operating temperature Storage temperature BH3856S BH3856FS Symbol Vcc Pd Topr Tstg Limits 10.
0 1200 ∗1 850 ∗2 −40~+85 −55~+150 Unit V mW °C °C ∗1 Reduced by 12mW for each increase in Ta of 1°C over 25°C.
∗2 Reduced by 6.
8mW for each increase in Ta of 1°C over 25°C.
!Recommended operating conditions (Ta = 25°C) Parameter Power supply voltage Symbol VCC Min.
6.
0 Typ.
9 Max.
9.
5 Unit V Note : I2C BUS is a registered trademark of Philips.
BH3856S / BH3856FS Audio ICs !Block diagram BH3856S 30k 30k A_GND IN1 BVN1 BIN1 BVO1 TVN1 TIN1 TVO1 OUT1 VCC SC N.
C.
SDA SCL D_GND 1 − − VCC 30 29 28 FILTER IN2 BVN2 BIN2 BVO2 TVN2 TIN2 TVO2 OUT2 VC1 VC2 TC BC Vref 2 3 47k 47k 4 5.
1k − + + − (Bass) 27 5.
1k (Bass) 5 6 26 Tone Tone Volume Volume 25 (Treble) Matrix surround (Treble) 7 2.
1k 24 2.
1k 8 9 10 VCC 11 200k 23 22 30k 30k − − + Volume Control Volume + 21 20 30k 12 30k 19 18 17 13 14 Reference Voltage 15 SLAVE ADDRESS 16 ...


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