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BH3854AS

Rohm
Part Number BH3854AS
Manufacturer Rohm
Description Serial sound controller
Published Mar 23, 2005
Detailed Description Audio ICs Serial sound control IC BH3854AS / BH3854AFS The BH3854AS and BH3854AFS are signal processing ICs designed fo...
Datasheet PDF File BH3854AS PDF File

BH3854AS
BH3854AS

Overview
Audio ICs Serial sound control IC BH3854AS / BH3854AFS The BH3854AS and BH3854AFS are signal processing ICs designed for volume and tone control in CD radio cassettes and other audio products.
Their three-line serial control enables them to control volume and tone on the basis of signals from a microcomputer, etc.
FApplications CD radio cassettes, mini component stereo systems, car stereos FFeatures 1) They facilitate direct serial control from a microcomputer of volume (main volume) 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) Input amp can be used for gain adjustment, and matrix surround yields powerful sound.
4) Stable standard voltage supply and built-in I / O buffer mean that few attachments are needed.
SSOP32 package designed to save space.
FAbsolute maximum ratings (Ta = 25_C) 5) Open collector has four outputs, which makes logic control possible.
6) Excellent for volume and tone control devices in CD radio cassettes, micro components, car stereos, televisions, etc.
7) Digital GND pin and analog GND pin are separated with an impedence of more than 1MΩ.
FRecommended operating conditions (Ta = 25_C) 633 Audio ICs FBlock diagram BH3854AS / BH3854AFS FPin descriptions 634 Audio ICs BH3854AS / BH3854AFS FElectrical characteristics (unless otherwise noted, Ta = 25_C, VCC = 8V, f = 1kHz, BW = 20 X 20kHz, VOL = Max.
, TONE = ALL FLAT, Rg = 600Ω, RL = 10kΩ, INPUT AMP GAIN = 0dB) FTiming chart constants Note: About the output pins.
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SPins 1 through 4 (pins 12 through 15) are reset when the power is turned ON.
SAfter the pins are reset, until the Vcc voltage setting for this IC (BH3854) is reached and the next data Sis input, the pins only operate while the CK, DATA, and LATCH lines are all maintained at LOW.
SBe sure that no more than 9V is applied to any of the output pins.
635 Audio ICs FMeasurement circuit BH3854AS / BH3854AFS 636 Audio ICs FOperat...


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