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BA3430FS

Part Number	BA3430FS
Manufacturer	Rohm
Description	Stereo pre-amplifiers with mute detection circuits for car stereos
Published	Apr 1, 2005
Detailed Description	Audio ICs Stereo pre-amplifiers with mute detection circuits for car stereos BA3430S / BA3430F / BA3430FS The BA3430S, ...
Datasheet	BA3430FS PDF File

Overview

Audio ICs Stereo pre-amplifiers with mute detection circuits for car stereos BA3430S / BA3430F / BA3430FS The BA3430S, BA3430F, and BA3430FS are stereo pre-amplifiers with mute detection circuits which have been designed for use in car stereos.
The analog circuitry including the pre-amplifier and mute detection and the digital circuitry such as control logic circuits have been combined together on a single chip.
This has made it possible to reduce the interface with the microcontroller to five parallel inputs and outputs, and enables a very compact circuit configuration around the tape head.
The BA3430S, BA3430F, or BA3430FS makes it possible to easily incorporate an ultra-compact, high-precision pre-amplifier board into the mechanical components of a car stereo.
FAbsolute maximum ratings (Ta = 25_C) FRecommended operating conditions (Ta = 25_C) 269 Audio ICs FBlock diagram BA3430S / BA3430F / BA3430FS 270 Audio ICs FPin descriptions BA3430S / BA3430F / BA3430FS 271 Audio ICs BA3430S / BA3430F / BA3430FS FElectrical characteristics (unless otherwise noted, Ta = 25_C and VCC = 9V, f = 1kHz, Rg = 680Ω, VO = *10dBV) 272 Audio ICs FMeasurement circuit BA3430S / BA3430F / BA3430FS FAudio signal amplification circuit (1) Input switch circuit This circuit switches between head A and head B as needed for the auto reverse function.
A 10kΩ or less resistor must be connected to the input pin to limit the input current.
Equivalent circuit schematic The electrolytic capacitor between the input pin and ground is for preventing switch noise.
Although it is possible to prevent switch noise in the audio output without this capacitor by using the mute circuit, switch noise in the mute detection circuit will not be prevented and noise will be recognized as a song.
Truth table 273 Audio ICs (2) Equalizer amplifier and metal switch circuits The signal input from the magnetic head will be amplified based on the NAB characteristics for normal tape or metal tape.
The equ...

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