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BA3430FS 데이터시트 PDF




ROHM Semiconductor에서 제조한 전자 부품 BA3430FS은 전자 산업 및 응용 분야에서
광범위하게 사용되는 반도체 소자입니다.


 

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부품번호 BA3430FS 기능
기능 Stereo pre-amplifiers with mute detection circuits for car stereos
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BA3430FS 데이터시트, 핀배열, 회로
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 de-
signed 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-am-
plifier board into the mechanical components of a car stereo.
FAbsolute maximum ratings (Ta = 25_C)
FRecommended operating conditions (Ta = 25_C)
269




BA3430FS pdf, 반도체, 판매, 대치품
Audio ICs
BA3430S / BA3430F / BA3430FS
FElectrical characteristics (unless otherwise noted, Ta = 25_C and VCC = 9V, f = 1kHz, Rg = 680, VO = *10dBV)
272

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BA3430FS 전자부품, 판매, 대치품
Audio ICs
FMute detection circuit
(1) Mute detection based on noise and music signals
The signals of each block in the mute detection circuit are
shown in the diagram below.
BA3430S / BA3430F / BA3430FS
(2) Sensitivity switch amplifier circuit
The noise level and signal frequency of the tape differ
during playback and fast forward. Therefore, this signal
amplifier includes a circuit for switching the detection fre-
quency and gain for playback and fast forward.
(1) Sensitivity switch circuit
This circuit switches the detection frequency and gain for
playback and fast forward.
A 10kor less resistor must be connected to the input pin
to limit the input current. The electrolytic capacitor be-
tween the input pin and ground is for preventing incorrect
detection. Without this capacitor, sensitivity switch noise
may cause incorrect detection of songs.
Input switch truth table
2) Input low pass filter
High frequency noise increases during fast forward. This
filter reduces high frequency noise. It consists of an inter-
nal 30kresistor which combines the left and right equal-
izer output and an external capacitor connected to Pin 5.
The cutoff frequency of the low pass filter fH is
1
fH = (Hz)
2 π C 30k / / 30k
C = External capacitor connected to Pin 5
275

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관련 데이터시트

부품번호상세설명 및 기능제조사
BA3430F

Stereo pre-amplifiers with mute detection circuits for car stereos

ROHM Semiconductor
ROHM Semiconductor
BA3430FS

Stereo pre-amplifiers with mute detection circuits for car stereos

ROHM Semiconductor
ROHM Semiconductor

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