BA7745

更新时间： 2024-11-30 22:39:23

品牌	Logo	应用领域
罗姆 - ROHM		振荡器放大器录像机
页数	文件大小	规格书
8页	97K
描述
VCR Hi-Fi audio signal REC / PB amplifier with flying-erase oscillator

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BA7745 数据手册

Video ICs

VCR Hi-Fi audio signal REC / PB

amplifier with flying-erase oscillator

BA7745FS

The BA7745FS has the recording and playback amplifiers required for Hi-Fi VCR signal processing, and also con-

tains a flying-erase oscillator. The recording system uses a constant-current amplifeir with AGC to eliminate the need

to adjust the recording current, and ensure stable operation as the head wears. The IC also features REC MUTE and

OVER REC functions .

The playback system has a high-gain preamplifier, a low-offset head switch, a VCA and an EP-gain amplifier. The

flying-erase oscillator has low 2nd and 3rd harmonic distortion, and when connected to an external driver large out-

put current can be obtained.

A H / L control system eliminates the need for special power supplies for the recording and playback systems. The

IC has low power consumption, and comes in a compact 32-pin SSOP-P package that requires little area on the

PCB. It will improve the reliability and performance of your designs while reducing external component requirements.

Applications

•

VCRs

Features

•

The low-noise playback amplifier has a total gain of

83dB (Typ.). Designed for VHS-bandoperation with

low external parts count. It has two built-in circuits for

Hi-Fi VCR operation.

7) Built-in recording level AGC eliminates the need to

adjust recording current.

8) Built-in low-pass filter limits the input bandwidth of

the recording amplifier.

2) The circuit has been designed to suppress head-

switching noise.

9) Built-in OVER REC recording current amplifier

function and REC MUTE function that stops record-

ing output.

3) Built-in EP / SP gain switching function that boosts

the playback gain by 5dB.

10) Built-in high-frequency oscillator for use with flying

erase function.

4) Built-in VCA for easy playback output adjustment.

5) High-output recording amplifier for audio FM record-

ing.

11) Record / playback switching can be done directly

via the system controller, and consumes litlle

power.

6) Constant-current drive provides stable recording

characteristics when the load (head impedance) is

fluctuating.

12) Possible to construct a high-performance audio

system by pairing this chip with a Hi-Fi-audio signal

processing IC.

12 3 4 5 6 7 8

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与BA7745相关器件

型号	品牌	获取价格	描述	数据表
BA7745FS	ROHM	获取价格	VCR Hi-Fi audio signal REC / PB amplifier with flying-erase oscillator
BA7745FSE1	ROHM	获取价格	Audio Amplifier, 1 Channel(s), 1 Func, PDSO32, SSOP-32
BA7745FSE2	ROHM	获取价格	Audio Amplifier, 1 Channel(s), 1 Func, PDSO32, SSOP-32
BA7745FST1	ROHM	获取价格	1 CHANNEL, AUDIO AMPLIFIER, PDSO32, SSOP-32
BA7745FS-T1	ROHM	获取价格	Audio Amplifier, 2 Channel(s), PDSO32, PLASTIC, SSOP-32
BA7745FST2	ROHM	获取价格	Audio Amplifier, 1 Channel(s), 1 Func, PDSO32, SSOP-32
BA7746	ROHM	获取价格	VCR Hi-Fi audio signal REC / PB amplifier
BA7746FS	ROHM	获取价格	VCR Hi-Fi audio signal REC / PB amplifier
BA7746FSE1	ROHM	获取价格	Audio Amplifier, 1 Channel(s), 1 Func, PDSO24, SSOP-24
BA7746FSE2	ROHM	获取价格	2 CHANNEL, AUDIO AMPLIFIER, PDSO24, SSOP-24

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