BA7182

更新时间： 2024-11-18 22:27:19

品牌	Logo	应用领域
罗姆 - ROHM		放大器
页数	文件大小	规格书
9页	101K
描述
2-channel PRE / REC amplifier with auto-tracking interface

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BA7182 数据手册

Video ICs

2-channel PRE / REC amplifier with

auto-tracking interface

BA7182AS

The BA7182AS is a PRE / REC amplifier developed for use in video cassette recorders. It has been designed for use

in two-head decks and features built-in FB damping, two preamplifiers, a chroma output amplifier, an FM output

amplifier (with AGC), an envelope detector, a constant-current BTL-drive REC amplifier (with AGC) and built-in chan-

nel and REC / PB switches on a single monolithic IC.

Applications

•

VCRs

Features

•

1) The playback amplifier has a total gain of 59dB

(Typ.), and has a low-noise preamplifier. Designed

for VHS-band operation with low external parts

count. The IC has 2 circuits for 2-head VCR applica-

tions.

4) The recording amplifier uses constant-current BLT

drive that handles load variations (i.e. headimped-

ance) well, and gives stable recording characteris-

tics. A single circuit is provided for 2-head VCR use.

5) Built-in recording level AGC means adjustment of

FM recording current is not necessary.

2) Two playback output systems (throgh output and

AGC output). The AGC output level is 270mV^P-P

(Typ.) ; suitable for FM brightness signal output.

3) Auto-tracking interface for automated tracking

adjustment. An integrate and hold detector is used

to reduce the load on the microcontroller.

6) Head switches for 2-channel PRE / REC system

provided.

7) Operates off a single 5V power supply, with low

power dissipation.

Absolute maximum ratings (Ta = 25°C)

•

Parameter

Symbol

V^CC

Limits

7.0

Unit

Applied voltage

Power dissipation

°C

1100

Operating temperature

Storage temperature

Topr

Tstg

– 20 ~ + 75

– 55 ~ + 125

°C

Reduced by 11mW for each increase in Ta of 1°C over 25°C (free air).

Recommended operating conditions (Ta = 25°C)

•

Parameter

Playback / recording

Symbol

V^CC

Min.

4.5

Typ.

5.0

Max.

5.5

Unit Conditions

12pin

᭺Not designed for radiation resistance.

12 3 4 5 6 7...9

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