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BA7182AS 数据表(PDF) 1 Page - Rohm

部件名 BA7182AS
功能描述  2-channel PRE / REC amplifier with auto-tracking interface
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制造商  ROHM [Rohm]
网页  http://www.rohm.com
标志 ROHM - Rohm

BA7182AS 数据表(HTML) 1 Page - Rohm

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1
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.
2) Two playback output systems (throgh output and
AGC output). The AGC output level is 270mVP-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.
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.
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)
Recommended operating conditions (Ta = 25°C)
Parameter
Symbol
Limits
Unit
7.0
V
mW
Topr
°C
Tstg
°C
VCC
1100
Pd
– 20 ~ + 75
– 55 ~ + 125
Applied voltage
Power dissipation
Operating temperature
Storage temperature
Reduced by 11mW for each increase in Ta of 1°C over 25°C (free air).
Parameter
Symbol
Min.
Typ.
Max.
Unit
Conditions
VCC
4.5
5.0
5.5
V
12pin
Playback / recording
Not designed for radiation resistance.


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