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BA7180AS Datasheet

  • BA7180AS

  • 2-channel PRE / REC amplifier with auto-tracking interface

  • 149.74KB

  • 12頁

  • ROHM

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Video ICs
2-channel PRE / REC amplifier with
auto-tracking interface
BA7180AS / BA7180AFS
The BA7180AS and BA7180AFS are PRE / REC amplifiers developed for use in video cassette recorders. They
have been designed for use in two-head decks and feature 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 channel and REC / PB switches on a single monolithic IC.
鈥?/div>
Applications
VCRs
鈥?/div>
Features amplifier has a total gain of 57dB (Typ.),
1) The playback
and has a low-noise preamplifier. Designed for VHS-
band operation with low external parts count.The ICs
have 2 circuits for 2-head VCR applications.
2) Two playback output systems (through output and
AGC output). The AGC output level is 300mV
P-P
(Typ.); suitable for FM brightness signal output.
3) Auto-tracking interface for automated tracking
adjustment. The detector characteristic is non-linear
to improve tracking accuracy during playback of low
signal levels.
4) The recording amplifier uses constant-current BLT
drive that handles load variations (i.e. head imped-
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 sigle 5V power supply, with low
power dissipation.
鈥?/div>
Absolute maximum ratings (Ta = 25擄C)
Parameter
Power supply voltage
Power dissipation
BA7180AS
BA7180AFS
Symbol
V
CC
Pd
Topr
Tstg
Limits
7.0
1000
鈭?/div>
1
937.5
鈭?/div>
2
鈥?20 ~ + 65
鈥?55 ~ + 150
Unit
V
mW
擄C
擄C
Operating temperature
Storage temperature
鈭?/div>
1 Reduced by 10.0mW for each increase in Ta of 1擄C over 25擄C (free air).
鈭?/div>
2 When mounted on a 90mm
脳
90mm, t = 1.6mm glass epoxy board, reduced by 7.5mW for each
increase in Ta of 1擄C over 25擄C.
鈥?/div>
Recommended operating conditions (Ta = 25擄C)
Parameter
Playback / recording
Symbol
V
CC
Min.
4.5
Typ.
5.0
Max.
5.5
Unit
V
1

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    2-channel PRE / REC amplifier with auto-tracking interface
    ROHM
  • 英文版
    2-channel PRE / REC amplifier with auto-tracking interface
    ROHM [Rohm...
  • 英文版
    2-channel PRE / REC amplifier with auto-tracking interface
    ROHM
  • 英文版
    2-channel PRE / REC amplifier with auto-tracking interface
    ROHM [Rohm...
  • 英文版
    2-channel PRE / REC amplifier with auto-tracking interface
    ROHM
  • 英文版
    2-channel PRE / REC amplifier with auto-tracking interface
    ROHM [Rohm...
  • 英文版
    4-channel PRE / REC amplifier with auto-tracking interface
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  • 英文版
    4-channel PRE / REC amplifier with auto-tracking interface
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  • 英文版
    SECAM chroma signal processor for VHS VCRs
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    SECAM chroma signal processor for VHS VCRs
    ROHM [Rohm...

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