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BA7180AFS 데이터시트 PDF




ROHM Semiconductor에서 제조한 전자 부품 BA7180AFS은 전자 산업 및 응용 분야에서
광범위하게 사용되는 반도체 소자입니다.


 

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부품번호 BA7180AFS 기능
기능 2-channel PRE / REC amplifier with auto-tracking interface
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BA7180AFS 데이터시트, 핀배열, 회로
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.
Applications
VCRs
Features
1) The playback amplifier has a total gain of 57dB (Typ.),
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 300mVP-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.
Absolute maximum ratings (Ta = 25°C)
Parameter
Symbol
Limits
Unit
Power supply voltage
BA7180AS
Power dissipation
BA7180AFS
VCC
Pd
7.0
10001
937.52
V
mW
Operating temperature
Topr
– 20 ~ + 65
°C
Storage temperature
Tstg – 55 ~ + 150 °C
1 Reduced by 10.0mW for each increase in Ta of 1°C over 25°C (free air).
2 When mounted on a 90mm × 90mm, t = 1.6mm glass epoxy board, reduced by 7.5mW for each
increase in Ta of 1°C over 25°C.
Recommended operating conditions (Ta = 25°C)
Parameter
Symbol Min. Typ.
Playback / recording
VCC 4.5 5.0
Max.
5.5
Unit
V
1




BA7180AFS pdf, 반도체, 판매, 대치품
Video ICs
BA7180AS / BA7180AFS
Parameter
Symbol Min. Typ. Max. Unit
Conditions (BA7180AS)
Measurement
circuit
Recording system(Pin 11 in Fig. 2 mesurement circuit "L")
Quiescent current
Recording AGC level
AGC control sensitivity
REC amplifier frequency characteristic
2nd harmonic distortion
3rd harmonic distortion
Iq (R) — 72 110 mA No signal
IOAR
27
30
33
mAP-P
Pin 13 input = 125mVP-P, pin 9
output measurement
IOAR
0.3
1.5
dB
Pin 9 output level difference for pin 13
input = 62.5mVP-P ~ 250mVP-P
IOAF – 4 – 1.5
dB
Pin 9 output level difference for f = 8.0 / 1.0MHz,
pin 12 input = 125mVP-P, guaranteed design value.
2HDR — – 45 – 38 dBc Pin 13 input = 125mVP-P 8MHz spurious
3HDR
— – 50 – 40
dBc
Pin 13 input = 125mVP-P 12MHz spurious,
guaranteed design value.
Fig.2
Fig.2
Fig.2
Fig.2
Fig.2
Fig.2
Cross modulation distortion
CMDR — – 50 – 40 dBc 4.0MHz ± 630kHz spurious, guaranteed design value. Fig.2
Maximum output level
Recording current load
characteristic
IOMR 40 50
I ORL – 1.5 – 0.35
— mAP-P When pin 9 output 2nd harmonic distortion is -30dB
dB
Pin 9 output level difference for load L: 8.2
~ 12µH, guaranteed design value.
Fig.2
Fig.2
Mute attenuation ratio
MUR — – 45 – 38 dBc Pin 9 output level difference for pin 11: M / H.
Fig.2
AGC mode holding voltage
VTH15H 2.7 — VCC V Pin 17 DC voltage to maintain recording AGC operation
AGC mode holding voltage
VTH15L 0 — 1.2 V Pin 17 DC voltage to maintain recording AGC stopped
Note:
dBc: dB below carrier (used to express relative level from carrier reference for convenience sake)
Fig.2
Fig.2
Reference values (unless otherwise noted, Ta = 25°C, VCC = 4.8V and f = 4.0MHz)
Parameter
Symbol Min. Typ. Max. Unit
Conditions (BA7180AS)
ENVE output level
ENVE output level
VENV2' 1.8 2.3 2.8
VENV3' 3.35 3.6 3.85
V
Pin 15 output measurement when
pin 16 output = 100mVP-P.
V
Pin 15 output measurement when
pin 16 output = 400mVP-P.
4

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BA7180AFS 전자부품, 판매, 대치품
Video ICs
BA7180AFS (playback system)
BA7180AS / BA7180AFS
+
20 19 18 17 16 15 14 13 12 11
AGC
DET
HPF
RF
DET
HPF
MUTE
REC
VCC
PRE
PRE
AGC
PRE / REC
+
LOGIC
DET
1 2 3 4 5 6 7 8 9 10
Fig.3
Units: R []
C [F]
L [H]
7

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부품번호상세설명 및 기능제조사
BA7180AFS

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

ROHM Semiconductor
ROHM Semiconductor

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