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BA7182 PDF预览

BA7182

更新时间: 2024-10-31 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

BA7182 数据手册

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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 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.  
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  
VCC  
Limits  
7.0  
Unit  
V
Applied voltage  
Power dissipation  
Pd  
mW  
°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  
VCC  
Min.  
4.5  
Typ.  
5.0  
Max.  
5.5  
Unit Conditions  
V
12pin  
Not designed for radiation resistance.  
1

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