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BA7182AS 数据表(PDF) 1 Page - Rohm |
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BA7182AS 数据表(HTML) 1 Page - Rohm |
1 / 9 page 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. |
类似零件编号 - BA7182AS |
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类似说明 - BA7182AS |
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