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BA7184 Datasheet(PDF) 1 Page - Rohm |
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BA7184 Datasheet(HTML) 1 Page - Rohm |
1 / 8 page 1 Video ICs 4-channel PRE / REC amplifier with auto-tracking interface BA7184S The BA7184S is a PRE / REC amplifier developed for use in video cassette recorders. It is compatible with four-head decks and features built-in FB damping, four preamplifiers, a chroma output amplifier, an FM output amplifier (with AGC), an envelope detector and envelope comparator, a constant-current BTL-drive REC amplifier (with AGC) and channel switching, EP / SP switching, and mode switching integrated onto a single monolithic IC. •Applications VCRs •Features 1) The playback amplifier has a total gain of 56dB (Typ.), and has a low-noise preamplifier. Designed for VHS band operation with low external parts count. The IC has 4 circuits for 4-head VCR applica- tions. 2) Two playback output systems (through output and AGC output). The AGC output level is 315mVP-P (Typ.); suitable for FM brightness signal output. 3) Auto-tracking interface for automated tracking adjustment. Linear detector characteristic with sen- sitivity that can be set using external components. 4) The recording amplifier uses constant-current BLT drive that handles load variations (i.e. headimped- ance) well, and gives stable recording characteris- tics. 2 circuits are provided for 4-head VCR use. 5) Built-in recording level AGC means adjustment of FM recording current is not necessary. 6) Head switches for 4-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) Applied voltage Power dissipation Operating temperature Storage temperature Parameter ∗1 Reduced by 10.5mW for each increase in Ta of 1°C over 25°C (free air). Symbol Limits VCC 7.0 1050∗1 Topr Tstg Unit V mW °C °C Pd – 20 ~ + 65 – 55 ~ + 125 Playback / recording Parameter Not designed for radiation resistance. Symbol Min. Typ. Max. Unit Conditions VCC 4.5 5.0 5.5 V 13pin |
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