LA7289

Ordering number : EN5642 Monolithic Linear IC LA7289 VCR Audio Signal Record and Playback Processor Overview The LA7289 includes on chip all functions required for the record and playback of VCR audio signals and achieves complete adjustment-free operation by the adoption of an automatic record bias current adjustment circuit. In addition, the inclusion of a switching circuit for switching between tuner and line input in addition to the circuits provided by earlier ICs makes the LA7289 truly optimal for audio VCR products. Features Adjustment-free record bias current (automatic adjustment circuit adopted) Built-in record bias oscillator circuit power supply switch Record equalizer choke coil no longer required Playback amplifier input noise voltage: 1.0 µV rms Value of the ALC detector capacitor reduced (to 3.3 µF) Built-in high-voltage head switching circuit Supply voltage: supports both 9 and 12-V operation Built-in input switching circuit (for the line and tuner inputs) Functions Equalizer amplifier Ripple filter Record/playback switching circuit Muting SP/LP/EP switching circuit Record amplifier ALC Tape head switching circuit Automatic record bias adjustment circuit Input switching circuit (line/tuner) Package Dimensions unit: mm 3067-DIP24S [LA7289] SANYO: DIP24S Specifications Maximum Ratings at Ta = 25°C Parameter Maximum supply voltage Pin 2 input voltage Pin 2 input current Allowable power dissipation Operating temperature...