LA7289 Datasheet (Sanyo) - VCR Audio Signal Record and Playback Processor

LA7289, VCR Audio Signal Record and Playback Processor

EE, playback → VCC Record → Control voltage Internal circuit A06818 2 Head switch (high voltage) Playback → On Record, EE → Off On resistance → 10 Ω (typical) Withstand voltage when off → ±45 V (f = 70 kHz) 3 GND Ground used for the pin 2 head switching circuit and the EQ amplifier.

4 EQ am

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

LA7289 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