LA7289 Datasheet, PDF (1/11 Pages) Sanyo Semicon Device – VCR Audio Signal Record and Playback Processor

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.
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)
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)
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
Storage temperature
Symbol
V_CC max
V_IN2
I_IN2
Pd max
Topr
Tstg
DC
Ta ≤ 65 °C
Operating Conditions at Ta = 25°C
Parameter
Recommended supply voltage
Allowable operating voltage range
Symbol
V_CC
V_CCop
Conditions
Conditions
Ratings
14
±45
±1.5
500
–10 to +65
–55 to +150
Unit
V
Vp-p
mA
mW
°C
°C
Ratings
Unit
9, 12
V
8.5 to 12.5
V
SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110 JAPAN
43097HA(OT) No. 5642-1/11