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
鈥?Adjustment-free record bias current (automatic
adjustment circuit adopted)
鈥?Built-in record bias oscillator circuit power supply
switch
鈥?Record equalizer choke coil no longer required
鈥?Playback amplifier input noise voltage: 1.0 碌V rms
鈥?Value of the ALC detector capacitor reduced (to 3.3 碌F)
鈥?Built-in high-voltage head switching circuit
鈥?Supply voltage: supports both 9 and 12-V operation
鈥?Built-in input switching circuit (for the line and tuner
inputs)
Functions
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
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擄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
IN
2
I
IN
2
Pd max
Topr
Tstg
Ta
鈮?/div>
65 擄C
DC
Conditions
Ratings
14
鹵45
鹵1.5
500
鈥?0 to +65
鈥?5 to +150
Unit
V
Vp-p
mA
mW
擄C
擄C
Operating Conditions
at Ta = 25擄C
Parameter
Recommended supply voltage
Allowable operating voltage range
Symbol
V
CC
V
CC
op
Conditions
Ratings
9, 12
8.5 to 12.5
Unit
V
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
LA7289相關(guān)型號(hào)PDF文件下載
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英文版
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VCR Electronic Switch
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