LA7256 データシートの表示（PDF） - SANYO -> Panasonic
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LA7256 Datasheet PDF : 9 Pages
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Ordering number : EN4896
Monolithic Linear IC
LA7256
High-Fidelity Audio Signal Record/Playback
Processing Circuit for VCR Products
Overview
The LA7256 provides the record and playback
amplification functions required for high-fidelity audio
signal processing in VCR systems. The record system
supports S-VHS and over-recording, and also supports the
provision of an adjustment-free record current by using a
constant-current regulated output scheme incorporating an
AGC circuit. The playback system consists of a high-gain
preamplifier with a small DC offset, and includes a built-
in EP gain increasing function.
Functions
• Preamplifier (two channels)
• RF switching between CH1 and CH2
• Record AGC amplifier (for over-recording and S-VHS)
• Constant-current regulated output record amplifier
• Buffer amplifier that can be used in both record and
playback
Features
• Minimal number of required external components
• The playback amplifier output DC offset is small.
• Built-in EP mode gain emphasis
• Record AGC that handles three modes (for an
adjustment-free record current)
• Built-in buffer amplifier that can be used to construct an
active filter.
Package Dimensions
unit: mm
3067-DIP24S
[LA7256]
SANYO: DIP24S
Specifications
Maximum Ratings at Ta = 25°C
Parameter
Maximum supply voltage
Allowable power dissipation
Operating temperature
Storage temperature
Symbol
VCC max
Pd max
Topr
Tstg
Ta ≤ 65°C
Conditions
Ratings
Unit
7.0
V
700
mW
–10 to +65
°C
–55 to +150
°C
Operating Conditions at Ta = 25°C
Parameter
Recommended supply voltage
Operating supply voltage range
Symbol
VCC
VCC op
Conditions
Ratings
Unit
5.0
V
4.5 to 5.5
V
SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110-8534 JAPAN
63095HA (OT) No. 4896-1/9
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