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参数资料
| 型号： | LA7256 |
| 元件分类： | 音频／视频放大 |
| 英文描述： | 2 CHANNEL, AUDIO PREAMPLIFIER, PDIP24 |
| 封装： | SDIP-24 |
| 文件页数： | 1/9页 |
| 文件大小： | 139K |
| 代理商： | LA7256 |
Monolithic Linear IC
Ordering number : EN4896
63095HA (OT) No. 4896-1/9
SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110-8534 JAPAN
High-Fidelity Audio Signal Record/Playback
Processing Circuit for VCR Products
LA7256
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
Specifications
Maximum Ratings at Ta = 25°C
Operating Conditions at Ta = 25°C
Parameter
Symbol
Conditions
Ratings
Unit
Maximum supply voltage
VCC max
7.0
V
Allowable power dissipation
Pd max
Ta
≤ 65°C
700
mW
Operating temperature
Topr
–10 to +65
°C
Storage temperature
Tstg
–55 to +150
°C
Parameter
Symbol
Conditions
Ratings
Unit
Recommended supply voltage
VCC
5.0
V
Operating supply voltage range
VCC op
4.5 to 5.5
V
[LA7256]
SANYO: DIP24S
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