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參數資料
| 型號： | LA7256 |
| 廠商： | Sanyo Electric Co.,Ltd. |
| 英文描述： | High-Fidelity Audio Signal Record/Playback Processing Circuit for VCR Products(用于高逼真度VCR的音頻信號錄音/重放處理芯片) |
| 中文描述： | 高保真音頻信號記錄/回放處理電路的錄像機產品（用于高逼真度錄像機的音頻信號錄音/重放處理芯片） |
| 文件頁數： | 1/9頁 |
| 文件大?。?/td> | 139K |
| 代理商： | LA7256 |
Monolithic Linear IC
LA7256
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
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
V
CC
max
Pd max
7.0
V
Allowable power dissipation
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
V
CC
V
CC
op
5.0
V
Operating supply voltage range
4.5 to 5.5
V
[LA7256]
SANYO: DIP24S
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