Datasheet > LA8638V

LA8638V

更新时间： 2024-11-30 22:31:35

品牌	Logo	应用领域
三洋 - SANYO		电话
页数	文件大小	规格书
16页	399K
描述
Low-voltage Compander IC for Cordless Telephones

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中文翻译

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数据手册

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LA8638V 数据手册

Ordering number : EN5776

Monolithic Linear IC

LA8638V

Low-voltage Compander IC

for Cordless Telephones

speaker with a load of 2 kΩ

Overview

• Standby operation that conserves battery power during

intermittent reception by disabling all but the waveform

shaper for the receiving signal

• Built-in splatter filter with user-specified fc

• Low-voltage operation (1.8 V to 5.5 V)

The LA8638V provides dynamic range expansion, noise

suppression for enhancing the quality of audio signals in

cordless telephones and other communications systems.

This single chip provides the functions that make it ideal

for cordless telephones: a compressor with a logarithmic

compression ratio of 1/2, expander with a logarithmic

expansion ratio of 2, splatter filter, microphone amplifier,

BTL amplifier, waveform shaper for the receiving signal,

muting for both receiving and transmitting signals, and

standby operation.

Package Dimensions

unit: mm

3191-SSOP30

[LA8638V]

Functions

• Transmitter circuits: compressor, microphone amplifier,

limiter (IDC), muting, output level changes to user-

specified levels, and splatter filter

• Receiver circuits: expander, buffer amplifier for filters,

muting, output level changes to user-specified levels,

and BTL amplifier

• Other circuits: waveform shaper for the receiving signal

and standby operation

Features

• Full processing of baseband signals for both receiving

and transmitting signals

SANYO: SSOP30

• Built-in BTL receiver amplifier for driving a ceramic

Specifications

Maximum Ratings at Ta = 25°C

Parameter

Maximum power supply voltage

Maximum power dissipation

Operating temperature

Symbol

Conditions

Ratings

7.0

Unit

_CCmax

Pd max

Topr

Ta ≤ 75°C

100

–20 to +75

–40 to +125

°C

Storage temperature

Tstg

°C

Operating Conditions at Ta = 25°C

Parameter

Symbol

V_CC

Conditions

Ratings

2.4

Unit

Recommended power supply voltage

Operating power supply voltage range

V_CCop

1.8 to 5.5

SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters

TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110-8534 JAPAN

40398RM (OT) No. 5776-1/16

12 3 4 5 6 7...16

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