Datasheet > SAN2202A

SAN2202A

更新时间： 2022-11-26 04:22:24

品牌	Logo	应用领域
SAMES		放大器
页数	文件大小	规格书
9页	83K
描述
SINGLE CHIP SPEAKERPHONE WITH 8 - OHM LOUDSPEAKER AMPLIFIER

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SAN2202A 数据手册

SAN2202

APPLICATION NOTE

sa me s

SINGLE CHIP “SPEAKERPHONE” WITH

8 - OHM LOUDSPEAKER AMPLIFIER

1 Scope

This application note describes a low-cost add-on circuit for driving an 8Ω-Loudspeaker to get a simple loudhearing

(“Speakerphone”) Telephone.

To possible ways of supplying the amplifier are shown:

SAN2202a:

SAN2202b:

Amplifier supply in shunt transistor path

Amplifier supply by power extraction circuit (SAN3020)

It can be added to any SA253x application without interfering with PTT-relevant parameters, like AC-impedance,

Sidetone cancellation or DC-mask.

2 Key Features

•

Low cost additional circuit enables use of loudhearing function

Full duplex “handsfree” operation via handset microphone and loudspeaker (at distances <2m between

telephone and user)

•

Can be added to any SA253x- application

Enables use of low cost 8Ω - Loudspeaker

High output power with low distortion

Entirely powered from the telephone line

No influence of loudspeaker amplifier in AC-impedance, sidetone cancellation or DC-mask

Loudspeaker volume adjustable by potentiometer

Excellent sidetone cancellation of SAS253x circuits enables high loudspeaker volume without howling between

handset microphone and loudspeaker

SAN2202

PDS038-SA2531/2-001

Rev. B

21-03-00

12 3 4 5 6 7...9

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型号	品牌	描述	获取价格	数据表
SAN2202B	SAMES	SINGLE CHIP SPEAKERPHONE WITH 8 - OHM LOUDSPEAKER AMPLIFIER	获取价格
SAN3010	SAMES	SINGLE CHIP TELEPHONE INTERFACE FOR KEYBOARD ENTRY VIA uC	获取价格
SAN3020	SAMES	SINGLE CHIP TELEPHONE POWER EXTRACTION FOR EXTERNAL LOADS	获取价格
SAN3021	SAMES	Single Chip Telephone: Using dynamic microphone as tone ringer	获取价格
SAN3022	SAMES	Single Chip Telephone: Using dynamic microphone as tone ringer	获取价格
SAN-404	GAMEWELL-FCI	Four-Zone Fire Alarm Control Panel	获取价格