|
|
|
부품번호 | BA8216 기능 |
|
|
기능 | Speech Network for Telephones | ||
제조업체 | ROHM Semiconductor | ||
로고 | |||
전체 9 페이지수
Communication ICs
Speech network for telephones
BA8216
The BA8216 is a speech network IC which possesses the basic functions required for handset communications. In addi-
tion to amplifying signals from a transmitter and sending them to a telephone line, it also amplifies only reception signals
from a telephone line and drives the receiver.
FApplications
Telephones and telephone equipment
FFeatures
1) Basic speech network functions built in.
S Handset transmit and receive circuits
S DTMF transmit circuit
S Key tone input circuit
S Mute control and side tone masking circuits
2) Can be used with 1.3kΩ loop circuit resistance and
100Ω telephone resistance.
3) A BTL circuit is used for reception output, providing
a wide dynamic range which enables use of a ceram-
ic receiver.
4) Few external components required.
5) 14-pin DIP package.
FBlock diagram
238
Communication ICs
FElectrical characteristic curves
BA8216
241
4페이지 Communication ICs
BA8216
FMeasurement method (MUTE = HIGH)
(1) Reception
(1) Set S3 to R and S4 and S5 to OFF, and input a 1kHz
signal from OSC1. Adjust to -10dBV if VM2 is piezoelec-
tric, and to -30dBV if VM2 is electromagnetic.
(2) With S4 OFF and S5 ON, record the output level of VM2
and note this value as VM2 (2).
(3) With S4 ON and S5 ON, measure the output level of
VM2, and note this value as VM2 3 .
∆GR = 20log (VM2 3 / VM2 2 )
(2) Transmission
(1) Set S3 = T and S4 and S5 to OFF, input a 1kHz signal
from OSC2, and adjust so that VM1 is –10dBV.
(2) With S4 OFF and S5 ON, record the output level of VM1
and note this value as VM1 2 .
(3) With S4 ON and S5 ON, measure the output level of
VM1, and note this value as VM1 3 .
∆GMIC = 20log (VM1 3 / VM1 2 )
S3: Send and receive switch ( reception side)
S4: ON / OFF switch for line resistance (1300Ω) (OFF)
S5: ON / OFF switch for parallel resistance (100Ω) (OFF)
FCircuit opperation
The BA8216 carries out the following basic operations.
(1) Handset talk and receive
The BA8216 receives a voice signal from a telephone
line and outputs it to a handset speaker. It also takes a
voice signal from the handset microphone and outputs it
to the telephone line.
(2) DTMF send and key tone input
The BA8216 has a mute switch which can be switched
between a “handset send and receive” mode and a
“DTMF send and key tone input” mode by an external
logic signal. In the “DTMF send and key tone input”
mode, it transmits DTMF signals from the dial pad to the
telephone line, and key tones to the handset receiver.
FOperation notes
The maximum power dissipation for the BA8216 is
900mW. Since the maximum power dissipation varies
with temperature, the product of the applied voltage VL
and the total current drawn by the IC, after factoring in the
temperature, should not exceed the maximum dissipa-
tion.
244
7페이지 | |||
구 성 | 총 9 페이지수 | ||
다운로드 | [ BA8216.PDF 데이터시트 ] |
당사 플랫폼은 키워드, 제품 이름 또는 부품 번호를 사용하여 검색할 수 있는 |
구매 문의 | 일반 IC 문의 : 샘플 및 소량 구매 ----------------------------------------------------------------------- IGBT, TR 모듈, SCR 및 다이오드 모듈을 포함한 광범위한 전력 반도체를 판매합니다. 전력 반도체 전문업체 상호 : 아이지 인터내셔날 사이트 방문 : [ 홈페이지 ] [ 블로그 1 ] [ 블로그 2 ] |
부품번호 | 상세설명 및 기능 | 제조사 |
BA8210N | Speech Network | ROHM Semiconductor |
BA8211N | Speech Network | ROHM Semiconductor |
DataSheet.kr | 2020 | 연락처 | 링크모음 | 검색 | 사이트맵 |