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BA8216 데이터시트 PDF




ROHM Semiconductor에서 제조한 전자 부품 BA8216은 전자 산업 및 응용 분야에서
광범위하게 사용되는 반도체 소자입니다.


PDF 형식의 BA8216 자료 제공

부품번호 BA8216 기능
기능 Speech Network for Telephones
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BA8216 데이터시트, 핀배열, 회로
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 1.3kloop circuit resistance and
100telephone 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




BA8216 pdf, 반도체, 판매, 대치품
Communication ICs
FElectrical characteristic curves
BA8216
241

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BA8216 전자부품, 판매, 대치품
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 (1300) (OFF)
S5: ON / OFF switch for parallel resistance (100) (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

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