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BA8216

Rohm
Part Number BA8216
Manufacturer Rohm
Description Speech Network for Telephones
Published Nov 16, 2005
Detailed Description Communication ICs Speech network for telephones BA8216 The BA8216 is a speech network IC which possesses the basic func...
Datasheet PDF File BA8216 PDF File

BA8216
BA8216


Overview
Communication ICs Speech network for telephones BA8216 The BA8216 is a speech network IC which possesses the basic functions required for handset communications.
In addition 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.
FBlock diagram 3) A BTL circuit is used for reception output, providing a wide dynamic range which enables use of a ceramic receiver.
4) Few external components required.
5) 14-pin DIP package.
238 Communication ICs FAbsolute maximum ratings (Ta = 25_C) BA8216 239 Communication ICs BA8216 FElectrical characteristics (unless otherwise noted, Ta = 25_C, S1 = 1, S2 =1, f = 1kHz, BPF = 400Hz to 30kHz) 240 Communication ICs FElectrical characteristic curves BA8216 241 Communication ICs FMeasurement circuits BA8216 242 Communication ICs BA8216 243 Communication ICs 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 piezoelectric, 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...


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