Datasheet

C
3
33pF
V+
GND
3
1
8
4
5
6
7
-IN
+IN
2
C
2
DCLOCK
Serial
Interface
1000pF
R
1
1.5kW
R
4
20kW
R
5
20kW
R
6
100kW
R
8
150kW
R
9
510kW
R
7
51kW
D
OUT
V
REF
V+=+2.7Vto5V
CS/SHDN
C
1
1000pF
Electret
Microphone
(1)
G=100
Passband300Hzto3kHz
R
3
1MW
R
2
1MW
ADS7822
12-BitA/D
1/2
OPA2376
1/2
OPA2376
+
+
+
+
+
+
100W
R
6
100W
1kW
1kW
1/2
OPA2376
1/2
OPA2376
10mF
10mF
C
2
33 Fm
10 Fm
10kW
+
R
1
2.7kW
R
9
4.7kW
R
8
4.7kW
33 Fm
D
1
5.1V
2
R
7
100W
C
3
33 Fm
3
2
3
1
1
R
G
R
10
6.8kW
R
11
6.8kW
3.3kW 3.3kW
PhantomPower
(Providespowersourceformicrophone)
48V
1 Fm
INA163
-15V
+15V
Microphone
Typicalmicrophoneinputcircuitusedinmixingconsoles.
Low-leveldifferentialaudiosignal
istransmitteddifferentiallyonthe
samecableaspowertothemicrophone.
Panasonic
WM-034CY
OPA376
OPA2376
OPA4376
www.ti.com SBOS406F –JUNE 2007–REVISED MARCH 2013
An INA163 instrumentation amplifier provides The INA163 gain may be set from 0dB to 80dB by
differential inputs and receives the balanced audio selecting the R
G
value. The INA163 circuit is typical
signals from the cable. of the input circuitry used in mixing consoles.
Figure 30. Phantom-Powered Electret Microphone
NOTE: (1) Electret microphone powered by R
1
.
Figure 31. OPA2376 as a Speech Bandpass Filtered Data Acquisition System
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