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| OPA378_15 Datasheet, PDF (17/29 Pages) Texas Instruments – Low-Noise, 900kHz, RRIO,Precision OPERATIONAL AMPLIFIER Zerø-Drift Series | |||
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OPA378
OPA2378
www.ti.com
SBOS417D â JANUARY 2008 â REVISED OCTOBER 2009
Digital Stethoscope
Microphone Output
C4
600pF
R3
100kW
Electret Out
Microphone Gnd
Element
with
Internal FET
C1
33pF
2.2kW
Mic
Mic
Bias Output
C2
R2
+5V
10mF 10kW
OPA378
C3
1mF
VBIAS1
Figure 38. Digital Stethoscope Circuit
C7
110pF
C5
10mF
R4
10kW
C6
470nF
R5
100kW
+5V
OPA378
VBIAS2
Copyright © 2008â2009, Texas Instruments Incorporated
Product Folder Link(s): OPA378 OPA2378
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