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| OPA379AIDBV Datasheet, PDF (13/29 Pages) Texas Instruments – 1.8V, 2.9mA, 90kHz, Rail-to-Rail I/O RATIONAL AMPLIFIERS | |||
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OPA379
OPA2379
OPA4379
www.ti.com ................................................................................................................................................... SBOS347D â NOVEMBER 2005 â REVISED MAY 2008
RSHUNT
Load
RG
zener(1)
R1(2)
10kW
V+
OPA379
V-
+5V
Two zener
biasing methods
are shown.(3)
RBIAS
MOSFET rated to
stand-off supply voltage
such as BSS84 for
up to 50V.
Output
RL
(1) Zener rated for op amp supply capability (that is, 5.1V for OPA379).
(2) Current-limiting resistor.
(3) Choose zener biasing resistor or dual NMOSMETs (FDG6301N, NTJD4001N, or Si1034).
Figure 28. High-Side Current Monitor
VREF R1
RG
R2
R2
R1
VOUT
1/2
V2
OPA2379
1/2
OPA2379
V1
VOUT = (V1 - V2) 1 +
R1 +
R2
2R1
RG
+ VREF
Figure 29. Two Op Amp Instrumentation Amplifier
Copyright © 2005â2008, Texas Instruments Incorporated
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Product Folder Link(s): OPA379 OPA2379 OPA4379
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