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OPA378 Datasheet(PDF) 14 Page - Texas Instruments

Part # OPA378
Description  Low-Noise, 900kHz, RRIO, Precision OPERATIONAL AMPLIFIER Zerø-Drift Series
PDF  31 Pages
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Manufacturer  TI2 [Texas Instruments]
Direct Link  https://www.ti.com
Logo TI2 - Texas Instruments

OPA378 Datasheet(HTML) 14 Page - Texas Instruments

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OPA378
ADS1100
Load
V
I C
2
R
1
4.99kW
R
3
4.99kW
R
4
48.7kW
R
2
49.9kW
+5V
3V
REF3330
R
7
1.18kW
R
SHUNT
1W
R
6
71.5kW
R
N
56W
R
N
56W
(PGAGain=4)
FS=3.0V
StrayGround-LoopResistance
I
LOAD
R
600
S
W
C
1.2nF
1
OPA378
Output
R
SHUNT
Load
V+
V+
R
G
R
L
R
(2)
1
10kW
R
BIAS
+5V
zener
(1)
Twozener
biasingmethods
areshown.
(3)
MOSFETratedto
stand-offsupplyvoltage
suchasBSS84for
upto50V.
R
SHUNT
C
BYPASS
OPA378
OPA2378
SBOS417D – JANUARY 2008 – REVISED OCTOBER 2009
www.ti.com
NOTE: 1% resistors provide adequate common-mode rejection at small ground-loop errors.
Figure 32. Low-Side Current Monitor
(1) Zener rated for op amp supply capability (that is, 5.1V for the OPA378).
(2) Current-limiting resistor.
(3) Choose zener biasing resistor or dual NMOSFETs (2N7002, NTZD511ON, SM6K2T110).
Figure 33. High-Side Current Monitor
14
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Copyright © 2008–2009, Texas Instruments Incorporated
Product Folder Link(s): OPA378 OPA2378



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