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INA326EA/2K5 Datasheet(PDF) 14 Page - Texas Instruments

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Part # INA326EA/2K5
Description  Precision, Rail-to-Rail I/O INSTRUMENTATION AMPLIFIER
PDF  26 Pages
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Manufacturer  TI1 [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI1 - Texas Instruments

INA326EA/2K5 Datasheet(HTML) 14 Page - Texas Instruments

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INA326, INA327
14
SBOS222D
www.ti.com
FIGURE 10. Low-Side –48V Current Shunt Monitor.
INA326
R
L
I
L
5
4
2
1
8
3
6
7
R
I = 2kΩ
0.1
µF
OPA336PA
1nF
+5V
7
6
2
V
CC
GND
3
4
R
F = 100kΩ
R
START
100k
Ω
R
PULL- DOWN
200k
Ω
V
O = 2(IL × RS)
8.45k
Ω
ZMM5231BDICT
5.1V
ZVN4525G
(zetex)
(High- Voltage
n- Channel
FET)
R
S
V
S = 0mV
to 50mV max
−
+
−48V
NOTE: 0.2% accuracy. Current shunt
monitor circuit can be designed for
−250V supply
with appropriate selection of high- voltage FET.
R
F
R
I
FIGURE 11. High-Side +48V Current Shunt Monitor.
INA326
Load
5
7
2
1
8
3
6
4
7
2
3
6
4
R
I
2k
Ω
OPA336PA
1nF
0.1
µF
49.9k
Ω
75k
Ω
165k
Ω
V
O = 0.1V to 4.9V
8.45k
Ω
ZMM5231BDICT
5.1V
R
SHUNT
V
SHUNT = 0mV
to 50mV
−
+
+48V
V
CC
GND
(High- Voltage
p- Channel FET)
ZVP4525
(zetex)
+5V
FIGURE 9. Low-Side Current Shunt Measurement.
INA326
+5V
R
L
R
S
I
L
R
O
100
Ω
5
2
1
8
3
6
7
C
2
C
O
1
µF
2k
Ω
V
O
R
2
R
1
NOTE: Connection point of V
− will include (
) or
exclude (
) quiescent current in the measurement
as desired. Output offset required for measurements
near zero (see Figure 6).
R
S must be chosen so that
the input voltage does not
exceed 20mV beyond the rail.
V
O = 2(IL × RS)
R
2
R
1



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