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INA321 Datasheet(PDF) 13 Page - Texas Instruments

No. de pieza INA321
Descripción Electrónicos  Precision, Rail-to-Rail I/O INSTRUMENTATION AMPLIFIER
PDF  28 Pages
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Fabricante Electrónico  TI2 [Texas Instruments]
Página de inicio  https://www.ti.com
Logo TI2 - Texas Instruments

INA321 Datasheet(HTML) 13 Page - Texas Instruments

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INA326, INA327
13
SBOS222D
www.ti.com
FIGURE 6. Generating Output Offset Voltage.
R
1
R
′
2
5
R
0
R
2
C
2
C
0
V
REF
V
O
G = 2 (R
2 || R′2)/R1
INA326
R
2 and R′2 are chosen to
create a small output offset
voltage (e.g., 100mV).
Gain is determined by
the parallel combination
of R
2 and R′2.
2
1
8
3
6
FIGURE 7. Output Referenced to VREF/2.
2k
Ω
200k
Ω
200k
Ω
V
REF
R
O
100
Ω
5
6
2
1
8
3
C
O
1
µF
C
2
INA326
A/D
Converter
G = 2(200k
Ω || 200kΩ)/2kΩ = 100
FIGURE 8. High-Side Current Shunt Measurement.
INA326
+5V
R
L
5
2
1
8
3
6
7
R
O
100
Ω
R
S
I
L
R
1
2k
Ω
R
2
C
2
V
O
C
O
1
µF
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 100mV
beyond the rail.
V
O = 2(IL × RS)
R
2
R
1
APPLICATION CIRCUITS



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