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INA828 Datasheet(PDF) 27 Page - Texas Instruments

Part # INA828
Description  INA828 50-μV Offset, 7-nV/√Hz Noise, Low-Power, Precision Instrumentation Amplifier
PDF  40 Pages
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Manufacturer  TI2 [Texas Instruments]
Direct Link  https://www.ti.com
Logo TI2 - Texas Instruments

INA828 Datasheet(HTML) 27 Page - Texas Instruments

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0
1
2
3
4
5
-10
-5
0
5
10
Input Voltage (V)
C001
0
1
2
3
4
5
-20
-10
0
10
20
Input Current (mA)
C001
G
50 k
50 k
R
10.5 k
G 1
5.75 1
:
:
:
V
V
OUT
REF
-
V
D
G =
=
= 5.75
4.8 V
2.5 V
400 mV
-
V
V
R
V
1
D
V
V
IN
-
D
´
R
2
R + R
1
2
V = V
R
D
IN
2
=
´
®
= 4.167 kW
27
INA828
www.ti.com
SBOS792A – AUGUST 2017 – REVISED JANUARY 2018
Product Folder Links: INA828
Submit Documentation Feedback
Copyright © 2017–2018, Texas Instruments Incorporated
Typical Application (continued)
Use Equation 5 to calculate R2 given VD = ±400 mV, VIN = ±10 V, and R1 = 100 kΩ.
(5)
The value obtained from Equation 5 is not a standard 0.1% value, so 4.17 kΩ is selected. R1 and R2 also use
0.1% tolerance resistors to minimize error.
Use Equation 6 to calculate the ideal gain of the instrumentation amplifier.
(6)
Equation 7 calculates the gain-setting resistor value using the INA828 gain equation, Equation 1.
(7)
10.5 kΩ is a standard 0.1% resistor value that can be used in this design.
8.4.3 Application Curves
Figure 69 and Figure 70 show typical characteristic curves for the circuit in Figure 68.
Figure 69. PLC Output Voltage vs Input Voltage
Figure 70. PLC Output Voltage vs Input Current



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