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INA826 Datasheet(PDF) 23 Page - Texas Instruments

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No. de pieza INA826
Descripción Electrónicos  INA823 Precision, Low-Power, Wide-Supply (2.7-V to 36-V) Instrumentation Amplifier
PDF  33 Pages
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Fabricante Electrónico  TI [Texas Instruments]
Página de inicio  http://www.ti.com
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INA826 Datasheet(HTML) 23 Page - Texas Instruments

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Equation 9 calculates the common-mode rejection ratio with given factors:
CMRRdB =  G1 +1
α∙ΔRR∙ n
(9)
CMRRdB =  0.25 +1
0.33∙0.1%∙√4 = 65.5 dB
(10)
The scaling ratio G1 is calculated by:
G1 =  Rf Rf+ Ri
(11)
Where Rf is variable and Ri is fixed at 750 kΩ.
Figure 9-6 shows a comparison between the CMRR performance at worst-case (α neglected) and considering
normal distribution for different gain settings of G1.
For more details about the calculation of CMRR, see the Difference amplifier (subtractor) circuit analog
engineer's circuit.
9.2.2.3 Application Curves
Figure 9-6. Common-mode Rejection Ratio of External Resistor Network for Different Scaling Ratios
www.ti.com
INA823
SBOSA75A – JULY 2021 – REVISED JULY 2021
Copyright © 2021 Texas Instruments Incorporated
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Product Folder Links: INA823



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