INA826 datasheet(23/33 Pages) TI

Numer części	INA826

Szczegółowy opis	INA823 Precision, Low-Power, Wide-Supply (2.7-V to 36-V) Instrumentation Amplifier

PDF	33 Pages

Scroll/Zoom	100%

Producent	TI [Texas Instruments]

Strona internetowa	http://www.ti.com

Logo

23 / 33 page

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

Submit Document Feedback

Product Folder Links: INA823

INA826 Arkusz danych(PDF) 23 Page - Texas Instruments