INA350 datasheet(29/45 Pages) TI

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Output Voltage (V)

-0.6

0.6

1.2

1.8

2.4

3.6

4.2

4.8

5.4

-0.6

0.6

1.2

1.8

2.4

3.6

4.2

4.8

5.4

D09_

VS = 5.5 V

G = 10, 20

VREF = 0 V

Figure 9-4. Input Common-Mode Voltage vs Output Voltage (High CMRR Region)

Additional series resistor in the Wheatstone bridge string (R1) may or may not be required. This is decided

based on the intended output voltage swing for a particular combination of supply voltage, reference voltage and

the selected gain for an input common mode voltage range. R1 helps adjust the input common-mode voltage

range, and thus can help accommodate the intended output voltage swing. In this particular example, it are not

required and can be shorted out.

9.2.1.3 Application Curves

The following typical characteristic curve is for the circuit in Figure 9-3.

Bridge Resistance R + 'R (:)

5000 5200 5400 5600 5800 6000 6200 6400 6600 6800 7000

0.3

0.6

0.9

1.2

1.5

1.8

2.1

2.4

2.7

0.30

0.27

0.24

0.21

0.18

0.15

0.12

0.09

0.06

0.03

D100

VOUT

VDIFF

Figure 9-5. Input Differential Voltage, Output Voltage vs Bridge Resistance

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INA350

SBOSAA0A – NOVEMBER 2021 – REVISED DECEMBER 2021

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