output voltage decreases below the reference voltage when the IN+ pin is negative relative to the IN– pin and

increases when the IN+ pin is positive relative to the IN– pin. This technique is the most accurate way to bias the

output to a precise voltage.

+

±

IN+

IN±

REF2

REF1

VS

GND

OUT

VS

REF5025

2.5-V

Reference

Copyright © 2016, Texas Instruments Incorporated

Figure 8-4. External Reference Output

8.4.3.2 Output Set to Midsupply Voltage

By connecting one reference pin to VS and the other to the GND pin, the output is set at half of the supply

when there is no differential input, as shown in Figure 8-5. This method creates a ratiometric offset to the supply

voltage, where the output voltage remains at VS / 2 for 0 V applied to the inputs.

+

±

IN+

IN±

REF2

REF1

VS

GND

OUT

Output

VS

Figure 8-5. Midsupply Voltage Output

8.4.3.3 Output Set to Mid-External Reference

In this case, an external reference is divided by two by connecting one REF pin to ground and the other REF pin

to the reference, as shown in Figure 8-6.

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INA241A, INA241B

SBOSA30 – MARCH 2022

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