8.4.3.1 Output Set to External Reference Voltage

Connecting both pins together and then to a reference voltage results in an output voltage equal to the reference

voltage for the condition of shorted input pins or a 0 V differential input. Figure 8-4 shows this configuration. The

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 Mid-Supply Voltage

By connecting one reference pin to VS and the other to the GND pin, Figure 8-5 shows that the output is set

at half of the supply voltage when there is no differential input. 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–

REF1

REF2

VS

GND

OUT

Output

VS

Figure 8-5. Mid-Supply Voltage Output

8.4.3.3 Output Set to Mid-External Reference

In this case, Figure 8-6 shows how an external reference can divided by two by connecting one REF pin to

ground and the other REF pin to the reference.

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INA296A, INA296B

SBOSA04C – MARCH 2022 – REVISED OCTOBER 2023

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