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EXTERNAL REFERENCED OUTPUT

Tying both pins together and to a reference produces an output

equal to the reference voltage when there is no differential input

(see Figure 26). The output moves down from the reference

voltage when the input is negative, relative to the −IN pin, and

up when the input is positive, relative to the −IN pin.

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+IN

–IN

NC

NC = NO CONNECT

GND

V+

OUT

2.5V VOLTAGE

REFERENCE

Figure 26. External Referenced Output

SPLITTING THE SUPPLY

By tying one reference pin to V+ and the other to the ground

pin, the output is set at half of the supply when there is no

differential input (see Figure 27). The benefit is that no external

reference is required to offset the output for bidirectional current

measurement. This configuration creates a midscale offset that is

ratiometric to the supply, which means that if the supply increases

or decreases, the output remains at half the supply. For example, if

the supply is 5.0 V, the output is at half scale or 2.5 V. If the supply

increases by 10% (to 5.5 V), the output goes to 2.75 V.

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+IN

–IN

NC

NC = NO CONNECT

GND

V+

OUT

Figure 27. Split Supply

SPLITTING AN EXTERNAL REFERENCE

In this case, an external reference is divided by 2 with an

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+IN

–IN

NC

NC = NO CONNECT

GND

V+

OUT

5V

VOLTAGE

REFERENCE

Figure 28. Split External Reference