AD8210

Data Sheet

Rev. D | Page 12 of 16

External Referenced Output

an output offset at the reference voltage when there is no

differential input (see Figure 29). When the input is negative

relative to the −IN pin, the output moves down from the

reference voltage. When the input is positive relative to the

−IN pin, the output increases.

AD8210

OUTPUT

G = +20

+IN

–IN

GND

0.1µF

0V

Figure 29. External Reference Output

Splitting an External Reference

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

an accuracy of approximately 0.2% by connecting one

voltage (see Figure 30).

resistors that connect to an internal offset node. There is no

operational difference between the pins.

For proper operation, the AD8210 output offset should not be

set with a resistor voltage divider. Any additional external

resistance could create a gain error. A low impedance voltage

source should be used to set the output offset of the AD8210.

AD8210

OUTPUT

G = +20

+IN

–IN

GND

0.1µF

0V

Figure 30. Split External Reference

Splitting the Supply

By tying one reference pin to V+ and the other to the GND pin,

the output is set at midsupply when there is no differential input

(see Figure 31). This mode is beneficial because no external

reference is required to offset the output for bidirectional

current measurement. This creates a midscale offset that is

ratiometric to the supply, meaning that if the supply increases

or decreases, the output still remains at half scale. 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 also increases by

10% (2.75 V).

0.1µF

AD8210

OUTPUT

G = +20

+IN

–IN

GND

Figure 31. Split Supply