AD8207

Rev. 0 | Page 11 of 16

POWER SUPPLY ADJUSTMENT

3.3 V TO 4.5 V SUPPLY OPERATION

The AD8207 can operate with a single-supply voltage as low

as 3.3 V to 4.5 V. This mode of operation is achieved by con-

necting the RANGE pin (Pin 4) to the supply (see Figure 26).

It is recommended that an external resistor be placed in series

from the RANGE pin to the supply. This resistor can be a

typical 5 kΩ 1% resistor.

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AD8207

TOP VIEW

(Not to Scale)

3.3V

3.3V

OUT

SHUNT

Figure 26. 3.3 V Supply Operation

Note that in this mode of operation, the common-mode range

of the AD8207 is limited to −4 V to +35 V. The output and

reference input ranges are limited to the supply of the part. The

user can have a 4.5 V supply and connect the RANGE pin from

3.3 V to 4.5 V. Alternatively, the user can connect the RANGE

pin as high as 4.5 V, with the supply from 3.3 V to 4.5 V.

4.5 V TO 5.5 V SUPPLY OPERATION

In most applications, the AD8207 operates with a single 5 V

supply. In this mode, the operating input common-mode

range of the AD8207 is rated from −4 V to +65 V. To operate

the device with a 5 V supply (includes 4.5 V to 5.5 V), connect

the RANGE pin (Pin 4) to logic low, or GND, as shown in

Figure 27.

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AD8207

TOP VIEW

(Not to Scale)

5V

OUT

SHUNT

Figure 27. 5 V Supply Bidirectional Operation

The output and reference input ranges are limited to the

supply voltage used. With a supply voltage from 4.5 V to 5.5 V,

the RANGE pin (Pin 4) should be connected to GND to achieve

the maximum input common-mode range specification of −4 V

to +65 V.