Preliminary Data Sheet

AD8231

Rev. PrC | Page 7 of 8

GAIN SELECTION

The AD8231’s gain is set by voltages applied to the A0, A1, and

A2 pins. High (HI) or low (LO) voltage limits are listed in the

specifications section. To change the gain, the WR pin must be

driven low. When the WR pin is driven high, the gain is

latched, and voltages at the A0-A2 pins will have no effect. Table

3 is the truth table showing the different gain settings.

WR

A2

A1

A0

Gain

LO

LO

LO

LO

1

LO

LO

LO

HI

2

LO

LO

HI

LO

4

LO

LO

HI

HI

8

LO

HI

LO

LO

16

LO

HI

LO

HI

32

LO

HI

HI

LO

64

LO

HI

HI

HI

128

HI

X

X

X

No change

Table 3 Truth table for AD8231’s gain settings