Datasheet

AD7322 Data Sheet
Rev. B | Page 24 of 36
RANGE REGISTER
The range register is used to select one analog input range per
analog input channel. This register is a 6-bit, write-only register
with two dedicated range bits for each of the analog input
channels, Channel 0 and Channel 1. There are four analog input
ranges, ±10 V, ± 5 V, ±2.5 V, and 0 V to +10 V. A write to the
range register is selected by setting the write bit to 1 and the
register select bit to 1. After the initial write to the range register
occurs, each time an analog input is selected, the AD7322
automatically configures the analog input to the appropriate
range, as indicated by the range register. The ±10 V input range
is selected by default on each analog input channel (see Table 13).
MSB LSB
16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1
Write Zero Register Select V
IN
0A V
IN
0B 0 0 V
IN
1A V
IN
1B 0 0 0 0 0 0 0
Table 13. Range Selection
V
IN
xA V
IN
xB Description
0 0 This combination selects the ±10 V input range on V
IN
x.
0 1 This combination selects the ±5 V input range on V
IN
x.
1 0 This combination selects the ±2.5 V input range on V
IN
x.
1
1
This combination selects the 0 V to +10 V input range on V
IN
x.