Datasheet

Data Sheet AD7323
Rev. B | Page 25 of 36
SEQUENCE REGISTER
The sequence register on the AD7323 is a 4-bit, write-only register.
Each of the four analog input channels has one corresponding
bit in the sequence register. To select a channel for inclusion in
the sequence, set the corresponding channel bit to 1 in the
sequence register.
RANGE REGISTER
The range register is used to select one analog input range per
analog input channel. It is an 8-bit, write-only register with two
dedicated range bits for each of the analog input channels from
Channel 0 to Channel 3. 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 bits to 0 and 1. After the initial write to the range register
occurs, each time an analog input is selected, the AD7323
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 Register Select 1 Register Select 2 V
IN
0 V
IN
1 V
IN
2 V
IN
3 0 0 0 0 0 0 0 0 0
MSB LSB
16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1
Write Register Select 1 Register Select 2 V
IN
0A V
IN
0B V
IN
1A V
IN
1B V
IN
2A V
IN
2B V
IN
3A V
IN
3B 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.