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AD7323
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.
Rev. 0 | Page 25 of 36
MSB
16
Write
15
Register Select 1
14
Register Select 2
13
V
IN
0
12
V
IN
1
11
V
IN
2
10
V
IN
3
9
0
8
0
7
0
6
0
5
0
4
0
3
0
2
0
LSB
1
0
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
16
Write
15
Register Select 1
14
Register Select 2
13
V
IN
0A
12
V
IN
0B
11
V
IN
1A
10
V
IN
1B
9
V
IN
2A
8
V
IN
2B
7
V
IN
3A
6
V
IN
3B
5
0
4
0
3
0
2
0
LSB
1
0
Table 13. Range Selection
V
IN
xA
0
0
1
1
V
IN
xB
0
1
0
1
Description
This combination selects the ± 10 V input range on V
IN
x.
This combination selects the ±5 V input range on V
IN
x.
This combination selects the ± 2.5 V input range on V
IN
x.
This combination selects the 0 V to +10 V input range on V
IN
x.
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