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AD7322
Preliminary Technical Data
RANGE REGISTER
The Range register to used to select one Analog input Range per Analog input channel. It is a 4-Bit write only Register, with two dedicated
Range bits for each of the two Analog Input Channels. There are four Analog input Ranges to choose from, ±10V, ±5V, ±2.5V, 0 to 10V. A
write to the Range Register is selected by setting the Write bit to 1 and the Register Select bit to 1. Once the initial write to the Range
Register occurs the AD7322 automatically configures the two Analog inputs to the appropriate range, as indicated by the Range register,
each time any one of these analog input channels is selected. The ±10V input Range is selected by default on each analog input channel.
See
.
Table 12
Table 12. Range Register
Write
Register
Select 1
Register
Select 2
Vin0A
Vin0B
Vin1A
Vin1B
VinXA VinXB
Description
0
0
This combination selects the ± 10V
Input Range on Analog Input X.
0
1
This combination selects the ±5V Input
Range on Analog Input X.
1
0
This combination selects the ± 2.5V
Input Range on Analog Input X.
1
1
This combination selects the 0 to 10V
Input Range on Analog Input X.
Rev. PrE | Page 14 of 18
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