NuDAQ ACL-8112 Series, User Manual

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Registers Format
•
31
S.E. : Single-ended Analog Input
D.I. : Differential Analog Input
4.4 A/D Range Control Register
The A/D range register is used to adjust the analog input ranges for A/D
channels. Two factor will effect the input range: Gain and Bipolar/Unipolar.
For ACL-8112PG, This register contols the PGA( programmable gain)
directly and there is no Unipolar setting. When different gain value is set,
the analog input range will be changed. For ACL-8112DG/HG, both of
these issues can be controlled by this register. The Table 4.2 shows the
relationship between the register data and the A/D input range.
Address : BASE + 9
Attribute: write only
Data Format:
Bit 7 6 5 4 3 2 1 0
BASE+9 X X X X G3 G2 G1 G0
G0~G3: Gain / Range selection, G3 is not used for ACL-8112PG
( This table is only for ACL-8112HG: High Gain Card)
G3 G2 G1 G0 GAIN
Bipolar
or
Unipolar
Input Range
0 0 0 0 1 Bipolar
±
5V
0 0 0 1 10 Bipolar
±
0.5V
0 0 1 0 100 Bipolar
±
0.05V
0 0 1 1 1,000 Bipolar
±
0.005V
0 1 0 0 1 Unipolar 0V ~ 10V
0 1 0 1 10 Unipolar 0V ~ 1V
0 1 1 0 100 Unipolar 0V ~ 0.1V
0 1 1 1 1,000 Unipolar 0V ~ 0.01V
1 0 0 0 0.5 Bipolar
±
10V
1 0 0 1 5 Bipolar
±
1V
1 0 1 0 50 Bipolar
±
0.1V
1 0 1 1 500 Bipolar
±
0.01V
1 1 0 0 1 Unipolar N/A
1 1 0 1 10 Unipolar N/A
1 1 1 0 100 Unipolar N/A