User`s manual

Exp-A/D12
68 s Software Reference
A/D Conversion Modes
When reading the Exp-A/D12, specify the desired gain and polarity
(unipolar or bipolar) by selecting a particular A/D Mode from Table 8-1.
There are 18 different A/D modes listed. ANx is one of the eight multi-
plexed input signals, where x ranges from 0 to 7.
When reading a differential input signal, connect the device output to both
ANx+ and ANx. When reading a single-ended signal (A/D modes 27 or
1017), connect the device output to ANx+ and connect ANx to ground.
No ground is necessary when reading a single-ended signal (A/D modes 0,
1, 8 or 9). Simply connect the device output to the desired terminal (ANx+
or ANx).
Table 8-1. Exp-A/D12 A/D Conversion Modes
Mode Gain A/D Converter Chip Reads...
01XANx+ unamplified, bipolar mode
11XANx– unamplified, bipolar mode
2 2X difference between ANx+ and ANx–, bipolar
3 202X difference between ANx+ and ANx–, bipolar
4 22X difference between ANx+ and ANx–, bipolar
5 42X difference between ANx+ and ANx–, bipolar
6 102X difference between ANx+ and ANx–, bipolar
7 6X difference between ANx+ and ANx–, bipolar
81XANx+ unamplified, unipolar mode
91XANx– unamplified, unipolar mode
10 2X difference between ANx+ and ANx–, unipolar
11 202X difference between ANx+ and ANx–, unipolar
12 22X difference between ANx+ and ANx–, unipolar
13 42X difference between ANx+ and ANx–, unipolar
14 102X difference between ANx+ and ANx–, unipolar
15 6X difference between ANx+ and ANx–, unipolar
16 1X difference between IN+ and IN–, bipolar
17 1X difference between IN+ and IN–, unipolar