Datasheet

AD7859/AD7859L
REV. A
–10–
Table IV. Calibration Selection
CALMD CALSLT1 CALSLT0 Calibration Type
00 0 A full internal calibration is initiated. First the internal DAC is calibrated, then the
internal gain error and finally the internal offset error are removed. This is the default setting.
0 0 1 First the internal gain error is removed, then the internal offset error is removed.
0 1 0 The internal offset error only is calibrated out.
0 1 1 The internal gain error only is calibrated out.
10 0 A full system calibration is initiated. First the internal DAC is calibrated, followed by the
system gain error calibration, and finally the system offset error calibration.
1 0 1 First the system gain error is calibrated out, followed by the system offset error.
1 1 0 The system offset error only is removed.
1 1 1 The system gain error only is removed.
Table IIIa. Channel Selection for AD7859/AD7859L
Differential Sampling (SGL/DIFF = 0)
AMODE CHSLT AIN(+)*AIN(–)* Bipolar or
2 1 0 Unipolar
0 0 0 0 AIN1 AIN2 Unipolar
0 0 0 1 AIN3 AIN4 Unipolar
0 0 1 0 AIN5 AIN6 Unipolar
0 0 1 1 AIN7 AIN8 Unipolar
0 1 x x x x Not Used
1 0 0 0 AIN1 AIN2 Bipolar
1 0 0 1 AIN3 AIN4 Bipolar
1 0 1 0 AIN5 AIN6 Bipolar
1 0 1 1 AIN7 AIN8 Bipolar
1 1 x x x x Not Used
*AIN(+) refers to the positive input seen by the AD7859/AD7859L sample-and-
hold circuitry.
AIN(–) refers to the negative input seen by the AD7859/AD7859L sample-and-
hold circuitry.
Table IIIb. Channel Selection for AD7859/AD7859L
Single-Ended Sampling (SGL/DIFF = 1)
AMODE CHSLT AIN(+)*AIN(–)* Bipolar or
2 1 0 Unipolar
0 0 0 0 AIN1 AGND Unipolar
0 0 0 1 AIN3 AGND Unipolar
0 0 1 0 AIN5 AGND Unipolar
0 0 1 1 AIN7 AGND Unipolar
0 1 0 0 AIN2 AGND Unipolar
0 1 0 1 AIN4 AGND Unipolar
0 1 1 0 AIN6 AGND Unipolar
0 1 1 1 AIN8 AGND Unipolar
1 0 0 0 AIN1 AIN8 Unipolar
1 0 0 1 AIN3 AIN8 Unipolar
1 0 1 0 AIN5 AIN8 Unipolar
1 0 1 1 AIN7 AIN8 Unipolar
1 1 0 0 AIN2 AIN8 Unipolar
1 1 0 1 AIN4 AIN8 Unipolar
1 1 1 0 AIN6 AIN8 Unipolar
1 1 1 1 AIN8 AIN8 Unipolar