AD7858/AD7858L

REV. B

–11–

Table III. Channel Selection

SGL/

DIFF

CH2

CH1

CH0

AIN(+)*

AIN(–)*

0

0

0

0

0

0

0

1

0

0

1

0

0

0

1

1

0

1

0

0

0

1

0

1

0

1

1

0

0

1

1

1

1

0

0

0

AGND

1

0

0

1

AGND

1

0

1

0

AGND

1

0

1

1

AGND

1

1

0

0

AGND

1

1

0

1

AGND

1

1

1

0

AGND

1

1

1

1

AGND

*AIN(+) refers to the positive input seen by the AD7858/AD7858L sample and hold circuit,

Table IV. Calibration Selection

CALMD

CALSLT1

CALSLT0

Calibration Type

0

00A Full Internal Calibration is initiated where the Internal DAC is calibrated

followed by the Internal Gain Error, and finally the Internal Offset Error is

calibrated out. This is the default setting.

0

0

1

Here the Internal Gain Error is calibrated out followed by the Internal Offset

Error calibrated out.

0

1

0

This calibrates out the Internal Offset Error only.

0

1

1

This calibrates out the Internal Gain Error only.

1

00A Full System Calibration is initiated here where first the Internal DAC is

calibrated followed by the System Gain Error, and finally the System Offset

Error is calibrated out.

1

0

1

Here the System Gain Error is calibrated out followed by the System Offset

Error.

1

1

0

This calibrates out the System Offset Error only.

1

1

1

This calibrates out the System Gain Error only.