Measurement Computing PCI-DAS64/M2/16 - Manual (Page 24)

PCI-DAS64/M2/16 User's Guide Calibrating the PCI-DAS64/M2/16
The analog output circuits are calibrated for gain and offset. Gain calibration of the analog outputs is performed
via DAC reference adjustments. Offset adjustments for the analog outputs are made in the output buffer section.
The tuning range of this adjustment yields maximum DAC and output buffer offsets.
The calibration scheme for the analog out section is shown in . This circuit is duplicated for both
DAC0 and DAC1
Figure 5-3
Figure 5-3. Analog out calibration
Ref
DAC
Gain
Adjust
Analog
Out
Offset
Adjust
Trim DAC
Coarse
Trim DAC
Fine
Trim DAC
Coarse
Trim DAC
Fine
5-3