Measurement Computing PCI-DAS1602/16 - Manual (Page 20)

PCI-DAS1602/16 User's Guide Calibrating the PCI-DAS1602/16
19
Analog output calibration
The analog output circuits are calibrated for both gain and offset. Offset adjustments for the analog outputs are
made in the output buffer section. The tuning range of this adjustment allows for maximum DAC and output
buffer offsets. Gain calibration of the analog outputs is performed via DAC reference adjustments.
The analog output calibration system is shown in Figure 6. This circuit is duplicated for both DAC0 and DAC1.
Ref
D/A
Gain
Adjust
Analog Out
Offset
Adjust
Trim DAC
Coarse
Trim DAC
Fine
Trim DAC
Coarse
Trim DAC
Fine
Figure 6. Analog output calibration