Measurement Computing PCI-DAS1602/12 - Manual (Page 21)

PCI-DAS1602/12 User's Guide Calibrating the PCI-DAS1602/12
20
Analog output calibration
Analog output circuits are calibrated for offset and gain. Coarse and fine offset adjustments are made in the
output buffer section. The tuning range of these adjustments allows for maximum DAC and output buffer
offsets. Coarse and fine gain calibration is performed via adjustments to the DAC reference.
The analog output calibration system is shown in Figure 6. This circuit is duplicated for both DAC0 and DAC1.
Ref
DAC
Gain
Adjust
Analog Out
Offset
Adjust
Trim DAC
Coarse
Trim DAC
Fine
Trim DAC
Figure 6. Analog output calibration