Specifications

150
corresponding D/A registers (BASE+10 and BASE+12).
7. Writing the value from 0x0600 to 0x06FF sequentially to
Calibration Command and Data register (BASE+18), and get
each bipolar range’s data by software trigger A/D method. Be
noted that to repeat this procedure 1000 times then to average
those data for each value. After that, to see whether the
discrepancy is less then 0.4 LSB. If so, to go to next step.
Otherwise, you must change the value and repeat all the procedure
in this step again until the discrepancy is less then 0.4 LSB.
8. Adjust UNIPOLAR offset calibration. First, writing any value to
BASE+9 to clear FIFO. Then to set the A/D range as -5 V to +5 V,
and to set the D/A range as 0 V to 5 V. Next, writing 0x8000 to
corresponding D/A registers (BASE+10 and BASE+12).
9. Writing the value from 0x0600 to 0x06FF sequentially to
Calibration Command and Data register (BASE+18), and get
each bipolar range’s data by software trigger A/D method. Be
noted that to repeat this procedure 1000 times then to average
those data for each value. After that, to see whether the average
data is close to 32767.5. If so, to go to next step. Otherwise, you
must change the value and repeat all the procedure in this step
again until the average data close to 32767.5.
10. Repeat steps 2 to 9 several times.