Specifications

146
discrepancy is less then 2 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 2 LSB.
4. Adjust the BIPOLAR offset voltage. First, writing any value to
BASE+9 to clear FIFO. Then to set A/D channel to channel 0, and
to set the range as –5 V to +5 V.
5. Writing the value from 0x0000 to 0x00FF 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.
6. Adjust UNIPOLAR offset voltage. First, writing any value to
BASE+9 to clear FIFO. Then to set A/D channel to channel 0, and
to set the range as 0 V to 10 V.
7. Writing the value from 0x0100 to 0x01FF 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.
8. Adjust GAIN offset voltage. First, writing any value to BASE+9