SERIES AP220 / AP231 ACROPACK
USER
’S MANUAL
Acromag, Inc. Tel: 248-295-0310
- 27 -
http://www.acromag.com
- 27 -
https://www.acromag.com
4.1 Uncalibrated Performance
The uncalibrated performance is affected by two primary error sources.
These are the channel's offset and gain errors. The use of channel specific
calibration coefficients to accurately adjust offset and gain is important
because the worst case uncalibrated error can be significant (although the
typical uncalibrated errors observed may be much less). The maximum
uncalibrated error is summarized as follows.
AP231 Model
AD5761 @ -40oC to 85oC:
Linearity Error is +/- 0.003% FSR maximum (i.e. +/-2 LSB).
Offset Error is +/- 0.05% FSR (i.e. 20V SPAN) maximum.
Gain Error is +/- 0.1% FSR maximum.
Total Error
+/- 0.153% FSR maximum (+/-98.5 LSB)
AP220 Model
AD5721 @ -40oC to 85oC:
Linearity Error is +/- 0.0122% FSR maximum (i.e. +/-0.5 LSB).
Offset Error is +/- 0.05% FSR (i.e. 20V SPAN) maximum.
Gain Error is +/- 0.1% FSR maximum.
Total Error
+/- 0.1622% FSR maximum (+/-6.64 LSB)
Typically, each error component is much less than its maximum and all error
components do not reinforce each other. Thus, typical errors are much less
than that shown above.