8
Calibration
ADS126xEVM Software
3.4.8
Tab 8: Calibration
Tab 8 (shown in
) allows for reading and writing of the offset and full-scale (gain) calibration
registers. The ADC2 offset and gain calibration registers are only available when the ADS1263EVM is
connected.
Figure 24. Tab 8: Register Map
Program the calibration coefficients manually into the registers, or send the corresponding SPI calibration
command. Click an SPI command button to run the selected calibration routine. During a calibration
routine,
CAL in Progress?
lights up to show that the calibration process is ongoing. If the calibration
completes successfully,
CAL Completed?
lights up. If
CAL Completed?
does not light up, run the
calibration again.
The calibration coefficients are converted to their practical units in the
Offset
and
Gain
indicators. Note
that the units of
Offset
can be changed from
uV
to
mV
as needed.
Calibration is not required; however, calibration improves overall ADC accuracy by about an order of
magnitude.
27
SBAU206 – April 2015
ADS126xEVM-PDK
Copyright © 2015, Texas Instruments Incorporated