Cirrus Logic CDB5532U - Manual (Page 9)

CDB5532U
DS807DB1 9
Calibration Window: The Calibration window (Figure 4) permits the user to access the calibration regis-
ters for each channel of the CS5532 and also perform self and system offset or gain calibrations on either
of the channels. Prior to performing calibrations however, the channel setup registers should be modified
to configure the part for the desired operating mode (see the section ‘Setup Window” on page 7 for more
details). Note that offset calibration should be performed before gain calibration to ensure accurate re-
sults. Refer to the CS5532 datasheet for more details.
Figure 4. CDB5532U Calibration Window
Self Offset or Gain Calibrations:
1) Pull down the Self Offset or Self Gain box, and select the setup number you want to use to cali-
brate the channel.
2) The offset and gain register values will automatically update when the calibration is completed.
System Offset Calibrations:
1) Attach a grounded input to the physical channel you want to calibrate. Note that the grounded input
must be within the common mode range of the particular amplifier (1x-64x) for proper operation.
2) Pull down the System Offset box, and select the setup number you want to use to calibrate the
channel.
3) When the calibration is complete, the screen will automatically update the offset and gain registers
with the new values.
System Gain Calibrations:
1) Attach a full-scale input to the physical channel you want to calibrate.
2) Pull down the System Gain box, and select the setup number you want to use to calibrate the
channel.
3) When the calibration is complete, the screen will automatically update the offset and gain registers
with the new values.