Cirrus Logic CRD5490 - Manual (Page 15)

CRD5490-Z
DS988RD1 15
3.3.5 Calibration Tab
The Calibration tab is used to write and display to the CS5490 offset and gain calibration registers. The built-in
calibration sequences of the CS5490 that are used to set the calibration register can be initiated from the Calibration
tab. AC offset and gain calibration can be performed on the voltage channel, the current channel, or both
simultaneously. Refer to the CS5490 data sheet, entitled Two Channel Energy Measurement IC, and Application
Note AN366, entitled CS5480/84/90 Energy Measurement IC Calibration, for more details on calibration. The
Calibration tab is illustrated in Figure 14.
To access the Calibration tab, conversion must be stopped. Otherwise, the Quick Measurements tab will be
displayed with the error message shown in Figure 15.
The Refresh button updates the contents of the screen by reading all the register values from the CS5490. It is
recommended to click the Refresh button when entering the Calibration tab or after modifying any registers to reflect
the current status of the CS5490.
Figure 14. Calibration Tab
Figure 15. Quick Measurements Tab with Error Message Displayed (Partially Illustrated)