The sequence of the calibration event itself may be adjusted. This feature can be used if a shorter calibration time than the default is required; see t_CAL in Converter Electrical Characteristics: AC Electrical Characteristics. However, the performance of the device may be compromised when using this feature.

The calibration sequence may be adjusted through the CSS bit of the Calibration Adjust register (Addr: 4h; Bit: 14). The default setting of CSS = 1b executes both R_IN and R_{IN_CLK} calibration (using Rtrim) and internal linearity calibration (using Rext). Executing a calibration with CSS = 0b executes only the internal linearity calibration. The first time that calibration is executed, it must be with CSS = 1b to trim R_IN and R_{IN_CLK}. However, once the device is at its operating temperature, and R_IN has been trimmed at least one time, it does not drift significantly.