There are 6 different wetting current settings (0 mA, 1 mA, 2 mA, 5 mA, 10 mA, and 15 mA) that can be programmed by configuring the WC_CFG0 and WC_CFG1 registers. 0 mA is selected by default upon device reset.

To monitor resistor coded switches, a lower wetting current setting (1 mA, 2 mA, or 5 mA) is generally desirable to get the resolution needed to resolve different input voltages while keeping them within the ADC full-scale range (0 V to 6 V). Higher wetting current settings (10 mA and 15 mA) are useful to clean switch contact oxidation that may form on the surface of an open switch contact. If switch contact cleaning is required for resistor coded switches, the clean current polling (CCP) feature (Refer to Section 8.4.3.1) can be activated to generate short cleaning pulses periodically using higher wetting current settings at the end of every polling cycle.

The accuracy of the wetting current has stronger dependency on the V_S voltage when V_S voltage is low. The lower the V_S voltage falls, the more deviation on the wetting currents from their nominal values. Refer to I_{WETT (CSO)} and I_{WETT (CSI)} specifications for more details.