To enable single-supply operation, the device features an internal low-dropout regulator (LDO). The LDO is powered by the RVDD supply, and the output is available on the two DECAP pins. This LDO output powers the critical analog blocks within the device, and must not be used for any other external purposes.
Short the two DECAP pins together, and decouple with the GND pin by placing a 1-μF, X7R-grade, ceramic capacitor with a 10-V rating, as shown in Figure 30. There is no upper limit on the value of the decoupling capacitor; however, a larger decoupling capacitor results in a longer power-up time for the device. See the Layout section for layout recommendations.