From a functional perspective, the device comprises four modules: the low-dropout regulator (LDO), the reference buffer (BUF), the converter (SAR ADC), and the interface (multiSPI digital interface), as shown in the Functional Block Diagram section.
The LDO module is powered by the RVDD supply, and generates the bias voltage for internal circuit blocks of the device. The reference buffer module buffers the external reference voltage source from the dynamic, capacitive switching load present on the reference pins during the conversion process. The converter module samples and converts the analog input into an equivalent digital output code. The interface module facilitates communication and data transfer between the device and the host controller.