The ADC121S021 is a low-power, single channel CMOS 12-bit analog-to-digital converter with a high-speed serial interface.Unlike the conventional practice of specifying performanceat a single sample rate only, the ADC121S021 is fullyspecified over a sample rate range of 50 ksps to 200 ksps.The converter is based upon a successive-approximationregister architecture with an internal track-and-hold circuit.The output serial data is straight binary, and is compatible withseveral standards, such as SPI™, QSPI™, MICROWIRE,and many common DSP serial interfaces.