The AD9222 is an octal， 12-bit， 40/50/65 MSPS analog-todigital converter （ADC） with an on-chip sample-and-hold circuit designed for low cost， low power， small size， and ease of use. The product operates at a conversion rate of up to 65 MSPS and is optimized for outstanding dynamic performance and low power in applications where a small package size is critical. The ADC requires a single 1.8 V power supply and LVPECL-/ CMOS-/LVDS-compatible sample rate clock for full performance operation. No external reference or driver components are required for many applications. The ADC automatically multiplies the sample rate clock for the appropriate LVDS serial data rate. A data clock output （DCO） for capturing data on the output and a frame clock output （FCO） for signaling a new output byte are provided. Individual-channel power-down is supported and typically consumes less than 2 mW when all channels are disabled.