The AD9857 is a 200 MHz 14-bit digital upconverter produced by Analog Devices. It has a 4× to 20× programmable reference clock multiplier, an internal 32-bit quadrature DDS, FSK function, 8-bit output amplitude control, a single pin power-down function, four programmable, pin-selectable signal profiles, SIN(x)/x correction (inverse SINC function), a simplified control interface, 10 MHz serial, 2-wire or 3-wire SPI compatible, 3.3 V single supply, single-ended or differential input reference clock, 80-lead LQFP surface-mount packaging, three modes of operation: quadrature modulator mode, single-tone mode, interpolating DAC mode, and is mainly used in HFC data, telephony and video modems, wireless base station, Agile, L-Band satellite communication and other applications.