The AD6644 is a high speed, high performance, monolithic 14 bit analog to digital converter (ADC ). All necessary functions, including track and hold (TH) and reference, are included on-chip to provide a complete conversion solution. The AD6644 provides CMOS compatible digital outputs. It is the third generation in a wideband ADC family, preceded by the AD9042 (12-bit 41 MSPS) and the AD6640 (12-bit 65 MSPS, IF sampling).