AD9101

a FEATURES 350 MHz Sampling Bandwidth 125 MHz Sampling Rate Excellent Hold Mode Distortion –75 dB @ 50 MSPS (25 MHz V IN) –57 dB @ 125 MSPS (50 MHz VIN) 7 ns Acquisition Time to 0.1% <1 ps Aperture Jitter 66 dB Feedthrough Rejection @ 50 MHz 3.3 nV/√Hz Spectral Noise Density APPLICATIONS Direct IF Sampling Digital Sampling Oscilloscopes HDTV Cameras Peak Detectors Radar/EW/ECM Spectrum Analysis Test Equipment/CCD Testers DDS DAC Deglitcher GENERAL DESCRIPTION – SAMPLER VIN 125 MSPS Monolithic Sampling Amplifier AD9101 FUNCTIONAL BLOCK DIAGRAM AD9101 + CHOLD + 4X AMP VOUT – 3R R CLOCK CLOCK RTN The AD9101 is an extremely accurate, general purpose, high speed sampling amplifier. Its fast and accurate acquisition speed allows for a wide range of frequency vs. resolution performance. The AD9101 is capable of 8 to 12 bits of accuracy at clock rates of 125 MSPS or 50 MSPS, respectively. This level of performance makes it an ideal driver for almost all 8- to 12-bit A/D encoders on the market today. In effect, the AD9101 is a track-and-hold with a post amplifier. This configuration allows the front end sampler to operate at relatively low signal amplitudes. This results in dramatic improvement in both track and hold mode distortion while keeping power low. The gain-of-four output amplifier has been optimized for fast and accurate large signal step settling characteristics even when heavily loaded. This amplifier’s fast Settling Time Linearity (STL) characteristic causes the ...