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AD9101

Analog Devices
Part Number AD9101
Manufacturer Analog Devices
Description 125 MSPS Monolithic Sampling Amplifier
Published Mar 23, 2005
Detailed Description a FEATURES 350 MHz Sampling Bandwidth 125 MHz Sampling Rate Excellent Hold Mode Distortion –75 dB @ 50 MSPS (25 MHz V IN...
Datasheet PDF File AD9101 PDF File

AD9101
AD9101

Overview
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 amplifier to be transparent to the low signal level distortion of the sampler.
When sampled, output distortion levels reflect only the distortion performance of the sampler.
Dramatic SNR and distortion improvements can be realized when using the AD9101 with high speed flash converters.
Flash converters generally have excellent linearity at dc and low frequencies.
However, as signal slew rate increases, their performance degrades due to the internal comparators’ aperture delay variations and fini...


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