AD9101

Features:

350 MHz Sampling Bandwidth
125 MHz Sampling Rate
Excellent Hold Mode Distortion
        75 dB @ 50 MSPS (25 MHz VIN)
        57 dB @ 125 MSPS (50 MHz VIN)
7 ns Acquisition Time to 0.1%
<1 ps Aperture Jitter
66 dB Feedthrough Rejection @ 50 MHz


Application

Direct IF Sampling
Digital Sampling Oscilloscopes
HDTV Cameras
Peak Detectors
Radar/EW/ECM
Spectrum Analysis
Test Equipment/CCD Testers
DDS DAC Deglitcher


Pinout




Specifications

Supply Voltage (+VS)  . . . . . . . . . . . . . . . . . . . . 0.5 V to +6 V
Supply Voltage (VS)  . . . . . . . . . . . . . . . . . . . . 6 V to +0.5 V
Analog Input Voltage  . . . . . . . . . . . . . . . . . . . . . . . . . . . .±5 V
Continuous Output Current⁴  . . . . . . . . . . . . . . . . . . . .  70 mA
Storage Temperature  . . . . . . . . . . . . . . . . . 65°C to +150°C
Operating Temperature Range
AE, AR . . . . . . . . . . . . . . . . . . . . . . . . . . . .      40°C to +85°C
SE  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .     55°C to +125°C

Description

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 finite gain bandwidth product.