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Which ADC driver is better to use with 0.9V ADC input common mode voltage and analog inputs matched to 50Ohm. OP1db finding.

Question asked by SergeyB on Nov 27, 2017

Hello, I will use AD9653 (16 bit) to digitize 68Mhz carrier with 12.5Mhz Bandwidth. Which ADC driver is better to use with 0.9V ADC input common mode voltage and analog inputs matched to 50Ohm. I find ADA4930, but it's designed for "...driving 1.8 V high performance ADCs with resolutions up to 14 bits from dc to 70 MHz...". Can I drive  differentially 50-Ohm matched ADC input by thic driver? Drivers which include internal resistive feedback such as ADL5562 has OP1db level in data sheet, how to find OP1db level for ADA4930 with external resistors? I want use driver with Vocm=0.9V and OP1db=15dBm ( 12dBm(2.6Vp-p@50Ohm) + 3db(Pdiff=Ps-e-3dB) ) to safe ADC input from 2.6Vp-p,max.

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