ad8352: IF gain stage

Document created by analog-archivist Employee on Feb 23, 2016
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i would like to use the ad8352 as an IF gain stage,with single-ended input &
single-ended output with spec : g=17db oip3>=40dbm @ freq=60mhz.

 

The AD8352 is a differential amplifier, so for a single-ended interface the
easiest thing you can do is use input and output transformers. The eval board
uses a very broadband 1:1 transmission line balun for balanced to unbalanced
signal conversion. We are forced to use fairly lossy resistive pads for
matching. For a 60MHz application the attached implementation should work well
with very low loss. In order to achieve 17dB of gain from single-ended to
single-ended input/output 50-Ohm ports, I suggest using an RG of 61.9Ohms, and
RD of 4.3kOhm and a CD of 0.5pF.

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