Thanks again for all the comments. Very interesting especially the
reasoning behind the designs.
The device I've picked for my design is the LTC6228. This is a new
device by Analog Devices that only came out late last year. The voltage
noise is 0.88 uV/sqrt Hz and the current noise is 3 pA/sqrt Hz. Claimed
output IP product performance is <-100 dBc at 4V peak to peak output.
The device is available in SOT-23 package from DigiKey and Mouser.
I'm planning to use the imminent coronavirus lockdown over here in the
UK to get some PCB designs done.
73, Chris G4HYG
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