> So far I found MAX8510 which theoretically has less than 60uVpp noise
> and 78dB PSRR at 1Khz.


Frequently you'll see that this is the best point of a curve over frequency.
The rejection at 100kHz may be dramatically worse.
-- 
http://www.piclist.com PIC/SX FAQ & list archive
View/change your membership options at
http://mailman.mit.edu/mailman/listinfo/piclist