A have to replace two amplifiers (AD743 and AD546) in one equipment, but I need some equivalent amplifiers because this two are obsolete.
What can be?
Looking at the ADA4898 datasheet the 0.1 to 10 Hz noise trace (fig. 45) is worse than I would expect based on the spectral density plot (fig. 15) and much worse than other op amps with similar voltage noise specifications (for example the AD797…