I'm looking for help in selecting a chip for an Automatic Gain Control circuit. My requirements are
Input signal: 0.1Hz-100Hz, random waveform, 50mV-4Vpk
Output needs to be an exact replica of the input but normalized to always have a 4.8V peak.
I've run into a few chips that have AGC, like the AD8367 and AD8336, but I'm not sure if they are right for my application.
Thanks for the email, I'm familiar with both of these parts. For such a low frequency application you'll need a VGA designed for dc operation. These are generally lower BW, with specified Vos numbers and dual supply. Your input range is only 80:1 (38dB) so you could use the AD600, AD602, AD603, AD8336 or AD8338. Avoid single supply parts if possible. There are a few agc circuits for guidance, one of them is AN-1341, which I've attached for your convenience.