There is a long thread about interfacing with Current Transformer,
with various frontend circuits suggested and discussed.
Also code examples, although for PIC16 devices.https://www.microchip.com..ums/m845541.aspx#845541
There is an external preamplifier circuit suggested in message
It is not clear to me, wether you are mostly interested in Amplitude or Time of peak value.
Identifying time of peak value in a possibly noisy signal, may be challenging,
and any filtering in hardware or software, is likely to shift the time of the peak.
There is differential current to voltage frontend amplifier in message #30 and 42,
and several alternatives for precision rectifier circuits.
post edited by Mysil - 2019/12/26 07:25:31