Category: Hardware
Product Number: AD8338
Hello! Below is the AGC circuit I designed for an AC coupled square wave input. I am using single-ended input thus connected INMR to the ground through C1. COMM and MODE are grounded. I have a bypass capacitor at VBAT and VAGC as well.
I have tested the circuit with VAGC = 2V and inputs of square wave 0.5-5MHz and the outputs OUTP and OUTM are oscillating. The output pins contain a 2.5MHz square wave for any given input. I have tried changing the VAGC values and the same output is observed for VAGC = 0.5-3V, below 0.5 and above 3V there is no output. Any idea what I am missing here? Thanks in advance!
Edit Notes
tested VAGC at 2V as the optimal operation[edited by: Egecan at 10:50 AM (GMT -5) on 3 Dec 2025]
