Hello,
I am designing a system with an RF front end which is converted by an ADC. I use an AD8132 as a single-ended to differential converter.
I have tested this chain thanks to the evaluation breakboard EVAL-FDA-1 and everything was OK. But now on my custom PCB, the AD8132 output is unexpected. You can find the schematic implemented on my PCB and the input signal level (It is consistent on my new PCB and the breakboard) :
Unfortunately now on my PCB the output is inverted (the positive output is below the negative output and inverted), moreover the output voltage level is very low. As it can't be a schematic mistake(check during a couple of days), I assume is a PCB routing one.
Do you have any clue why this behaviour happens? Which rules are compulsory to implement in the PCB layout to avoid any critical issues ?
Thank you so much for your future help.
Adrien
