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TLV320AIC3120 EVM Mic

Tyler Steane
Prodigy 90 points
Other Parts Discussed in Thread: TLV320AIC3120

Hi,

I am working with the TLV320AIC3120 EVM board and trying to get the mic input working, I have tried 3 different PC mics plugged into J2 with the W2 & W3 jumper set to apply bias, I have then connected the signal though on in the GUI (SLAC366a) and I have monitored the signal at the AGC and can see a spike when I plug a mic in but still get no output.

I have been able to get some output by applying a 20mV signal from a signal generator to J2 but can’t think why this works and my mics don’t

Any ideas?

 

Thanks

Regards