ADAU1772 Differential Mics
Hello,
I am wondering if the ADAU1772 is setup to handle differential mics. The data sheet does not explicitly mention differential inputs, like some of the other ADAU parts, but the way the input is drawn to the PGA it looks like it can.
Thanks,
-Sal
adau1772
Integrated/Special Purpose A/D Converters
Audio CODECs
This was never answered, and I am similarly curious if the AINREF pins are indeed usable as noninverting inputs to the PGA, such that the AIN inverting input pins can be AC coupled to ground with a suitable capacitor for their input impedance according to gain. It seems from the eval kit schematic that CM must be internally connected to AINREF across some resistance, but my only -1772 is attached to a PCB that has all of those pins in common, so I can't measure for myself at the moment. If so, that would make for a very handy way to implement preemphasis, saving me a lot of external components!
Jon
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EZ Admin
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