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ADAU1772 analog input protection

Question asked by RMSacoustics on Apr 5, 2016
Latest reply on Apr 6, 2016 by RMSacoustics

I use the ADAU 1772 in a non-portable circuitry that is supplied with regular +\- 12V supplies.

The ADAU1772  itself is supplied with 3.3V.

This means that the op-amp that precedes the ADAU1772 analog inputs can deliver much more voltage than the analog inputs can handle (Vcc+0.3 - GND-0.3 V).

Now my question is whether the inputs are protected by diodes such that I can prevent overload by a series resistor, like with many C-Mos devices. And if so, what current can these input protecting diodes handle?

 

thanks, Rob

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