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About Resistance value of MICBIAS for ADAU1977

Question asked by TomY on Feb 26, 2016
Latest reply on Mar 2, 2016 by TomY

Hello, ADI support team

 

Currently, I am referring to Figure 21 of Datasheet as follows.

adau1977_.jpg

 

In this figure, I found a description of "R = TYPICAL 300Ω TO 500Ω".

 

What is this Resistance value specified by?

Is it related to ECM's characteristic?

If possible, could you show how to calculate as step by step, please?


Best regerds,

TomY

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