I have a board where ADMP421 is used. We did a rework (using hot air) and noticed the following behaviour:
+3V3 - is present and correct
GND as well.
L/R - is low
CLK input is 2.048MHz
Data out is present. (See captured image below)
Problem is : there is no any sound coming from do microphone.\
Other board is working correctly
Question - How to check if microphone (the membrane) is not destroyed ?
Thanks in advance.