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ADAu1701 I2S sometimes works

Question asked by Nakman on Apr 30, 2018
Latest reply on May 4, 2018 by KJBob

We had a project that works on the EVB (from Analog) ,

the input is the ADC it than goes (after some filttering) to 3 I2S outputs at 192K at master mode.

we made 10 boards prototype, only 2 boards are working , all the other have no BCLK out of the ADAu1701 (and all other clocks as well)

all voltages are correct, input clock , PLL_mode are same .

What can cause such a problem ?

can decupling can cause it ?

Regards Ariel