AnsweredAssumed Answered

ADAU1702 crystal startup problem

Question asked by SpeakerDude on Apr 24, 2014
Latest reply on Apr 25, 2014 by SpeakerDude

Hi,

I am having a problem with my crystal in my ADAU1702 design. At power up the crystal does not start oscillating until I touch it with my finger.

 

The crystal I use is 7A-12.288MAAJ-T from TXC. According to the datasheet the load capacitance is 18pF and the shunt capacitance is max 5pF.The capacitors I use is 22pF (NP0)

 

What could be the reason for my oscillator not to start up properly?

 

Thanks and best regards

Markus

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