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[ADuM7234(CN0196)] VDDA voltage drop caused by DC voltage input

Question asked by tmineno Employee on Oct 2, 2014
Latest reply on Oct 2, 2014 by MMA

Hi All,

 

When I tested ADuM7234 by using CN0196 board, I faced a problem below.

When  the input voltages(PWM1 and PWM0 pins) are DC(duty cycle 100% or 0%), I think output (PWM_Q1 to Q4) should be DC but PWM_Q1 and VDDA2 dropped to low level periodically (see attached file).

I'd like to know the reason why this behavior is occurred on CN0196.

Could anyone tell me above things?

 

Regards,

 

Taiki

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