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AD5668 output goes to zero occasionally

Question asked by ricky on Nov 7, 2014
Latest reply on Nov 13, 2014 by ricky

Hi All,

 

One of my customer builds his prototype board using AD5668 DAC, and its output goes to zero occasionally.

During his fixing work, one question comes up as next;

 

Powered up his board, at Vdd=5V, Vref=Vdd.

/SYNC, DIN, SCLK terminal voltages are logic low, and /LDAC, /CLR terminal is logic high.

Analog output is 2.5V (mid scale).

Next step, /CLR goes to low.

He would like to confirm that the analog output should goes to zero or should stay 2.5V or else?

He understand that this condition is not normal, however he would like to know it in order for find a clue to his problem.

 

Best Regards,

Ricky

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