AD9283-100 reference voltage

Hi! 

I am using AD9283-100 operating at 50MHz. Ian using internal reference. I am always getting output code as all zeros. When I monitored the Vref at Pin 2 and Pin 3 shorted to ground I am getting 1.82V instead of specified 1.25V. what could be the reason.

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  • Hi, I have shorted 2 &3 and through 0.1uF connected to ground as shown in evaluation board schematic. Input is single ended AC coupled. When I measured voltage on Pin 6 it reads 1.82V which is same as Vref I monitored. But on pin 7 it shows 0v. Common mode voltage of Vref should be there on both the input pins.

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