AD7960 Acquisition Problem.  Missing Codes

Hello,

I'd suggest that you look at our reference design below and  make sure that your digital interface is correctly setup.

AD7960 Native FMC Card & Xilinx Reference Design [Analog Devices Wiki]

Which interface mode and ADC driver are you using? Could you share your schematic? Have you followed the layout guidelines from its eval board user guide and placed sufficient decoupling cap (eg. 10uF) on the REF and REFIN pins as close as possible to the ADC?

http://www.analog.com/static/imported-files/user_guides/UG-490.pdf

Regards,

Maithil

Hello,

Just to explain the context. We need to evaluate the AD7960 versus temperature. So we need to expose the DUT to the temperature alone. The ADC is mounted on a daughter board with all decoupling as close as possible. Under this daughter board, there is all the capacitors needed.  10µ with 100n for REF and REFIN pins.  And 100n  for every power pins.

The motherboard is a dedicated board which is connected to Automated Test Equipment (A.T.E.). Through the motherboard you have all the signal conditionning for the analog input, the reference voltages. all decoupling for the supplies.

The design of all parts is based on the specification of the evaluation board.

Hello,

I have sent you a private message.

Regards,
Maithil

Is there any chance to know if this issue has been solved?

We are facing the exact same problem with an AD7980 mounted on a breadboard, leading indeed to not the state of the art for decoupling and so on...

JYL

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