AnsweredAssumed Answered

AD9957 No output signal

Question asked by Orbel on Apr 10, 2014
Latest reply on Apr 13, 2014 by Orbel

Hello All,

 

I am having some trouble working with AD9957 DAC I have configured it to work. I have configured all registers and all data but at the output I do not see any signal just 0 voltage always no mater if I start transmission or no. Here are the main register values

 

CFR1= 00000000010000000000000000000000

CFR2= 00000000000000000000100000100000

CFR3= 00101011000111110100000101000000

AUX DAC= 00000000000000000111111101111111

IO Update Rate= 00000000000000000000000001100100

Profile0 = 1100100001111111000000000000000000101010100011110101110000101001   (MSB is on the left side and LSB on the rigth side for all this registers)

 

I can read from DAC what I have written.

 

Also I am attaching schematic and screenshot of register configuration.

May be the sequence of starting transmission is wrong that I am doing or I have missed some registers, please advise what to do next.

 

With Best regards

Orbel

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