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Question about the AD421 DAC by Analog Devices

Message posted by Eric Myers (eric@americanmagnetics.com : 65.86.47.146) on 08 May 2002 at 14:30:09.

Hello,

I am currently designing a 2-wire HART slave with the A5191HRT (the new 20C15) and the AD421 DAC. I am having some issues with noise on the input signal which is giving false carrier detects. I have been told that this is probably due to noise generated by the AD421. Can somebody tell me if they have experienced this? Also, is there a good way to fix the problem.

Thanks,

Eric.



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