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AD4030 Output Code

Product Number: AD4030

I performed some measurements on the AD4030 evaluation board.

The data acquisition was carried out using custom firmware rather than the ACE environment.

The initial measurements I conducted involved zeroing both the IN0+ and IN0- inputs by connecting two 50-ohm SMA termination resistors.

The output codes of the ADC were all very close to the 8388607 code, with only a very small deviation at the LSBs.

When I applied 1 VDC to one input while the second one was connected to the ground (i.e., grounded), the output codes were approximately 0.5 VDC.

When I applied 2 VDC to one input and connected the negative input to the ground, the output code produced approximately 1 VDC.

Is there any explanation for this functional behavior?

With a zero input, shouldn't the output code also be around 0, i.e., either 0x00000 or 0xffffff?

This revised version corrects some minor grammar issues, improves clarity, and ensures consistency in terminology and style.
[edited by: elsiesemico at 1:54 PM (GMT -4) on 26 Sep 2023]

Top Replies

    •  Analog Employees 
    in reply to NathanT +2 verified

    Hi  ,

    You could also use ACE software to check whether you will still get the output of 0.5 V if your input voltage is 1 V. Also, you were right about the 0 V input being able to be able to get…