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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…

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  • Hi  ,

    Here are some of my insights regarding your concerns:

    • What will be your specific application? If your application needs only one input.
    • On the other hand, you have another concern regarding the output voltage if you will put 0 as your input. What is the output you are getting when your input is 0 V?
    • And what is your configuration if you are expecting to get the 0x00000 or 0xfffff

    Let me know if these insights will be a help to your concern. So that I could further assist you.


    Regards,
    Jo

  • 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 an output of 0x000000 or 0xFFFFFF; it can also swing to 0x000001. Since the midscale is near to 1 LSB. On the other hand, noise within the system could also be a factor for the swinging of the output. 

    Let me know if any of these insights will be a help to you. So that I could further assist you.


    Regards,
    Jo

Reply
  • 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 an output of 0x000000 or 0xFFFFFF; it can also swing to 0x000001. Since the midscale is near to 1 LSB. On the other hand, noise within the system could also be a factor for the swinging of the output. 

    Let me know if any of these insights will be a help to you. So that I could further assist you.


    Regards,
    Jo

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