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Sigma Delta ADCs

Discussion in 'Electronic Design' started by Sanjayan Vinayagamoorthy, May 5, 2004.

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  1. Hello,

    I was trying to learn how SD/DS (I am not sure which is correct) ADCs
    work. The advantages of 1st order vs higher order ones, and I was
    hoping that someone here would point me in the right direction. I have
    access to Simulink and MATLAB as well as Spice, but I don't have any
    examples of how I can use them in a simple building block to see how
    they fit together. Could someone give me directions as to where I can
    find weblinks or papers that can help me on the building blocks of SD
    ADCs (or even for that matter SD modulation etc?).

    Thanks in advance,

    Regards,
    Sanjay
     
  2. Uddo Graaf

    Uddo Graaf Guest

    Look for Burr Brown DAC datasheets. They have some info on them.

    but Delta Sigma DAC/ADC's are nothing more than integrators, i.e. an op-amp
    with a capacitor in the feedback loop, controlled by a digital pulsetrain.
    The numer of pulses charge the capacitor and increase the voltage output (in
    the case of DS DAC's).
     
  3. CFoley1064

    CFoley1064 Guest

    Sigma Delta ADCs
    Analog Devices has provided a good application note you might want to look at:

    http://www.analog.com/UploadedFiles/Application_Notes/42915257172450549236
    80458171AN283.pdf

    Good luck
    Chris
     
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