Ad650 freq to volt circuit question.

Discussion in 'General Electronics Chat' started by Tony Elliott, Feb 8, 2016.

  1. Tony Elliott

    Thread Starter Member

    May 8, 2015
    140
    2
    Hi All About Circuits,

    I have built a AD650 frequency to voltage circuit as I want to see if I can get better results than the lm2907n f/v converter.

    I have a question as I am having no voltage response on my multimeter and the bench power supply is not pulling any current which is unusual.

    I have looked at my circuit and all connections are fine but I see on the schematic (Schematic is on page 11, fig13)
    http://www.analog.com/media/en/technical-documentation/data-sheets/AD650.pdf
    there is an ANALOG GND on pin 11. I have never seen this before on a circuit and there is DECOUPLING AND GROUNDING paragraph on page 12 which is a little above my skill set at this present time. Any solutions welcome please???
     
  2. bertus

    Administrator

    Apr 5, 2008
    15,648
    2,347
    Hello,

    In figure 13, as shown here:

    AD650_sample_schematic.png

    There are the analog and digital grounds connected.

    Bertus
     
  3. Tony Elliott

    Thread Starter Member

    May 8, 2015
    140
    2
    Yes this is the schematic, what is the difference between analog and digital grounds??
     
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