+ Post New Thread
Results 1 to 6 of 6
  1. #1
    Junior Member level 3
    Points: 2,600, Level: 11

    Join Date
    Jun 2001
    Location
    SERBIA
    Posts
    30
    Helped
    1 / 1
    Points
    2,600
    Level
    11

    negative voltage reference

    HOW TO DO THAT!


    thanx in advance!

    •   AltAdvertisement

        
       

  2. #2
    Advanced Member level 2
    Points: 7,682, Level: 20
    cedance's Avatar
    Join Date
    Oct 2003
    Location
    Germany
    Posts
    551
    Helped
    35 / 35
    Points
    7,682
    Level
    20

    negative reference voltage

    hi,

    what technology does it use? TTL or ECL like that. i think only ECL logic has a negative reference voltage. for it to not enter the saturation region. that is all i am able to resolve abt this problem. but, anyother person could help with this question. seems a good question.

    regards,
    Arun.



    •   AltAdvertisement

        
       

  3. #3
    Advanced Member level 4
    Points: 11,937, Level: 26

    Join Date
    Jul 2001
    Posts
    1,059
    Helped
    93 / 93
    Points
    11,937
    Level
    26

    negative voltage reference ic

    I think you could use an OP Amp to invert the voltage, but this solution will drop more current from the supply and you need positive and negative supply.

    best regards



    •   AltAdvertisement

        
       

  4. #4
    Advanced Member level 4
    Points: 15,991, Level: 30

    Join Date
    Mar 2002
    Posts
    1,309
    Helped
    59 / 59
    Points
    15,991
    Level
    30

    negative output voltage reference

    This is very simple.
    Just connect a MAX826 to your LM385 output:
    http://www.maxim-ic.com/appnotes.cfm/appnote_number/824



  5. #5
    Advanced Member level 4
    Points: 15,991, Level: 30

    Join Date
    Mar 2002
    Posts
    1,309
    Helped
    59 / 59
    Points
    15,991
    Level
    30

    lm385

    Quote Originally Posted by ME
    This is very simple.
    Just connect a MAX826 to your LM385 output:
    http://www.maxim-ic.com/appnotes.cfm/appnote_number/824
    Be aware, there is an error in this application note.
    The application note is about MAX828, but at the schematic it says MAX826.
    Just use a MAX828, there is no IC called MAX826, it's just a typing error.

    MAX828: http://www.maxim-ic.com/quick_view2.cfm/qv_pk/1412



    •   AltAdvertisement

        
       

  6. #6
    Advanced Member level 4
    Points: 15,991, Level: 30

    Join Date
    Mar 2002
    Posts
    1,309
    Helped
    59 / 59
    Points
    15,991
    Level
    30

    positive and negative voltage reference

    You can also use these devices similar to Maxim MAX828:
    Sipex SP6828: www.sipex.com/products/pdf/sp6828_6829.pdf
    ON Semiconductor MAX828: http://www.onsemi.com/site/products/...MAX829,00.html
    National Semiconductor LM828: www.national.com/pf/LM/LM828.html
    Analog Devices ADM8828: http://www.analog.com/productSelecti...DM8828_9_a.pdf
    Microchip (TelCom Semiconductor) TCM828: http://www.microchip.com/1010/pline/...m828/index.htm



--[[ ]]--