OPAMP not gaining up the signal

Discussion in 'General Electronics Chat' started by Engineer_tech, Dec 16, 2014.

  1. Engineer_tech

    Thread Starter Member

    Sep 19, 2014
    31
    1
    HI
    i have an opamp (opa211) setted up in non inverting configuration with R2(feedback) resistor value as 100k and R1 as 1K. I need a gain of around 100.
    Applying a signal to the input of the Amp i am not able to get an amplified signal at the output.The output i am getting is little bit amplified version of the input.Apparently i have rechecked the connections, i don't see any loose wire or bad connection.i am not sure what the problem could be.
    I have attached the pin configuration Diagram for OPa211.
    Here is the details of the input i Applied to the Amp.
    V+=10V
    V-=-10V
    In+=sine wave 500mV p-p
    In- =grounded
    please comment
    Thanks
     
  2. MrChips

    Moderator

    Oct 2, 2009
    12,440
    3,361
    Are you able to post a well focused photo of your breadboard layout?
     
  3. ericgibbs

    AAC Fanatic!

    Jan 29, 2010
    2,503
    380
    hi Eng,
    I make that a gain of 101, so a 0.5Vppk would require an output swing of ~50 Vppk !!!

    E
    EDIT:
    Whats the Vin frequency?
     
  4. wayneh

    Expert

    Sep 9, 2010
    12,118
    3,042
    You can't get more than 20X gain without clipping the sine wave.
     
  5. crutschow

    Expert

    Mar 14, 2008
    13,006
    3,232
    Double check all your connections and component values.
    Do you have the power supply's common point connected to ground?
    Post a compete circuit diagram.
     
  6. Engineer_tech

    Thread Starter Member

    Sep 19, 2014
    31
    1
    Thank you all i figured it out actually the op amp was damaged i replaced it with a new one and now i can get an amplified version of the input signal.
    This is such a nice knowledge sharing platform.i thank all the contributors for making it a very nice learning platform.

    Regards,
    Ali
     
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