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need a help about op-amp

lilly
Prodigy 155 points
Other Parts Discussed in Thread: LM324, OPA690

hello!

i am trying to generate 0-10V analog o/p from my Microcontroller by connecting the external op-amp so plz tell me which op-amp is better and what is this rail to rail opa?

  • 0
    Genius 4530 points

    Hi lilly,

    Since you require 0-10V output, the supply voltage has to be atleast 12V. Using a dual supply voltage 0f +/- 12V or above will ensure that you get an accurate 0V output.

    Opamp selection depends on various criteria namely GBW (Gain-Bandwidth product ) that depends on your frequency requirement, Slew rate required, etc.

    The simplest opamp you can use is LM324 if the above requirements are not critical for your application. Besides, other opamps options is OPA690 , etc.

    Rail-to-rail opamp means that the output voltage can go within the range of +/- 0.5V of the supply voltage. This thus increases the dynamic range of output provided by the opamp.

    Regards,

    Sid