• State TI Thinks Resolved
  • Locked Locked
  • Replies 2 replies
  • Answers 2 answers
  • Subscribers 48 subscribers
  • Views 318 views
  • Users 0 members are here
Support feedback
Options
Options
Similar topics

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

OPA182: common mode voltage range

KrnB
Intellectual 600 points
Part Number: OPA182
Other Parts Discussed in Thread: OPA387, OPA187, OPA186

Hello, My application requires lowest possible offset drift  with + / - 5V Dual Supply. I am checking OPA182 in my design but I see the common mode voltage range is  (V–) – 0.1V   to  (V+) -2.5V.

I interpret it that I cannot have my input voltage greater than 2.5V or less than -2.5V when my +VCC is 5+V & -VEE is -5V. Please can you share if my understanding is correct

Can you share a part having lower or equivalent offset drift  meeting my requirement ? I also checked OPA387 but it does not meet the + / - 5V Dual Supply. requirement.

  • 0
    Guru 306790 points

    With ±5 V supplies, the OPA182's input common-mode range is from −5.1 V to +2.5 V.

    The OPA187 has an offset drift of 1 nV/°C, with VCM up to 3 V.
    The rail-to-rail opamp with the lowest offset drift is the OPA186 with 10 nV/°C.

  • 0
    TI__Guru 55466 points

    Thank you Clemens,

    HI KmB,

    Also consider the OPA186, this is a 24-V, low-power, Rail-to-Rail Input and Rail-to-Rail Output Zero drift operational amplifier that will meet your needs:

    https://www.ti.com/product/OPA186

    The input common-mode voltage extends to 0.2V below the negative supply, and 0.2V above the positive supply rails:

    Hence, when powered with ±5V supplies,  the permissible common-mode is ±5.2V

    The maximum offset is ±10μV, offset drift is ±0.04μV/°C.

    Thank you and Kind Regards,

    Luis