• State TI Thinks Resolved
  • Locked Locked
  • Replies 1 reply
  • Answers 1 answer
  • Subscribers 47 subscribers
  • Views 753 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.

OPA381: OPA381 swing to ground

Vladimir Pogonin
Prodigy 95 points
Part Number: OPA381
Other Parts Discussed in Thread: LM7705

Support Path: /Product/Help with Device Selection/

Sometimes ago I used OPA381 as Transimpedance Ampli for OSRAM PD BPW34. I like an option of OPA381 "swing to ground" by ext. resistor.

Have TI another OAs with this capability? May be a competitors devices.

Vladimir, Moscow, Russia

  • 0
    TI__Mastermind 23050 points

    Hi Vladimir,

    This can be done with most CMOS op amps. Here is a TI Precision Design that discusses the modification and how it works: http://www.ti.com/tool/TIPD145
    Don't forget that your input must also be able to accommodate 0V. In most instances, I would say you are better off using a dual supply configuration, but if you're set on the op amp you've chosen and it can't operate off that large of a supply, this can be useful.
    Another thing you can do is use a negative bias generator, such as the LM7705. This device takes in 3-5.25V and outputs -0.232V, allowing the op amp to swing to ground.