• State Resolved
  • Locked Locked
  • Replies 2 replies
  • Subscribers 49 subscribers
  • Views 475 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.

OPA2228: Unity gain stable

Darren Jenkins
Genius 11716 points
Part Number: OPA2228
Other Parts Discussed in Thread: OPA2227, , OPA228, OPA227

Hello Amps team,

Is the OPA2228 unity-gain stable?  The datasheet appears to avoid saying it.  It only states for the OPA2227.  Even page 9 shows the frequency response for G=5.

Thanks,

Darren

  • +1
    TI__Guru 60111 points

    Hi Darren,

    In section of 8.2.2.1 of the datasheet, it is stated that OPA228 is intended for an application with Gain >= 5V/V. If you need unity gain op amp, you may have to select OPA227. 

    OPA228 is uncompensated amplifier and external compensation is required if lower gain (< 5V/V) is needed. In other words, OPA228 will not be unity gain stable. 

    If you have additional questions, please let us know.

    Best,

    Raymond

  • 0 in reply to Raymond Zhang1
    TI__Genius 11716 points

    Thank you Raymond.

    Darren