• State
  • Locked Locked
  • Replies 1 reply
  • Subscribers 47 subscribers
  • Views 1901 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.

OPA657 Output Impedance with no load

Al Duarte
Prodigy 210 points
Other Parts Discussed in Thread: OPA657

OPA 657: What is the output impedance of the amplifier without any load connected at the output. I went through the datasheet and cannot find the value.

  • 0
    TI__Guru 64530 points

    Al,

     

    Closed-loop output impedance of OPA657 is in the data sheet (see below) and the open-loop output impedance may be simulated using the existing spice macro-model (see the attached file for procedure).  At lower frequency, Zout seems to be around 7.6ohms (assuming the macro-model itself is correct).

     

     

    OPA657 Zout Test.TSC