• State
  • Locked Locked
  • Replies 1 reply
  • Subscribers 49 subscribers
  • Views 1058 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.

INA169 Output Gain

Blake Ma
Intellectual 955 points
Other Parts Discussed in Thread: INA169

Hi,

We met an issue when we use INA169 as output current amplifier, please see the following schematic. There is an abnormal phenomenon as attached waveform, when output is on or off, there is a large spike on pin1 of INA169. Could please share your comment on this issue?

Besides, currently, we used amplifier coefficient K=215:1, is it OK?

 

Thanks!  

  • 0
    TI__Genius 15760 points
    Hi Blake,

    That shunt resistor I see in the schematic is very small, you meant 2m ohms? What is your differential voltage? Can you please measure it? I need to understand what is happening on the inputs.

    With coefficient you are referent to the Gain Setting resistor? You can select the resistor of your preference to set the gain.