• State TI Thinks Resolved
  • Locked Locked
  • Replies 1 reply
  • Answers 1 answer
  • Subscribers 14 subscribers
  • Views 1186 views
  • Users 0 members are here
Support feedback
Options
Options
Related

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.

Isolating an Analog Signal

Bruno D.
Prodigy 130 points
Other Parts Discussed in Thread: AMC1311, ISO224

Hello All, 

I'm looking to isolated an analogue signal that is afterwards going to be read by an ADC.

The signal can go from around  0 to 5V. Is there any IC ( optocoupler, op-amp or other ) that could achieve this ?

I didn't want to use an Isolated ADC because I don't have any communication available to be used on the board.

Thank you.

  • 0
    TI__Guru 55342 points

    Hi Bruno,

    Our AMC1311 is going to be a good place to start. This device has high input impedance ideal for voltage measurements and a 0-2V input range. The 0-5V signal can simply be attenuated using a resistor divider. The AMC1211 is the cost optimized version of this device and there are automotive qualified versions of both. 

    Another option is the ISO224 with a  +/-12V input range, however this solution is not ideal since a large portion of the input range would not be utilized. 

    Please let me know if you have additional questions.