• State TI Thinks Resolved
  • Locked Locked
  • Replies 1 reply
  • Answers 1 answer
  • Subscribers 30 subscribers
  • Views 376 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.

CCS/LDC1614EVM: LDC1614EVM

Sherif Ismail
Prodigy 165 points
Part Number: LDC1614EVM
Other Parts Discussed in Thread: LDC1614

Tool/software: Code Composer Studio

Hello TI,

I have got some enquiries about connecting an external Power supply to an external coil connected to the LDC and then gradually add some voltage to the coil.

So what would be the behavior of the sensor.

The Following figure illustrate my enquiry.

Thanks in advance.

Regards 

Sherif Ismail 

  • 0
    TI__Genius 17440 points

    Hello Sherif,

    As you've drawn it here, this could seriously impact the reliability of the inductive sensing system. The LDC1614 may not be able to make inductive measurements with this configuration. The LDC1614 looks for zero crossings of the sensor oscillations, and injecting another signal (AC or DC) could disrupt this process. In addition, if you increase the voltage too much you could violate the absolute maximum voltage ratings for the INxA/B pins and damage the device.

    If you need to add a power supply to your coil you would need to decouple the power supply's signal from the LDC1614 using series capacitors. Note that if you are using the power supply to heat your coil you may encounter error due to the temperature change. I do NOT recommend using a power supply if your goal is to supplement the drive capability of the LDC1614.

    Best Regards,