• State TI Thinks Resolved
  • Locked Locked
  • Replies 1 reply
  • Answers 1 answer
  • Subscribers 31 subscribers
  • Views 250 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.

Original question:

[FAQ] Inductive sensing FAQ - Frequently asked questions

LDC1612EVM: LDC1612EVM

Dinesh Kumar2
Prodigy 120 points
Part Number: LDC1612EVM
Other Parts Discussed in Thread: LDC1612

I am using LDC1612 IC in one of my modules for object detection purpose. Before Assembling the coil sensors in the modules, am validating them using LDC1612 EVM to detect the drive current as I don't know Rp of it.

My question is does the EVM has the hardware logic to change the detected drive current and Vosc given to the coil sensors?.

Because am using the LDC1612 IC with an LPC1115 IC, I doubt whether to add any software logic in my controller or to modify my hardware to change Idrive in my PCBA module?

The coil am using is of 24 turns, 2layered, 1Oz Cu thickness, 0.102mm track width and spacing. Capacitor used is 330pF in the tank circuit.

A clarification would be really helpful.

Thanks

Dinesh.

  • 0
    TI__Genius 17440 points

    Hi Dinesh,

    The LDC1612 IDRIVEx register settings can be changed manually with I2C write commands; there's no hardware changes needed (unless your coil Rp is outside of the LDC1612's specified Rp range). There is a convenient mode called "Automatic Amplitude Correction" that will set the IDRIVE setting for you if you don't know your sensor Rp. Please note that this mode is just for prototyping and should not be used in production. You should manually set the IDRIVE setting in your firmware in production. 

    You may find this application note helpful: http://www.ti.com/lit/an/snoa950/snoa950.pdf

    Best Regards,