LDC3114-Q1: Some application questions about the device

Zirui Su

Part Number: LDC3114-Q1

Hi team

Customer would like to evaluate the device and they did not use it so have some questions to ask:

1. Must the metal sheet have to be deformed to be sensed? Is it possible to just move up and down to identify the displacement signal without letting the metal deform?
2. Whether the displacement recognition can reach the accuracy of 0.1mm
3. Does the metal piece need/must to be grounded?

4. Is there a mature application of the project, especially the automotive project?

5. What else smaller value could be used for the diameter since we think the 14mm recommendation is a little bit large;

Thank you in advance for your reply!

over 3 years ago

0 Justin Beigel over 3 years ago

TI__Mastermind 18545 points

Hello,

Here are some answers for your questions

The metal target does not have to be deformed. Movement to and from the target can also be sensed.
An accuracy of 0.1mm is possible depending on the sensor and target design.
The metal does not need to be grounded.
We have lots of collateral for this type of application to support this type of design
You can definitely go smaller than 14mm. If you get down to very small coils (a few mm), it is recommended to use a race track (oval) design to increase the inductance while still having the smaller size.

Here are some links to collateral that I think will be helpful:

https://training.ti.com/ti-precision-labs-inductive-sensing - training videos on inductive sensing. Covers some basics of the technology
LDC Target Design (Rev. B)
Sensor Design for Inductive Sensing Applications Using LDC (Rev. C)
Inductive Sensing for LDC3114 Metal Proximity Detection

Best Regards,

Justin Beigel

Sensors

Sensors forum

LDC3114-Q1: Some application questions about the device