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LDC1614: TIDA-00314 non-conductive surface touch

Part Number: LDC1614
Other Parts Discussed in Thread: TIDA-00314, TIDA-01102, LDC2114,

Dear team, 

The customer checked our reference design of TIDA-00314. but the customer consider using non-conductive surface like glass and they want to know whether they can use LDC 1614 or not. Is this available to detect changes in the inductance with or without only fingers? 

- Thickness of glass : 12mm 

please let me know your opinion regarding this application and if there is a design touch system using non-conductive surface.   

 Thank you. 

  • Hello,

    The inductive sensing devices can only detect metal targets. If a conductive layer (such as copper or aluminum tape) can be applied under the glass, then this could work for inductive sensing. Please note that the glass will need to deflect under the applied pressure from the user's finger, otherwise the LDC will not be able to detect a change in sensor inductance.

    We do recommend using the LDC2114, which is specifically designed for touch button applications. Also, we have an updated touch-on-metal TI Design that uses the LDC1614 (TIDA-01102).

    I recommend that your customer reads LDC Target Design and looks at the FAQ linked below for more information.

    Best Regards,