Because of the Thanksgiving holiday in the U.S., TI E2E™ design support forum responses may be delayed from November 25 through December 2. Thank you for your patience.

LDC0851: Sense distense and EMC issue

Part Number: LDC0851

Tool/software:

We mainly use LDC0851 as a position induction switch, a plastic hose with a small section of stainless steel metal sleeve on the pipe, need to identify whether the metal pipe is in position, the main problem on our side is excessive radiation and unstable working condition. Do the first version of the radiation beyond more, in order to improve this problem, on the antenna string 600R magnetic beads, radiation relative little improvement, made 50 pcb, a dozen pcb normal work, other state is not stable, work is not normal, the magnetic beads, or labeled 0R resistance, or work is not normal (when the induction state to metal light on, metal leave the light not go out, only with metal in the reference coil induction the light out). This abnormal work of pcb, we do not know whether the coil on pcb is not done well (the feeling is not enough or much), or we have a problem in circuit design, the attachment is our circuit prinV00.02.rarV00.01.rarciple diagram and PCB board layout, bother your FAE to help analyze, whether it meets the design requirements of LDC0851? Our target-sensing distance is 6mm.thanks very much!