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Guru 28945 points
Other Parts Discussed in Thread: LDC0851EVM

Hi Team,

I would like to ask two questions.

LDC0851EVM User's Guide shows the following.
(User's Guide page 5)
The EVM sensor is a 4 layer stacked coil design, with the top 2 layers used for the sensing coil, and the
bottom 2 layers used for the reference coil.
Could you tell me the spacing between the sensing coil and reference coil (height= h) for the EVM?

It seems Equation 1 of User's Guide (page 9) is different from Equation 1 of datasheet (page 15).
The coefficient in User's Guide is 0.3 but that in datasheet is 0.4.
Is it correct?
(User's Guide page 9)


Best Regards,
Yaita / Japan disty

  • Hello Yaita-san,
    1) the stack-up is:
    top layer (sense)
    10 mil (0.25mm) FR4
    midlayer 1 (sense)
    36 mil (0.91mm) FR4
    midlayer 2 (reference)
    10 mil (0.25mm) FR4
    bottom layer (reference)

    0.4 applies to side-by-side coils for ADJ1
    0.3 applies to stacked coils with ADJ1