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LDC0851: Threshold Adjust Mode

PY (Pengyu) Song
Expert 5860 points
Part Number: LDC0851

Hi team,

When using ADJ pin to adjust switching threshold - 

  1. I suppose the reference resonant frequency would change, correct? 
  2. How about the amplitude of the resonant signal? Will it change too with different resistors at ADJ pin? 
  • 0
    TI__Mastermind 33170 points

    Pengyu,

    The ADJ pin does not change the resonant frequency of the coil, and it will not change the amplitude of the resonant signal.

    The ADJ pin adds an offset to the inductance converter output signal for the reference coil as shown in Figure 20 in the data sheet. 
    The only part of the signal chain it affects is the part labelled "Adjusted Ln". It does not affect the Ref coil.


    Regards,
    John