您好，关于LDC的应用，可以参考关于LDC xx系列芯片的FAQ的Q19&20：：e2e.ti.com/.../295036
Q19: What is the influence of a motor magnetic field on LDC?
Answer: Motor magnetic fields will have no impact on LDC, if the oscillation frequency of the LDC is set to MHz range. The motor magnetic field frequency is drastically smaller, and thus cannot couple into the LC tank.
Q20: I am holding a permanent magnet close to coil and can see a decrease in inductance. Is the sensor affected by the magnetic fields of the magnet?
Answer: No. The permanent magnetic field does not interfere with the measurement. However, the conductive material which the magnet is made of acts as a target itself.
Thank you for your reply. Could you give me more detailed information? What are the frequency and the strength of the motor magnetic field you mentioned? In high power wireless charging field, the coils will be surrounded by strong time-varying magnetic field at a frequency of 85KHz and a amplitude ranging from 1mT to 3mT? In my test, the 85KHz induced voltage of a square coil with a length of 5cm can reach approximately 1V. Will is reduced the accuracy and sensitivity of LDC seriously?
