LDC1000EVM: How to measure a fixed inductance with the LDC1000EVM

Mickey Zhang

Genius 12080 points

Part Number: LDC1000EVM

Hi Team,

The customer is using LDC1000EVM. He watches the video that you can change the LDC1000EVM default sensor coil tp a coil of your choice.

In the video, the engineer uses a Impedance analyzer to measure the Rp_MAX,Rp_MIN and the resonant frequency of the coil. But now the customer

does not have the lmpedance analyzer.

Q1: Is there any other ways to measure the Rp_MAX,Rp_MIN and the resonant frequency of the coil?

Q2: Can the LDC1000EVM be used to measure a fixed inductance value? If it can, how to measure a fixed inductance value through the LDC1000EVM?

Best Wishes,
Mickey Zhang
Asia Customer Support Center
Texas Instruments

over 8 years ago

0 Mickey Zhang over 8 years ago

TI__Genius 12080 points

Hi Team,

Can anyone provide some support for me? The customer is waiting for my reply.

0 Chris Oberhauser66 over 8 years ago

TI__Genius 14270 points

Hi Mickey,

1) Refer to for methods to measure the RP without an Impedance analyzer. As for measuring the sensor frequency, you can use a scope from one of the inputs to ground. Do keep in mind that most scopes will add about 10pF of extra capacitance, so you may need to compensate for that.

2) Yes, you can indeed measure a fixed inductor with an LDC. Simply put a fixed capacitor in parallel, connect up the EVM. enter the capacitance into the GUI.

FInally, we have other LDC devices which are better suited that the LDC1000 for most sensing applications - take a look at the LDC selection guide at .

Regards,

ChrisO

Sensors

Sensors forum

LDC1000EVM: How to measure a fixed inductance with the LDC1000EVM