LDC1000: Current calculation

Andre Lukassen

Part Number: LDC1000

Hello Guys,

I set the oscillation amplitude on 4V and I have for Rpmin=5387, Rpmax=83111. Can be the current approximately calculate with I_dirve=4V/ (Rpmin+Rpmax)?

Is the current approximately 45µA?

best regards

André

over 7 years ago

0 Jiashow Ho over 7 years ago

TI__Genius 11340 points

Hi Andre,

Why are you trying to calculate Idrive?

There are actually two Idrives, the upper limit is set by Rpmin and the lower limit is set by Rpmax. You do not combine Rpmin and Rpmax for the calculation.

Refer to Q22 from the Inductive Sensing FAQ and Q3 from Top Three LDC1000 Questions for more info on this.

Best,

Jiashow

0 Andre Lukassen over 7 years ago in reply to Jiashow Ho

Prodigy 220 points

Hi Jiashow,

I want to realize a proximity sensor with the LDC 1000. With the Rpmin and Rpmax registers we can set the current and when I varie the Rpmin, Rpmax registers the behavior of the inductance is changed. This means the inductance increaseor decrease near by a proximity of 0mm . So I try to figure out the current to make a simulation that the behavoir of theinductance explains.

regards

Andre

0 Jiashow Ho over 7 years ago in reply to Andre Lukassen

TI__Genius 11340 points

Hi Andre,

Could provide more clarification? what do mean by "behavior of the inductance is changed"?

Thanks,
Jiashow

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LDC1000: Current calculation