Power & current measurment

[Saati]

Hi everyone.

I want to measure the power and peak of the current microcontroller.

I series a 0.1ohm resistor with power supply (VDD) and then saw the drop voltage of the resistor by an oscilloscope with 200MHz bandwidth. but the spike of current is not good and I can't measure the peak of current in each rising edge of the clock.

Can anybody help me and introduce the methodology of companies for characterizing the power per clock and current peak in the rising edge of the clock?

Thanks & Regards
Saati

 

[KlausST]

Hi,

Spike on the resistor ... should not be, since it is mandatory to put fast capacitors at the VCC pin(s) of the microcontroller. (no resitor between capacitor and IC)

Thus I expect frequencies in the kHz region max. .. with low voltage ripple.

Klaus