--- Quote Start ---
This means to unsolder the TC11 capacitor and switch it with the serial connection of the same capacitor and one jumper. Connecting the resistor on the jumper and measuring the voltage on it I will be able to calculate the current my design will consume (see the attachment).
Please discuss with me and share your point of view. I would be very grateful to you.
http://uploadpic.org/v.php?img=yaM1o2JWk --- Quote End ---
The way you have drawn will not work.
The voltage drop across R53 is what you need to measure. You need to replace that resistor with something low-valued, so that you measure a voltage across it. How do you know the value?
1) Use the PowerPlay analyzer to get an estimate of your maximum design current, Imax.
2) Determine the maximum allowable drop in the core supply, eg., 1.2V core probably has a maximum drop of dV = 5mV or so (read the handbook to get the actual value).
3) The resistor value is something smaller than R = dV/Imax.
4) Measure the voltage difference using; two channels of an oscilloscope, a differential probe, or an instrumentation amplifier, or a current-sense amplifier.
Cheers,
Dave
Honored Contributor
