Outline

• Errata affecting the current measurements
• DCDC does not automatically switch off in System ON IDLE
• NFCT can draw current when not enabled
• Measurements
• Results
• Test setup: Power analyzer
• Power Analyzer Measurements
• Test setup: Oscilloscope and ampere-meter
• Oscilloscope Measurements

Preparing the development kit The USB connector must not be used to power the board during measurements as it will give unreliable results due to added supply and measurement noise when the debugger chip USB port is active. The board should be powered from a coin cell battery, or using the External Supply pins P21 for current measurements.

Below you will find general information on measuring current with the nRF52 chip and basic test equipment setup and techniques.