Current measurement
• Use probes with 1x attenuation.
• Enable averaging mode to reduce random noise.
• Enable high-resolution function if available.
Use a minimum of 200 kSa/s (one sample every 5 µs) to get the correct average current measurement.
5.3 Measure average current with an ampere meter
The average current drawn by the application nRF5340 SoC can be measured using an ampere meter. This
method monitors the current in series with the nRF device. A true ampere meter is recommended.
Make sure you have prepared the DK as described in Set up the DK on page 36.
Connect an ampere meter between the pins of connector P22 as shown in the following figure.
To measure the average current drawn by the nRF5340 SoC, perform the following steps.:
• Set the average timing of the ampere meter to a long interval, such as 1 s or longer.
• Set the dynamic range of the ampere meter between 1 uA and 15 mA, so that it is wide enough to
provide accurate measurements.
Figure 37: Current measurement with an ampere meter
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