Measuring current
Some tips to reduce noise:
• Use probes with 1 × 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.
9.3 Using an ampere-meter for current measurement
The average current drawn by the nRF52833 SoC can be measured using an ampere-meter. This method
will monitor the current in series with the nRF device.
Make sure you have prepared the DK as described in section Preparing the development kit on page
38.
Connect an ampere-meter between the pins of connector P22 as shown in the figure below.
Figure 32: Current measurement with an ampere-meter
Note: An ampere-meter will measure the average current drawn by the nRF52833 SoC if:
• The SoC is in a state where it draws a constant current, or, the activity on the device changing
load current, like BLE connection events, is repeated continuously and has a short cycle time
(less than 100 ms) so that the ampere-meter will average whole load cycles and not parts of the
cycle.
• The dynamic range of the ampere-meter is wide enough to give accurate measurements from 1
µA to 15 mA.
It is recommended that you use a true RMS ampere-meter.
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