Texas Instruments CC3100 SimpleLink, User Manual

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Hardware Description
2.5 Measure the CC3100 Current Draw
2.5.1 Low Current Measurement (Hibernate and LPDS)
To measure the current draw of the CC3100 device, a jumper is provided on the board labeled J6. By
removing this jumper, you can place an ammeter into this path and the current can be observed. This
method is recommended for measuring LPDS and hibernate currents that are of the order of few 10s of
micro amps.
The jumper is removed and an ammeter is added in series to measure the hibernate and LPDS currents
(see
Figure 8 ).
Figure 8. Low Current Measurement
2.5.2 Active Current Measurement
To measure active current in a profile form, it is recommended to use a 0.1 Ω 1% resistor on the board
and measure the differential voltage across it. This can be done using a voltmeter or an oscilloscope for
measuring the current profile.
Figure 9. Active Current Measurement
13 SWRU371B – June 2014 – Revised January 2015 CC3100 SimpleLink™ Wi-Fi
®
and IoT Solution BoosterPack Hardware
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