AN92584 Datasheet, PDF (19/42 Pages) Ramtron International Corporation – Designing for Low Power and Estimating Battery Life for BLE Applications

Designing for Low Power and Estimating Battery Life for BLE Applications
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Figure 8. Average Current Versus Connection Interval
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Connection interval (ms)
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3.3.2
Current Profile for Advertising and Connection States
To observe the current profile described previously for the advertising and connection events, follow this procedure.
1. Connect a current probe such as Tektronix TCP0030 across the jumper wire on the J15 connector.
2. Connect the probe to a high-performance oscilloscope such as Tektronix DPO 4054.
3. Set the range of resolution for the current axis between 2 mA and 5 mA and the range of resolution for the time
axis between 500 µs and 800 µs.
4. Trigger the oscilloscope to capture the waveform.
Figure 9 and Figure 10 show the current profile oscilloscope captures for the advertising interval and connection
interval of 100 ms each, respectively. The letters marked in the capture map to the different power stages the device
goes through during the advertising and connection states, as described in Appendix A: Advertising State Current
Profile and Appendix B: Connection State Current Profile.
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Document No. 001-92584 Rev. *A
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