SWRA625B August   2018  – February 2020 CC1352P , CC1352R , CC2652P , CC2652R , CC2652R7 , CC2652RSIP

 

  1.   Z-Stack End Device Power Consumption Measurement With the SimpleLink Wireless MCU Family
    1.     Trademarks
    2. 1 Introduction
    3. 2 Abbreviations and Acronyms
    4. 3 System Overview
      1. 3.1 Hardware:LAUNCHXL-CC1352P-2, LAUNCHXL-CC26X2R1
      2. 3.2 Software: Z-Stack
        1. 3.2.1 Z-Stack Development Environment
    5. 4 Measurement Setup
      1. 4.1 Instrumentation
      2. 4.2 Software Setup
        1. 4.2.1 Programming
        2. 4.2.2 ZC Node
        3. 4.2.3 ZED Node
        4. 4.2.4 GPD Node
        5. 4.2.5 Commissioning
    6. 5 Measurements
      1. 5.1 Measurements for Regular ZED
      2. 5.2 Measurements for Green Power Device
      3. 5.3 Measurements Using the EnergyTrace Tool
    7. 6 Application to a Practical Use Case
      1. 6.1 Estimation for Usage Scenario
        1. 6.1.1 Usage Scenario 1
      2. 6.2 Usage Scenario 2
    8. 7 Batteryless Green Power Device
    9. 8 Summary
    10. 9 References
  2.   Revision History

5.2 Measurements for Green Power Device

In Operation1, the GPD in a standby state. This can be carried out below the 1 μA threshold with full 80KB RAM retention. The GPD device is meant as a battery-less device, only being powered on with enough energy to send out a Zigbee command from harvesting energy from for example flipping a switch. Otherwise, the GPD is in sleep mode, or powered off. Figure 12 shows the average current consumption when the GPD is in sleep mode, which was averaged at 1 μA.

swra625-gpd-current-consumption-in-sleep-mode.gifFigure 12. GPD Current Consumption Measurement in Sleep Mode

In Operation2, the GPD sends a set number of GPDFs, configured by the predefine symbol GPDF_FRAME_DUPLICATES, which is defined at compile time. The default is set to send 3 duplicate GPDFs, or 4 packets in total. Figure 13 shows the current consumption when the GPD sent 4 total GPDF packets at 5 dBm, which was averaged at 6.1 mA and took 16 ms. The current consumption when the GPD is sending 1 GPDF with no duplicates at 5 dBm, was averaged at 5.6 mA and took 4.5 ms.

swra625-gpd-current-consumption-toggle-operatiion-3-duplicate.gifFigure 13. GPD Current Consumption Measurement for Sending GPDF With 3 Duplicates (5 dBm)

Table 3. Current Consumption of SimpleLink CC1352P/CC2652R for GPD Typical Use Cases

Power Level GPDF - No Duplicates GPDF - 3 Duplicates
0 dBm 5.6 mA 6.0 mA
5 dBm 5.6 mA 6.1 mA
10 dBm 7.88 mA 8.61 mA
20 dBm 12.92 mA 16.42 mA