SNLA241A October   2015  – July 2025 DP83867CR , DP83867CS , DP83867E , DP83867IR , DP83867IS

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1Introduction
  5. 2Factors Affecting Power Consumption
    1. 2.1 Operational Mode
    2. 2.2 I/O Pin Loading
    3. 2.3 Channel Utilization
    4. 2.4 Payload
    5. 2.5 Temperature
  6. 3Power Saving Modes
    1. 3.1 IEEE Power Down
    2. 3.2 Deep Power Down Mode
    3. 3.3 Active Sleep
    4. 3.4 Passive Sleep
  7. 4Power Consumption Baseline Data
    1. 4.1 Base Line Power Consumption
  8. 5Summary
  9. 6Appendix
    1. 6.1 1000M Power
    2. 6.2 100M Power
    3. 6.3 10M power
    4. 6.4 Channel Utilization 1000M
    5. 6.5 Power Down Consumption
  10. 7Revision History

4 Power Consumption Baseline Data

The power consumption of the PHY can vary with all of the factors listed above. For the scope of this Application report, the PHY’s power consumption with respect to Operating Mode, Supply type, VDDIO voltage and temperature is listed below. Also, the power numbers are measured after the optimization techniques listed above. The parameters for the tests are 1518 byte Packet size, 50% utilization, 100m cable length and random data pattern. The packet size, cable length and data pattern are selected to mimic the worst case conditions. The utilization is selected to be a worst case for most of the real world applications. As mentioned above, increasing the utilization will result in increase in power consumption.

The power numbers listed below were measured on a limited number of samples in a lab environment. Data is presented in a column format with current consumed by individual supplies listed with the total power number.