SWRA689 February   2022 AWR6843 , AWR6843AOP , IWR6843 , IWR6843AOP

 

  1.   Trademarks
  2. 1Introduction
  3. 2Radar System Overview
    1. 2.1 Architecture Overview
    2. 2.2 Equipment for Evaluation
      1. 2.2.1 Hardware
      2. 2.2.2 Software
    3. 2.3 Radar Measurement Cycle
  4. 3Active Mode Optimizations
    1. 3.1 Acquisition Period Overview
    2. 3.2 Acquisition Period Optimization Parameters
    3. 3.3 Acquisition Period Optimization Tradeoffs
    4. 3.4 Acquisition Period Optimization Implementation
      1. 3.4.1 Single Chirp Duration
      2. 3.4.2 Number of Chirps
      3. 3.4.3 Number of Tx Antennas
  5. 4Idle Mode Optimizations
    1. 4.1 Inter-Frame Period Overview
    2. 4.2 Idle Mode Techniques
      1. 4.2.1 Power Domain Components
        1. 4.2.1.1 DSP Power Domain Shutdown
      2. 4.2.2 Digital Domain Components
        1. 4.2.2.1 DSS Clock Gating (DSP Subsystem)
        2. 4.2.2.2 MSS VCLK to 40 MHz (Master Subsystem)
        3. 4.2.2.3 BSS Clock Gating (Radar Subsystem - BIST)
      3. 4.2.3 Analog Domain Components
        1. 4.2.3.1 RF Power Down (Radar Subsystem - Analog Front End)
        2. 4.2.3.2 APLL Power Down (Radar Subsystem - APLL)
      4. 4.2.4 Component Summary
    3. 4.3 Idle Mode Implementation
      1. 4.3.1 Idle Power CLI Configuration in 68xx Low-Power Demo
      2. 4.3.2 Example Invoking Idle Mode
        1. 4.3.2.1 Nominal Power Down Scheme
        2. 4.3.2.2 Full Power Down Scheme
        3. 4.3.2.3 Fast Power Down Scheme (Clock Gates Only)
  6. 5Power Measurement Methods and Results
    1. 5.1 Power Measurement Method
    2. 5.2 Idle Mode Power Measurements
      1. 5.2.1 Nominal Power Down Scheme Measurements
      2. 5.2.2 Full Power Down Scheme Measurements
      3. 5.2.3 Fast Power Down Scheme Measurements
  7. 6References

1 Introduction

TI mmWave Sensors enable high performance measurement and object detection over a variety of applications but some designs require minimal power consumption. This Application Note will showcase various power-saving techniques on the mmWave sensor where power consumption concerns are critical. Using this guide will enable one to implement various optimizations for evaluation. Moreover this guide discusses the tradeoffs involved as well.

The power saving techniques discussed in this guide can be implemented exclusively through software. Using the AWR6843 Evaluation Module (EVM), mmWave-SDK, and Code Composer Studio IDE one can replicate the results shown here with the use of standard laboratory equipment for power measurement.