SDAA465 August   2026 LMH13000 , LMH32401

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1Introduction
  5. 2Description
  6. 3Transmitter
    1. 3.1 Optical Power Versus Measuring Distance
    2. 3.2 The Inverse-Square Law and Distance
    3. 3.3 Optical Power Determines Maximum Range
  7. 4Receiver
    1. 4.1 Stability Consideration of TIA
    2. 4.2 Transimpedance Amplifier Selection: LMH32401
  8. 5Optical Housing Design
  9. 6Measurement Setup
  10. 7Lab Measurement
  11. 8Summary
  12. 9References

Abstract

Light detection and ranging (LiDAR) is a core ranging technology which uses laser light to measure distances. LiDAR can be used to create precise, three-dimensional (3D) maps and structural point clouds of objects and environments. LiDAR is mainly of two types: direct time of flight (dToF) and indirect time of flight (iToF). dTOF determines object distance by measuring the round‑trip travel time of nanosecond‑scale laser pulses and converting that timing into range, while iToF uses continuous modulated light to measure the phase shift (wave delay) between the emitted and returned signals. This design describes how LMH13000 and LMH32401 can be used to transmit and receive (respectively) nanosecond light pulse for measuring the distance using direct time of flight technique.