Design of an integrated multi-line LiDAR analog front-end micromodule

Multi-line LiDAR has a wide range of application demands, but the current detection and processing circuit of LiDAR is mostly composed of discrete components, and the detector is separated from the processing circuit, which brings high cost, poor reliability, and other problems. To solve the above problems, an integrated 16-element LiDAR analog front-end micromodule based on system-in-package technology is proposed, which has important practical significance for the research of multi-component LiDAR micromodule. This module integrates a 16-element avalanche photon diode array detector, a self-developed multi-channel LiDAR analog front-end readout circuit chip, a temperature sensor, and a thermoelectric cooler, etc., which can realize the integration of detection, processing and temperature control. The test results show that the thermostatic stability of the micromodule is 0.07 ℃, the bandwidth of the micromodule is up to 190 MHz, the noise level of the integrated micromodule is reduced by more than 32% compared with that of the non-integrated micromodule, and high speed detection of 5 ns laser narrow pulse is realized.