A 480×320 CMOS LiDAR Sensor with Tapering 1-Step Histogramming TDCs and Sub-Pixel Echo Resolvers

Digest of technical papers/Digest of technical papers - IEEE International Solid-State Circuits Conference 2026

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Authors: Wonjong Roh, Canxing Piao, Taehoon Jeon, Junsang Bae, Jung‐Hoon Chun, Seong-Jin Kim, Jaehyuk Choi
DOI: 10.1109/isscc49663.2026.11409240
Cited by: 0
References: 5

Abstract

A$480 \times 320$CMOS LiDAR sensor using tapered 1 -step hTDCs and SPER for memory-efficient operation is presented. The hTDC accumulates histograms with 1ns resolution over the full range and applies 500ps resolution only at the echoes, while SPER maps echoes to individual SPADs, enabling$4 \times$image resolution. Implemented with$2 \times 2$SPAD macro-pixels and shared AFEs ($2.5 ~\mathrm{T} / \text{SPAD}$) in a 90 nm BSI CIS process, the sensor achieves 3.8 cm precision at 100 m and 4.1 cm accuracy under 110 klx sunlight at 25fps.

Fields of Study & Subjects

Advanced Optical Sensing Technologies CCD and CMOS Imaging Sensors Analog and Mixed-Signal Circuit Design

Publication details

Journal / source
Digest of technical papers/Digest of technical papers - IEEE International Solid-State Circuits Conference
Pages
118–120
Publication date
15 February 2026
Language
EN