MiniCACTUS-V2: AHEP ASIC Prototype for 50ps Time Resolution

Depleted Monolithic Active Pixel Sensors (DMAPS) integrate both sensor and front-end electronics on a single substrate, avoiding the complicated sensor to chip interconnection process. Modern CMOS technology allows a good radiation tolerance which draws a lot of interests as an alternative solution for tracking detectors in High Energy Physics (HEP). Furthermore, recently DMAPS are being explored for timing measurements. The Mini-CACTUS (Cmos Active pixel Timing p sensor) is a prototype that was shown to achieve a 65 ps time resolution and 80 ns recovery time. In this paper, a new prototype using LFoundry 150 nm HV technology, mini-CACTUS-V2 is presented with improved jitter and recovery time from post simulation.