Precision timing ASIC for LGAD sensors based on a Constant Fraction Discriminator – FCFD0

<!--HTML-->Silicon detectors with excellent time resolution will play a critical role in future collider experiments, providing a new tool in event reconstruction. The Low Gain Avalanche Detectors (LGAD) have been demonstrated to provide the required time resolution and radiation tolerance. We will present the FCFD0 ASIC developed to read out LGAD signals. The FCFD0 utilizes Constant Fraction Discriminator (CFD) algorithm to time-stamp the time-of-arrival, which has several advantages compared to Leading Edge discriminator, and promises to be more reliable in operation. Results from the first prototype chip produced in TSMC 65 nm node, will be presented.