Characterization of a new HV/HR CMOS Sensor in LF150nm Process for the ATLAS Inner Tracker Upgrade

A HV/HR CMOS detector prototype called LF-CPIX, has been designed in LFoundry 150nm technology. The front-end electronics has been implemented using both NMOS and PMOS transistors, inside the charge collection diode, with a pitch of 250 μm × 50 μm. This demonstrator is an implementation of a matrix of smart pixels where the diode is composed by a Deep Nwell, and P-type substrate is used as a depleted sensor. Three types of pixels have been developed: passive pixels, analog-digital pixels, analog pixels. The analog pixels can be connected to the FE-I4 IC, which is the present readout IC of the innermost ATLAS pixel layers. The different versions of the LF-CPIX demonstrators are described, characterization of the different pre-amplifiers flavors with external injection signal and
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Fe source are presented for the digital pixels. Finally radiation hardness results are discussed.