Aspects of the present disclosure relate to a photon counting detector and to a read-out integrated circuit to be used in such detector. Aspects of the present disclosure particularly relate to X-ray applications.
According to an aspect of the present disclosure, the detector comprises an electrical ground plane arranged at or near an interface between the carrier and at least one ROIC die. Each ROIC die comprises an extension region that laterally extends beyond the photon conversion assembly, wherein peripheral circuitry for a given ROIC die is arranged in the extension region of that ROIC die. The detector comprises at least one electrical connection that connects the power supply line that is arranged on the carrier to the peripheral circuitry of the at least one ROIC die.