“…We chose to make our designs with a resolution of 4 bits. This corresponds approximately to the best resolution that can be achieved with a room temperature GaAs detector [10], and we assume to a first approximation that the electronics noise will not deteriorate this resolution. We aim at a pixel size of the order of 100 mm by 100 mm, and a power consumption below 50 mW per pixel (including ADC, amplifier and readout).…”