Low noise design of 32-channel snapshot X-ray readout IC

Abstract

The design and measurement of low noise 32-channel snapshot X-ray readout integrated circuit (ROIC) are proposed in this paper. This ROIC has 32 analog channels collecting weak current from detectors, then transfers them to voltage and outputs in differential mode. This ROIC adapts low noise preamplifier and S/H circuit. Measure results show a dynamic range larger than 11000:1 with 3.6pF integration capacitor. The dynamic range is higher than the previous design's and very close with a famous commercial IC.