We report on the characterization of four Teledyne Imaging Systems HAWAIIHybrid Si CMOS detectors designed for X-ray detection. Three H1RG detectorswere studied along with a specially configured H2RG. Read noise measurementswere performed, with the lowest result being 7.1 e- RMS. Interpixel capacitivecrosstalk (IPC) was measured for the three H1RGs and for the H2RG. The H1RGshad IPC upper limits of 4.0 - 5.5 % (up & down pixels) and 8.7 - 9.7 % (left &right pixels), indicating a clear asymmetry. Energy resolution is reported fortwo X-ray lines, 1.5 & 5.9 keV, at multiple temperatures between 150 - 210 K.The best resolution measured at 5.9 keV was 250 eV (4.2 %) at 150 K, with IPCcontributing significantly to this measured energy distribution. The H2RG, witha unique configuration designed to decrease the capacitive coupling betweenROIC pixels, had an IPC of 1.8 +/- 1.0 % indicating a dramatic improvement inIPC with no measurable asymmetry. We also measured dark current as a functionof temperature for each detector. For the detector with the lowest darkcurrent, at 150 K, we measured a dark current of 0.020 +/- 0.001 (e- sec-1pix-1). There is also a consistent break in the fit to the dark current datafor each detector. Above 180 K, all the data can be fit by the product of apower law in temperature and an exponential. Below 180 K the dark currentdecreases more slowly; a shallow power law or constant must be added to eachfit, indicating a different form of dark current is dominant in thistemperature regime. Dark current figures of merit at 293 K are estimated fromthe fit for each detector.
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