A 32 × 32-channels chip for x-ray pixel detector read-out

Abstract

In this paper we present a spectrometer realized by bump-bonding a 300-μm-pitch, 32 × 32-pixel silicon X-ray detector chip to a 0.35-μm CMOS, 3-cm2 read-out chip. The selftriggered, mixed analog-digital read-out chip, with 1,024 channels, digitizes the X-ray photon energy with 10 bits of resolution, provides the coordinates of the triggered pixels and achieves 34 e-rms of input referred noise, ±3.3 LSB of INL and ±0.2 LSB of DNL, while consuming 555 mW from a 3.3-V supply. Preliminary experimental results on the complete spectrometer are reported. © 2010 Springer Science+Business Media B.V.