Development of Low-Noise Front-End ASIC for Hybrid CdTe Pixel Detectors

Author

Sato, Goro ; Kishishita, Tetsuichi ; Ikeda, Hirokazu ; Sakumura, Takuto ; Takahashi, Tadayuki

Author_Institution

Inst. of Space & Astro nautical Sci., Japan Aerosp. Exploration Agency, Sagamihara, Japan

Volume

58

Issue

3

fYear

2011

fDate

6/1/2011 12:00:00 AM

Firstpage

1370

Lastpage

1375

Abstract

A front-end ASIC with spectroscopic capability was developed to construct a prototype CdTe pixel detector for future use in focusing hard X-ray telescopes. The ASIC is designed for a hybrid configuration, where each CdTe sensor pixel is vertically connected to a corresponding pixel cell fabricated in the readout ASIC. The readout chip consists of a 12 × 12 matrix of identical 270×270 μm² pixel cells, and was implemented with TSMC 0.35 μm CMOS technology. The low noise performance achieved an equivalent noise charge distribution of 50 ±10 e^- . A CdTe pixel detector was mounted on the ASIC using an In/Au-stud bump-bonding technique. The detector was operated in self-trigger mode, and showed good spectral performance with energy resolution of 870 eV (FWHM) at 59.5 keV.

Keywords

CMOS image sensors; application specific integrated circuits; nuclear electronics; readout electronics; semiconductor counters; CdTe sensor pixel; TSMC CMOS technology; X-ray telescopes; hybrid CdTe pixel detectors; hybrid configuration; low noise performance; low-noise front-end ASIC; noise charge distribution; pixel cell; prototype CdTe pixel detector; readout ASIC; readout chip; spectral performance; spectroscopic capability; Application specific integrated circuits; Detectors; Electrodes; FETs; Logic gates; Noise; Pixel; ASIC; Analog front-end; CdTe; CdZnTe; VLSI; X-ray; gamma-ray; low noise; pixel;

fLanguage

English

Journal_Title

Nuclear Science, IEEE Transactions on

Publisher

ieee

ISSN

0018-9499

Type

jour

DOI

10.1109/TNS.2011.2135865

Filename

5756681