Development of a low-noise analog front-end ASIC for CdTe detectors

被引：16
|
作者：
Kishishita, Tetsuichi [1 ]
Ikeda, Hirokazu
Kiyuna, Tatsuya
Tamura, Ken-ichi
Nakazawa, Kazuhiro
Takahashi, Tadayuki
机构：
[1] Japan Aerosp Explorat Agcy, Inst Space & Astronaut Sci, Kanagawa 2298510, Japan
[2] Univ Tokyo, Dept Phys, Tokyo 1130033, Japan
[3] Acrorad Co Ltd, Okinawa 9042234, Japan
来源：
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT | 2007年 / 580卷 / 03期
关键词：
ASIC; open-IP; low noise; X-ray; gamma ray; CdTe; analog front-end;
D O I：
10.1016/j.nima.2007.07.003
中图分类号：
TH7 [仪器、仪表];
学科分类号：
0804 ; 080401 ; 081102 ;
摘要：
This paper describes the recent development of a low-noise analog front-end ASIC for CdTe detectors. The ASIC is designed on the basis of the Open-IP LSI project led by JAXA and implemented using TSMC 0.35-mu m CMOS technology. The ASIC contains eight identical channels, each of which includes a charge-sensitive amplifier, band-pass filters, and a sample-and-hold circuit. Preliminary testing of the ASIC achieved noise performance of 188e(-) + 7.5e(-)/pF. In order to verify the low-noise characteristics, the ASIC was connected to a guard-ring-equipped CdTe diode detector with dimensions of 2.4 x 2.4 mm and having a thickness of 0.5 mm. As a result, the gamma-ray spectra of radioactive sources were obtained with good energy resolutions of 2.51 and 2.35 keV (FWHM) for gamma rays of 59.5 and 122 keV, respectively, at room temperature. (C) 2007 Elsevier B.V. All rights reserved.
引用
收藏
页码：1363 / 1371
页数：9
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