Development of a Hybrid CdTe pixel detector with a low-noise front-end ASIC

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

doi:10.1109/NSSMIC.2009.5402073

Development of a Hybrid CdTe pixel detector with a low-noise front-end ASIC

Goro Sato^*, Tetsuichi Kishishita, Hirokazu Ikeda, Takuto Sakumura, Tadayuki Takahashi

^*Corresponding author for this work

Waseda Research Institute for Science and Engineering

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

1 Citation (Scopus)

Abstract

We have developed a prototype cadmium telluride (CdTe) pixel detector for future use in focusing hard X-ray telescopes. We adopted a hybrid configuration where each CdTe sensor pixel is vertically connected to a corresponding pixel cell fabricated in a readout ASIC. This configuration is suitable for detectors with high pixel density to reduce a stray capacitance between readout signal lines. The readout chip consists of a 12 x 12 matrix of identical 270 μm x 270 μm pixel cells, and was implemented with TSMC 0.35-μm CMOS technology. Each pixel cell contains a charge-sensitive amplifier, pole-zero cancellation circuit, low-pass filter, comparator, and peak/bottom-hold circuit. We succeeded to obtain detector signals from all the 144 channels, showing a equivalent noise charge distribution of 66±4 e^- (rms). The linearity is maintained within ±1 % up to 3.5 fC, which corresponds to - 100 keV for CdTe. The detector exhibits good spectral performance with 870 eV (FWHM) at 59.5 keV. The power consumption is 150 μW per pixel, and 48 mW in total.

Original language	English
Title of host publication	IEEE Nuclear Science Symposium Conference Record
Pages	2207-2210
Number of pages	4
DOIs	https://doi.org/10.1109/NSSMIC.2009.5402073
Publication status	Published - 2009
Event	2009 IEEE Nuclear Science Symposium Conference Record, NSS/MIC 2009 - Orlando, FL Duration: 2009 Oct 25 → 2009 Oct 31

Other

Other	2009 IEEE Nuclear Science Symposium Conference Record, NSS/MIC 2009
City	Orlando, FL
Period	09/10/25 → 09/10/31

Keywords

Analog front-end
ASIC
CdTe
Gamma-ray
Low noise
Pixel
VLSI
X-ray

ASJC Scopus subject areas

Radiation
Nuclear and High Energy Physics
Radiology Nuclear Medicine and imaging

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10.1109/NSSMIC.2009.5402073

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title = "Development of a Hybrid CdTe pixel detector with a low-noise front-end ASIC",

abstract = "We have developed a prototype cadmium telluride (CdTe) pixel detector for future use in focusing hard X-ray telescopes. We adopted a hybrid configuration where each CdTe sensor pixel is vertically connected to a corresponding pixel cell fabricated in a readout ASIC. This configuration is suitable for detectors with high pixel density to reduce a stray capacitance between readout signal lines. The readout chip consists of a 12 x 12 matrix of identical 270 μm x 270 μm pixel cells, and was implemented with TSMC 0.35-μm CMOS technology. Each pixel cell contains a charge-sensitive amplifier, pole-zero cancellation circuit, low-pass filter, comparator, and peak/bottom-hold circuit. We succeeded to obtain detector signals from all the 144 channels, showing a equivalent noise charge distribution of 66±4 e- (rms). The linearity is maintained within ±1 % up to 3.5 fC, which corresponds to - 100 keV for CdTe. The detector exhibits good spectral performance with 870 eV (FWHM) at 59.5 keV. The power consumption is 150 μW per pixel, and 48 mW in total.",

keywords = "Analog front-end, ASIC, CdTe, Gamma-ray, Low noise, Pixel, VLSI, X-ray",

author = "Goro Sato and Tetsuichi Kishishita and Hirokazu Ikeda and Takuto Sakumura and Tadayuki Takahashi",

year = "2009",

doi = "10.1109/NSSMIC.2009.5402073",

language = "English",

isbn = "9781424439621",

pages = "2207--2210",

booktitle = "IEEE Nuclear Science Symposium Conference Record",

note = "2009 IEEE Nuclear Science Symposium Conference Record, NSS/MIC 2009 ; Conference date: 25-10-2009 Through 31-10-2009",

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AU - Sato, Goro

AU - Kishishita, Tetsuichi

AU - Ikeda, Hirokazu

AU - Sakumura, Takuto

AU - Takahashi, Tadayuki

PY - 2009

Y1 - 2009

N2 - We have developed a prototype cadmium telluride (CdTe) pixel detector for future use in focusing hard X-ray telescopes. We adopted a hybrid configuration where each CdTe sensor pixel is vertically connected to a corresponding pixel cell fabricated in a readout ASIC. This configuration is suitable for detectors with high pixel density to reduce a stray capacitance between readout signal lines. The readout chip consists of a 12 x 12 matrix of identical 270 μm x 270 μm pixel cells, and was implemented with TSMC 0.35-μm CMOS technology. Each pixel cell contains a charge-sensitive amplifier, pole-zero cancellation circuit, low-pass filter, comparator, and peak/bottom-hold circuit. We succeeded to obtain detector signals from all the 144 channels, showing a equivalent noise charge distribution of 66±4 e- (rms). The linearity is maintained within ±1 % up to 3.5 fC, which corresponds to - 100 keV for CdTe. The detector exhibits good spectral performance with 870 eV (FWHM) at 59.5 keV. The power consumption is 150 μW per pixel, and 48 mW in total.

AB - We have developed a prototype cadmium telluride (CdTe) pixel detector for future use in focusing hard X-ray telescopes. We adopted a hybrid configuration where each CdTe sensor pixel is vertically connected to a corresponding pixel cell fabricated in a readout ASIC. This configuration is suitable for detectors with high pixel density to reduce a stray capacitance between readout signal lines. The readout chip consists of a 12 x 12 matrix of identical 270 μm x 270 μm pixel cells, and was implemented with TSMC 0.35-μm CMOS technology. Each pixel cell contains a charge-sensitive amplifier, pole-zero cancellation circuit, low-pass filter, comparator, and peak/bottom-hold circuit. We succeeded to obtain detector signals from all the 144 channels, showing a equivalent noise charge distribution of 66±4 e- (rms). The linearity is maintained within ±1 % up to 3.5 fC, which corresponds to - 100 keV for CdTe. The detector exhibits good spectral performance with 870 eV (FWHM) at 59.5 keV. The power consumption is 150 μW per pixel, and 48 mW in total.

KW - Analog front-end

KW - ASIC

KW - CdTe

KW - Gamma-ray

KW - Low noise

KW - Pixel

KW - VLSI

KW - X-ray

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BT - IEEE Nuclear Science Symposium Conference Record

T2 - 2009 IEEE Nuclear Science Symposium Conference Record, NSS/MIC 2009

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ER -

Development of a Hybrid CdTe pixel detector with a low-noise front-end ASIC

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Keywords

ASJC Scopus subject areas

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