Large monolithic particle pixel-detector in high-voltage CMOS technology
A large monolithic particle pixel-detector implemented as system on a chip in a high-voltage 0.35 μ m CMOS technology will be presented. The detector uses high-voltage n-well/p-substrate diodes as pixel-sensors. The diodes can be reversely biased with more than 60 V. In this way, depleted zones of a...
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Veröffentlicht in: | Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment Accelerators, spectrometers, detectors and associated equipment, 2010-12, Vol.624 (2), p.504-508 |
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Format: | Artikel |
Sprache: | eng |
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Zusammenfassung: | A large monolithic particle pixel-detector implemented as system on a chip in a high-voltage
0.35
μ
m
CMOS technology will be presented. The detector uses high-voltage n-well/p-substrate diodes as pixel-sensors. The diodes can be reversely biased with more than 60
V. In this way, depleted zones of about
10
μ
m
thickness are formed, where the signal charges can be collected by drift. Due to fast charge collection in the strong electric-field zones, a higher radiation tolerance of the sensor is expected than in the case of the standard MAPS detectors. Simple pixel-readout electronics are implemented inside the n-wells. The readout is based on a source follower with one select- and two reset-transistors. Due to embedding of the pixel-readout electronics inside the collecting electrodes (n-wells) there are no insensitive zones within the pixel matrix. The detector chip contains a 128×128 matrix consisting of pixels of
21
×
21
μ
m
2
-size. The diode voltages of one selected pixel-row are received at the bottom of the matrix by 128 eight-bit single-slope ADCs. All ADCs operate in parallel. The ADC codes are read out using eight LVDS 500
MBit/s output links. The readout electronics are designed to allow the readout of the whole pixel matrix in less than
50
μ
s
. The total DC power consumption of the chip is 50
mW. All analog parts of the chip are implemented using radiation-hard layout techniques. Experimental results will be presented. |
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ISSN: | 0168-9002 1872-9576 |
DOI: | 10.1016/j.nima.2010.03.161 |