NDLI: A custom 12-bit cyclic ADC for the electromagnetic calorimeter of the International Linear Collider

Content Provider	IEEE Xplore Digital Library
Author	Manen, S. Royer, L. Gay, P.
Copyright Year	2008
Description	Author affiliation: LPC Clermont-Ferrand, 24 Avenue des Landais, 63177 Aubière FRANCE (Manen, S.; Royer, L.; Gay, P.)
Abstract	A custom 12-bit Analog-to-Digital Converter (ADC) has been designed. It is dedicated to the very-front-end electronics of the electromagnetic calorimeter (Ecal) of the International Linear Collider (ILC). A cyclic architecture, with a resolution of 2 bits per cycle has been chosen. Its compactness allows the use of one ADC per channel which simplifies the layout of the final 64-channel very-front-end chip and preserve the signal integrity. In order to optimize the ratio between the sampling rate and the power consumption, an enhanced design is proposed. It involves the use of a single amplifier shared between two parallel capacitor arrays. The power consumption is then limited to 4mW, and with the use of a power pulsing with the duty ratio of ILC, an integrated power consumption of 0.12 µW is expected. The time conversion of 7 µs obtained with a clock frequency of 1MHz is shorter compare to the 500 µs foreseen for A/D conversion. The building blocks which are the operational amplifier and the comparator have been previously validated in a 10-bit pipeline ADC, but they have been optimized to fulfil the 12-bit resolution and speed performance required. A prototype chip has been layouted using the 0.35 μm CMOS technology of Austriamicrosystems. Measurements show that the Differential Non-Linearity and Integral Non-Linearity are respectively within a ±1.2 LSB range and a ±1 LSB range, with a noise limited to 0.9 LSB@68%CL.
Starting Page	1501
Ending Page	1505
File Size	1823627
Page Count	5
File Format	PDF
ISBN	9781424427147
ISSN	10957863
DOI	10.1109/NSSMIC.2008.4774698
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2008-10-19
Publisher Place	Germany
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Energy consumption CMOS technology Analog-digital conversion Signal resolution Design optimization Sampling methods Capacitors Clocks Frequency conversion Operational amplifiers very-front-end electronics ADC comparator amplifier ILC CALICE calorimeter
Content Type	Text
Resource Type	Article

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