Journal
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
Volume 623, Issue 1, Pages 486-488Publisher
ELSEVIER
DOI: 10.1016/j.nima.2010.03.045
Keywords
Switched capacitor array; Waveform sampling; DRS chip
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The high demands of modern experiments in fast waveform digitizing led to the development of a whole family of switched capacitor arrays (SCA), called the Domino Ring Sampler (DRS). The most recent version, DRS4, is produced in a radiation hard 0.25 mu m CMOS process, and is capable of digitizing 9 differential input channels at sampling rates of up to 6 Giga-samples per second (GSPS) with an analogue bandwidth of 950 MHz (-3 dB). The channel depth can be configured between 1024 and 8192 cells, and the signal-to-noise ratio allows a resolution equivalent to more than 11 bits. Using an interleaved sampling technique, sampling rates up to 48 GSPS are possible. Compared with the previous versions, the DRS4 chip contains several improvements such as an on-chip PLL for sampling-frequency stabilization and various mechanisms to reduce the read out dead-time. The high bandwidth, low power consumption and short readout time make this chip attractive for many experiments, replacing traditional ADCs and TDCs. This includes time-of-flight detectors, cosmic gamma ray observatories, PET scanners and industrial applications. (C) 2010 Elsevier B.V. All rights reserved.
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