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VMM1—An ASIC for Micropattern Detectors

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7 Author(s)
De Geronimo, G. ; Brookhaven Nat. Lab., Upton, NY, USA ; Fried, J. ; Shaorui Li ; Metcalfe, J.
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We present VMM1, the first prototype of a family of front-end ASICs designed for the ATLAS muon upgrade. The ASIC will operate with MICROMEGAS and TGC detectors, providing charge and timing measurements along with other features including sub-hysteresis discrimination, address of the first event in real time, and digital output per channel for Time-over-Threshold measurements. The shaper, designed via the concept of Delayed Dissipative Feedback (DDF), supports analog dynamic ranges in excess of 10 thinspace000. With a capacitance of 200 pF and a nominal peaking time of 25 ns, the ASIC offers resolution of charge and timing better than 1 fC and 1 ns, respectively, for input charges up to 2 pC. Designed in a commercial 130 nm technology it dissipates about 4.5 mW per channel.

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Nuclear Science, IEEE Transactions on  (Volume:60 ,  Issue: 3 )