A fast sampling, Wilkinson ADC for Cross Strip Microchannel Plate Readout

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Beurs van Berlage

Beurs van Berlage

Poster Data-processing: 3a) Front-end Electronics


Dr Michael Cooney (University of Hawai'i at Manoa)


To accurately reconstruct the charge cloud centroid from a microchannel plate (MCP) photon event with a cross strip anode readout, a fast sampling ADC is required. The digitization chip, HalfGraph, is an 8 channel, 12 bit Wilkinson based ADC manufactured on a 0.25um TSMC CMOS process. Each channel has 32 samples with 2048 addressable storage cells and over threshold triggering capability. The sampling speed is adjustable from 0.5 – 1 Giga-sample per second. Internal logic controlled via 3-bit data bus and internal DACs allow the ASIC to use a QFN64 package for high PCB density. The output data is transmitted off chip over high speed LVDS lines.

Primary author

Dr Michael Cooney (University of Hawai'i at Manoa)


Dr Andrej Seljak (University of Hawai'i at Manoa) Dr Gary Varner (University of Hawai'i at Manoa) Mr Harley Cumming (University of Hawai'i at Manoa) Dr John Vallerga (University of California, Berkeley) Mr Rick Raffanti (Techne Instruments)

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