Micromegas and GEMs semi digital read out chip
GEMROC 1
GEMROC1 IS DEPRECATED – NOT RECOMMENDED FOR NEW DESIGN Please consider Psiroc for new design
GEMROC is a 64-channel front-end ASIC designed to readout negative fast (<1ns) and short (<10ns) current pulses from low gain detectors (GEMs, Micromegas, …). GEMROC 1 provides a semi-digital readout with three thresholds tunable from 1 fC to 500 fC and integrates a 128-deep digital memory to store the 2 x 64 discriminator outputs as well as the timestamp from a 24b counter. The three thresholds are set internally by three 10-bit DACs. The gain of each channel can be tuned individually from 0 to 2 over 8 bits, allowing the compensation of non-uniformity between the 64 detector channels. Each channel can auto trigger down to 1 fC input charge. A multiplexed charge measurement up to 500fC is integrated.
The power consumption is 1.5 mW/channel and the chip can be fully power-pulsed allowing a significant power reduction by disabling unused blocks.
Features
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Packages: PQFP160
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Optimized for GEMs, Micromegas
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Number of channels: 64
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Outputs: 2 encoded data outputs per channel streamed out in serial, 1 multiplexed charge output, 3 multiplexed trigger outputs or 3 trigger OR of the 64 channels
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Input Polarity: Negative
GEMROC 1: Download
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