Abstract
The silicon strip sensors for the Micro Vertex Detector (MVD) of the PANDA experiment must provide both the Time of Arrival (ToA) and the charge released by the crossing particle. In order to cope with these requirements a 64-channel dedicated ASIC, named ToASt, has been designed and extensively tested. Each channel includes a charge-sensitive amplifier, a current mode shaper, a linear Time over Threshold (ToT) stage and double threshold discrimination. The ToA and ToT are obtained by storing the value of a 12-bit time stamp at the two edges of the comparator. The two values are immediately readout by a digital interface, formatted in 32-bit words and transmitted, via two 160 MS/s serial links.The ToASt ASIC is designed in a commercial CMOS 110 nm technology. Its digital logic has been triplicated in order to improve its Single-Event Upset (SEU) protection.
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