The readout electronics for the CMS Electromagnetic Calorimeter is
undergoing a re-design in order to cope with the LHC ugrade.
In particular, a fourfold increase in the sampling frequency
(from 40 to 160 MS/s) is required. Therefore a new readout ASIC
has been developed.
The ASIC, named LiTE-DTU, is designed in a CMOS 65 nm technology.
The LiTE-DTU embeds two 12 bits, 160 MS/s ADCs, a time window
based sample selection, lossless data compression and 1.28 Gb/s
serialization. An on-chip PLL provides the 1.28 GHz clock required by
the ADCs and the serializers from the 160 MHz clock