Abstract
The readout electronics upgrade for the ATLAS Liquid Argon Calorimeters at the CERN Large Hadron Collider requires a radiation-hard ADC. The design of a radiation-hard dual-channel 12-bit 40MS/s pipeline ADC for this use is presented. The design consists of two pipeline A/D channels each with four Multiplying Digital-to-Analog Converters followed by 8-bit Successive-Approximation-Register analog-to-digital converters. The custom design, fabricated in a commercial 130nm CMOS process, shows a performance of 67.9dB SNDR at 10MHz for a single channel at 40MS/s, with a latency of 87.5ns (to first bit read out), while its total power consumption is 50mW/channel. The chip uses two power supply voltages: 1.2 and 2.5V. The sensitivity to single event effects during irradiation is measured and determined to meet the system requirements.
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