Abstract
Photomultiplier Tubes (PMTs) are widely used as the photon detector in high energy physics experiments for their fast response and high sensitivity. High precision charge measurement is usually required for PMT readout, and especially in cosmic ray experiments a large dynamic range is also demanded. This paper describes an Analog-to-Digital Converter (ADC) Application Specific Integrated Circuit (ASIC), which aims to work with a front-end analog ASIC to perform charge measurement based on the digital peak detection method. This ADC design is based on the power-efficient Successive Approximation Register (SAR) architecture, to achieve a 12-bit resolution with a sampling rate of up to 30 MS/s. Test results indicate that the Effective Number of Bits (ENOB) of this ADC is better than 9.2 bits with a sampling rate of 30 MS/s.
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