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ELSEVIER
DOI: 10.1016/j.nima.2022.167019
Keywords
MAPS; CMOS pixel sensor; Column-parallel ADC; Heavy-ion particle; In-pixel circuit
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Funding
- Strategic Priority Research Program of Chinese Academy of Sciences [XDB34000000]
- National Natural Science Foundation of China [U2032209, 11975292, 11875304, 12005276, 12075100, 12005278, 12005279]
- CAS Pioneer Hundred Talent Program
- National Key Research and Development Program of China [2020B0301030008]
- CAS Light of West China Program
- Guangdong Major Project of Basic and Applied Basic Research [2020B0301030008]
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This paper discusses the design of Nupix-A1, a monolithic active pixel sensor capable of simultaneously measuring particle hits' energy, arrival time, and position. It utilizes a configurable DAC array and column-parallel ADC for signal conversion and digitization.
A Monolithic Active Pixel Sensor (MAPS) named Nupix-A1 has been designed in a 130 nm process for the heavy-ion experiments at HIRFL and HIAF. The Nupix-A1 can simultaneously measure particle hits' energy, arrival time, and position. The Nupix-A1 consists of 128 x 64 pixels with the size of 30 mu m x 30 mu m. A configurable DAC array, which consists of four 10-bit voltage DACs and seven 8-bit current DACs, tunes the bias of the in-pixel circuit. The analog signal from the pixels in four adjacent columns is converted into a digital signal by an 11-bit column-parallel ADC. The digitized data is encoded, serialized, and transmitted by the 5 Gbps data transmission link. This paper will discuss the design of the Nupix-A1.
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