Multi-channel Waveform Digitization System Utilizing Switched Capacitor Array ASICs

LU Yiming; ZHAO Lei; QIN Jiajun; DENG Peipei; LIU Shubin; AN Qi

doi:10.11804/NuclPhysRev.34.04.755

Switched Capacitor Arrays (SCAs) can be employed to achieve high speed waveform digitization. In this paper, we designed an 8-channel 2 Gsps waveform digitization module using four SCA chips named FEL_SCA which was designed in our laboratory. In this module, we used a FPGA device for data readout and circuit configuration. Besides, a 128 Mb SDRAM and USB interface were integrated in this module. We have also conducted DC voltage tests, transient tests and bandwidth tests on this module. The results indicate that in the signal voltage range 100 mV~1 V, the INL is better than 1%, the RMS noise is about 1.76 mV and the -3 dB input bandwidth is 450 MHz.

Multi-channel Waveform Digitization System Utilizing Switched Capacitor Array ASICs

1. State Key Laboratory of Particle Detection and Electronic, University of Science and Technology of China, Hefei 230026, China;

2. Department of Modern Physics, University of Science and Technology of China, Hefei 230026, China

Funds: Key Research Program of Frontier Sciences, CAS (QYZDB-SSW-SLH002);Science Fund for Distinguished Young Scholars of Anhui Province (1708085J07);National Natural Science Foundation of China (11079003);Knowledge Innovation Program of Chinese Academy of Sciences (KJCX2-YW-N27)

Received Date: 2017-03-14

Rev Recd Date: 2017-04-24

Publish Date: 2017-12-20

Key words:

Abstract: Switched Capacitor Arrays (SCAs) can be employed to achieve high speed waveform digitization. In this paper, we designed an 8-channel 2 Gsps waveform digitization module using four SCA chips named FEL_SCA which was designed in our laboratory. In this module, we used a FPGA device for data readout and circuit configuration. Besides, a 128 Mb SDRAM and USB interface were integrated in this module. We have also conducted DC voltage tests, transient tests and bandwidth tests on this module. The results indicate that in the signal voltage range 100 mV~1 V, the INL is better than 1%, the RMS noise is about 1.76 mV and the -3 dB input bandwidth is 450 MHz.

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Reference (13)

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Multi-channel Waveform Digitization System Utilizing Switched Capacitor Array ASICs

doi: 10.11804/NuclPhysRev.34.04.755

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