Linearity Evaluation of High Speed Sampling Delta- Sigma ADC Board

G.W. C. Wijayasundara, Hyung-Kew Lee, Seung-Nam Park, Hehree Cho, Mun-Seog Kim

Abstract

High-speed sampling delta-sigma ADC boards become popular in scientific and metrology researches these days and its demands on the evaluation and calibration are increasing. The aim of this research is to investigate linearity deviation for delta-sigma ADCs, NI-5922 on PXI platform, to input signal. Here, we developed a system to measure the linearity error of ADC adopting a reference sampling voltmeter and a dummy waveform generator. With this system, we evaluated the linarity error for three units of NI-5922 boards, which were combined with three different chassis based on the PXI and the PXI Express platforms. We found that the linearity error depends on the type of the PXI platforms comined with the ADC boards.

Keywords

Analog-to-Digital Converter, Delta-Sigma ADC board, DC linearity

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IMEKO-TC4-2016-19.pdf

DOI

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IMEKO TC

TC4 - Measurement of Electrical Quantities

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