Four-channel self-compensating single-slope ADC for space environments

• Published in: Electronics letters 2014-04, Vol.50 (8), p.579-581
• Main Authors: Sordo-Ibáñez, S, Espejo-Meana, S, Piñero-García, B, Ragel-Morales, A, Ceballos-Cáceres, J, Muñoz-Díaz, M, Carranza-González, L, Arias-Drake, A, Mora-Gutiérrez, J.M, Lagos-Florido, M.A, Ramos-Martos, J
• Format: Article
• Language: English
• Subjects: 4‐channel self‐compensating single‐slope ADC; analogue‐digital conversion; Applied sciences; circuit feedback; Circuit properties; Circuits and systems; CMOS; CMOS digital integrated circuits; CMOS technology; Conversion; Electric potential; Electric, optical and optoelectronic circuits; Electronic circuits; Electronics; Exact sciences and technology; feedback loop; Feedback loops; multichannel high‐resolution single‐slope analogue‐to‐digital converter; process voltage and temperature variations; PVT variations; ramp generation; Ramps; Signal convertors; size 0.35 mum; Space environment; space environments; space vehicle electronics; Voltage
• ISSN: 0013-5194; 1350-911X; 1350-911X
• DOI: 10.1049/el.2014.0664

A multichannel high-resolution single-slope analogue-to-digital converter (SS ADC) is presented that automatically compensates for process, voltage and temperature variations, as well as for radiation effects, in order to be used in extreme environmental conditions. The design combines an efficient implementation by using a feedback loop that ensures an inherently monotonic and very accurate ramp generation, with high levels of configurability in terms of resolution and conversion rate, as well as input voltage range. The SS ADC was designed in a standard 0.35 µm CMOS technology. Experimental measurements of the performance and stability against radiation and temperature are presented to verify the proposed approach.