A multiple-sensitivity Hall sensor featuring a low-cost temperature compensation circuit. (July 2021)

• Record Type: Journal Article
• Authors: Mo, Shaoqing; Wei, Rongshan; Zeng, Zhuoqu; He, Minghua
• Is Part Of: Microelectronics journal. Volume 113(2021)
• Publication Date: 2021-07
• Subjects: Hall sensor -- Temperature compensation -- Low noise -- Low-linearity error -- Low-cost; Microelectronics -- Periodicals; Microélectronique -- Périodiques; Microelectronics; Electronic journals; Journals - contents and abstracts; Periodicals; 621.3805
• DOI: 10.1016/j.mejo.2021.105067
• Languages: English
• ISSNs: 0959-8324

Abstract

Abstract: An integrated Hall sensor with a 100-kHz signal-sensing bandwidth suitable for current measurements is proposed in this paper. By combining feedback technology and the bandgap compensation principle, the temperature drift of the proposed Hall sensor is compensated. Α 0.095%/°C temperature drift can be achieved over a temperature ranging from −40 ​°C to +125 ​°C. The proposed Hall sensor is implemented using 180-nm CMOS technology. The overall chip size is 3 ​mm 2, with a total current consumption of 7 ​mA at a 3.3-V supply voltage. Experimental chip measurements demonstrate that the proposed Hall sensor is capable of achieving an equivalent magnetic-field noise density of 114 nT / H z and a linearity error of 1.5%.