A DC-connectable multi-channel biomedical data acquisition ASIC with mains frequency cancellation

Author

Schonle, Philipp ; Schulthess, Felix ; Fateh, Schekeb ; Ulrich, Roger ; Huang, Fay ; Burger, Thomas ; Huang, Qin

Author_Institution

Integrated Syst. Lab., ETH Zurich, Zurich, Switzerland

fYear

2013

fDate

16-20 Sept. 2013

Firstpage

149

Lastpage

152

Abstract

This paper presents an 8-channel biomedical data acquisition ASIC achieving 108dB of dynamic range (DR). Each channel includes a 13bit DAC to compensate differential input offset of up to ±300mV, preventing saturation of the high-gain instrumentation amplifier. Chopper stabilization and DAC-noise low-pass filtering lead to an input-referred noise of 0.8μV_RMS. Data processing algorithms, implemented on an FPGA, are employed to remove artefacts due to sudden DAC-switching and to cancel 50/60Hz mains interference including its harmonics. The chip is fabricated in 130nm CMOS, occupying an active area of 2.2mm² and consuming 15mW from 1.2V and 3.3V supplies.

Keywords

CMOS integrated circuits; amplifiers; application specific integrated circuits; biomedical engineering; data acquisition; digital-analogue conversion; field programmable gate arrays; ASIC; CMOS; DAC-noise low-pass filtering; DAC-switching; DC-connectable multi-channel biomedical data acquisition; FPGA; chopper stabilization; data processing algorithms; differential input offset; dynamic range; frequency cancellation; harmonics; high-gain instrumentation amplifier; input-referred noise; interference; power 15 mW; size 130 nm; voltage 1.2 V to 3.3 V; word length 13 bit; Application specific integrated circuits; Data acquisition; Data processing; Electrocardiography; Electrodes; Interference; Noise;

fLanguage

English

Publisher

ieee

Conference_Titel

ESSCIRC (ESSCIRC), 2013 Proceedings of the

Conference_Location

Bucharest

ISSN

1930-8833

Print_ISBN

978-1-4799-0643-7

Type

conf

DOI

10.1109/ESSCIRC.2013.6649094

Filename

6649094