A Universal Micro-Sensor Interface chip with network communication bus and highly programmable sensor readout

Author

Zhang, Jichun ; Zhang, Kun ; Wang, Zhigang ; Mason, Andrew

Author_Institution

Dept. of Electr. & Comput. Engineening, Michigan State Univ., East Lansing, MI, USA

Volume

2

fYear

2002

fDate

4-7 Aug. 2002

Abstract

This paper presents a Universal Micro-Sensor Interface (UMSI) circuit designed for low-power microsystems that support multiple sensors and actuators. The interface chip contains all necessary reference, readout, control, and communication circuitry to interface a range of capacitive, resistive, voltage, or digital output devices to system control hardware. For online configuration of many parameters including readout gain and offset, this versatile chip is highly programmable through a sensor bus. The chip also incorporates a temperature sensor for compensation, an SPI interface, general purpose digital I/O, and an interrupt control unit for switch-type sensors. Fabricated in a foundry 3M 2P 0.5μm CMOS process, the die occupies 2.22mm × 2.22mm and draws 6.7 μA to 4 mA, (depending on configuration) from a 3V supply. Preliminary test results show the chip to be functional within design specifications.

Keywords

CMOS integrated circuits; field buses; low-power electronics; microsensors; programmable circuits; readout electronics; 0.5 micron; 3 V; 6.7 muA to 4 mA; CMOS circuit; Universal Micro-Sensor Interface chip; low-power microsystem; network communication bus; programmable sensor readout; Actuators; CMOS process; Circuits; Communication system control; Control systems; Foundries; Hardware; Temperature control; Temperature sensors; Voltage control;

fLanguage

English

Publisher

ieee

Conference_Titel

Circuits and Systems, 2002. MWSCAS-2002. The 2002 45th Midwest Symposium on

Print_ISBN

0-7803-7523-8

Type

conf

DOI

10.1109/MWSCAS.2002.1186844

Filename

1186844