A fully integrated ±5A current-sensing system with ±0.25% gain error and 12μΑ offset from −40°C to +85°C

Author

Shalmany, Saleh Heidary ; Beer, Gottfried ; Draxelmayr, Dieter ; Makinwa, Kofi

Author_Institution

Delft Univ. of Technol., Delft, Netherlands

fYear

2015

fDate

17-19 June 2015

Abstract

This paper presents a fully integrated current-sensing system (CSS) that is 10x more accurate than the state-of-the-art. It consists of an on-chip shunt resistor, a ΔΣ ADC and a bandgap reference (BGR), which also senses shunt temperature. For ±5A currents, it exhibits 12μA offset and ±0.25% gain error from -40 to +85°C. This level of accuracy is achieved with the help of multiple dynamic error correction techniques, a shunt temperature compensation scheme and chip-scale packaging for low thermal and electrical resistance.

Keywords

chip scale packaging; energy gap; error correction; sigma-delta modulation; thermal resistance; BGR; CSS; bandgap reference; chip-scale packaging; current 12 muA; current 5 A; current-sensing system; delta-sigma ADC; dynamic error correction techniques; electrical resistance; gain error; low thermal resistance; on-chip shunt resistor; shunt temperature compensation scheme; temperature -40 degC to 85 degC; Accuracy; Calibration; Cascading style sheets; Current measurement; Packaging; Temperature measurement; Temperature sensors;

fLanguage

English

Publisher

ieee

Conference_Titel

VLSI Circuits (VLSI Circuits), 2015 Symposium on

Conference_Location

Kyoto

Print_ISBN

978-4-86348-502-0

Type

conf

DOI

10.1109/VLSIC.2015.7231298

Filename

7231298