A -80dB PSRR 1.166ppm/°C bandgap voltage reference with improved high-order temperature compensation

Abstract

A novel high precision and high PSRR bandgap voltage reference with improved high-order temperature compensation is proposed in this paper. An accurate curvature compensation topology is designed to compensate the reference voltage in the high and low temperature sections respectively. A pre-regular circuit is deployed to improve the PSRR and enlarge input voltage range. Implemented with TSMC 0.18um process, this design achieves an ultra-low temperature coefficient (TC) of 1.166ppm/°C from -40°C to 125°C with a high PSRR of -80dB at 1KHz.