A compact curvature corrected bandgap reference in 0.35 μm CMOS process

Abstract

This paper presents the design of a compact current mode curvature corrected bandgap voltage reference fabricated in a standard 0.35 μm 3.3 V CMOS technology. The measurement results show that the circuit generates 508.5 mV reference voltage while consuming 9.8 μA from a single 3.3 V supply. The achieved temperature coefficient is less then 10 ppm/°C over a temperature range from ?40 to 130 °C after 8-bit trimming. The circuit operates down to 1.8 V with a line regulation of 781.2 ppm/V while its supply voltage changes from 1.8 to 3.6 V. The measured power supply rejection of the circuit is ?65.2 dB at 100 Hz. The rms output noise voltage integrated within the frequency range of 0.1---10 Hz is 3.75 μV. The proposed circuit occupies an area of (350 × 250 μm2) 0.0875 mm2.