Design of a curvature-corrected bandgap reference with 7.5ppm/C temperature coefficient in 0.35µm CMOS process

This paper presents the design of high-precision curvature-corrected bandgap voltage reference circuit realized in 0.35μm CMOS technology. The circuit generates an output voltage of 500mV with temperature coefficient of 7.5ppm/C over a temperature range of -30C to 120C, with a power supply rejection ratio of 58dB at 100Hz, and an rms output noise of 5.33μV integrated from 0.1Hz to 10Hz. The circuit operates down to 1.8 volts with a line sensitivity of 0.12%/V. The design consumes 9.74μA of supply current, and occupies an area of 0.075mm².