The first floating CMOS bandgap voltage reference is reported. The circuit is very suitable for precision mixed-mode systems, using the differential approach, especially for the case of single supply operation. An experimental prototype, realized in a 2-pm CMOS technology, generates a continuous-time low-impedance voltage of 2.48 V 24 mV before trimming. The temperature coefficient measured on 30 samples ranges from -20 to +32 ppm/"C in the temperature range from 0 to 100°C. Thanks to the differential approach, a high-frequency power supply rejection of -50 dB at 100 kHz was achieved, which is the best ever reported. The active area of the chip is 1800 mil2 and the circuit dissipates 6 mW when operated from a single 5-V supply.
A floating CMOS bandgap voltage reference for differential applications
CASTELLO, RINALDO
1989-01-01
Abstract
The first floating CMOS bandgap voltage reference is reported. The circuit is very suitable for precision mixed-mode systems, using the differential approach, especially for the case of single supply operation. An experimental prototype, realized in a 2-pm CMOS technology, generates a continuous-time low-impedance voltage of 2.48 V 24 mV before trimming. The temperature coefficient measured on 30 samples ranges from -20 to +32 ppm/"C in the temperature range from 0 to 100°C. Thanks to the differential approach, a high-frequency power supply rejection of -50 dB at 100 kHz was achieved, which is the best ever reported. The active area of the chip is 1800 mil2 and the circuit dissipates 6 mW when operated from a single 5-V supply.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
