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A Floating CMOS Bandgap Voltage Reference
for Differential Applications
by
MARCO FERRO, FRANCO SALERNO, AND RINALDO CASTELLO, MEMBER, IEEE
Abstract —The first floating CMOS bandgap Yoltage 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 + M mv
hefore trimming. The temperature coefficient measured on 30 samples
ranges from – 20 to +32 ppm/°C in tbe temperature range from O 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 milz and the circuit dissipates
6 mW when operated from a single 5-V snpply. |
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发表于 2006-10-20 16:26:30
