A 10 bit 1 MHZ SAR ADC for automobile electronics MCU with Rail-to-Rail input swing

摘要

Based on the DAC structure of single sampling capacitor that insures the rail-to-rail input swing a 10 bit 1 MHZ SAR ADC is implemented in GSMC 0.18μm 1P6M CMOS Mixed-Signal process for automobile electronics MCU. The measurement results show that in 1.8 V power supply, 51 KHZ input frequency and 1 MHZ clock frequency, the SFDR is 71.364 dB, ENOB is 9.49 bit, total power is 2.24 mW, which meet the application requirements of automobile electronics MCU.