A 10bit 1MHZ SAR ADC for Automobile Electronics MCU with Rail-to-Rail Input Swing

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

[1]  Hao-Chiao Hong,et al.  A 65-fJ/Conversion-Step 0.9-V 200-kS/s Rail-to-Rail 8-bit Successive Approximation ADC , 2007, IEEE Journal of Solid-State Circuits.

[2]  G. Nicollini,et al.  A 2.7mW 1MSps 10b analog-to-digital converter with built-in reference buffer and 1LSB accuracy programmable input ranges , 2004, Proceedings of the 30th European Solid-State Circuits Conference.

[3]  Ho-Jin Park,et al.  A 1 mW 10-bit 500KSPS SAR A/D converter , 2000, 2000 IEEE International Symposium on Circuits and Systems. Emerging Technologies for the 21st Century. Proceedings (IEEE Cat No.00CH36353).

[4]  Harald Neubauer,et al.  A successive approximation A/D converter with 16 bit 200 kS/s in 0.6 /spl mu/m CMOS using self calibration and low power techniques , 2001, ICECS 2001. 8th IEEE International Conference on Electronics, Circuits and Systems (Cat. No.01EX483).

[5]  Ran Feng,et al.  IC Design of 2Ms/s 10-bit SAR ADC with Low Power , 2007, 2007 International Symposium on High Density packaging and Microsystem Integration.