A 2-V 23-μA 5.3-ppm/°C curvature-compensated CMOS bandgap voltage reference

A high-order curvature-compensated CMOS bandgap reference, which utilizes a temperature-dependent resistor ratio generated by a high-resistive poly resistor and a diffusion resistor, is presented in this paper. Implemented in a standard 0.6-/spl mu/m CMOS technology with V/sub thn//spl ap/|V/sub thp/|/spl ap/0.9 V at 0/spl deg/C, the proposed voltage reference can operate down to a 2-V supply and consumes a maximum supply current of 23 /spl mu/A. A temperature coefficient of 5.3 ppm//spl deg/C at a 2-V supply and a line regulation of /spl plusmn/1.43 mV/V at 27/spl deg/C are achieved. Experimental results show that the temperature drift is reduced by approximately five times when compared with a conventional bandgap reference in the same technology.

[1]  Gabriel A. Rincon-Mora,et al.  A 1.1-V current-mode and piecewise-linear curvature-corrected bandgap reference , 1998, IEEE J. Solid State Circuits.

[2]  A. Hastings.  The Art of Analog Layout , 2000 .

[3]  Gabriel A. Rincon-Mora,et al.  Voltage References: From Diodes to Precision High-Order Bandgap Circuits , 2001 .

[4]  Ka Nang Leung,et al.  A 2-V 23-/spl mu/A 5.3-ppm//spl deg/C 4th-order curvature-compensated CMOS bandgap reference , 2002, Proceedings of the IEEE 2002 Custom Integrated Circuits Conference (Cat. No.02CH37285).

[5]  J. M. Audy.  3rd order curvature corrected bandgap cell , 1995, 38th Midwest Symposium on Circuits and Systems. Proceedings.

[6]  J. F. Duque-Carrillo,et al.  Am improved tail current source for low voltage applications , 1997 .

[7]  J. F. Duque-Carrillo,et al.  An improved current source for low voltage applications , 1996, Proceedings of Custom Integrated Circuits Conference.

[8]  P.R. Gray,et al.  A precision curvature-compensated CMOS bandgap reference , 1983, IEEE Journal of Solid-State Circuits.

[9]  Gyudong Kim,et al.  Exponential curvature-compensated BiCMOS bandgap references , 1994, IEEE J. Solid State Circuits.

[10]  David A. Johns,et al.  Analog Integrated Circuit Design , 1996 .

[11]  K. Leung,et al.  A sub-1-V 15-ppm/°C CMOS bandgap voltage reference without requiring low threshold voltage device , 2002, IEEE J. Solid State Circuits.