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The design of low-noise bandgap references

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3 Author(s)
van Staveren, A. ; Dept. of Electr. Eng., Delft Univ. of Technol., Netherlands ; Verhoeven, C.J.M. ; van Roermund, A.H.M.

The noise power of bandgap references is directly related to the current consumption of the bandgap reference. This paper describes the design of low-noise bandgap references. It is shown that for an idealized bandgap reference, a fundamental noise limit exists when the limited current consumption is a constraint. A design example is given of a 1 V bipolar bandgap reference with a current consumption of 5 μA. The output voltage is 200 mV and the mean temperature dependency is ≈20 ppm/K for 0°C to 100°C. The output noise density equals 166 nV/√Hz

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Circuits and Systems I: Fundamental Theory and Applications, IEEE Transactions on  (Volume:43 ,  Issue: 4 )