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Voltage reference vastly reduces energy consumption over typical solution

Posted: 03 Mar 2009 ?? ?Print Version ?Bookmark and Share

Keywords:reference voltage? reduce energy? solution power?

Using a shunt reference and op amp, a low-power, low-voltage series reference can be designed. The circuit consumes very low power (2.4?A) and offers excellent line regulation (90dB) and load regulation (0.1V/A). This circuit provides excellent performance compared to many series references currently available.

The average voltage reference draws around 440?A of quiescent current. By combining two small ICs and a few external resistors, designers can cut that voltage-reference current consumption to a paltry 2.4?A, thus vastly reducing energy use. The circuit presented here is appropriate for most reference needs, such as in data conversion circuits and digital voltmeters.

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