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Voltage reference ICs deliver high accuracy

Posted: 12 Aug 2009 ?? ?Print Version ?Bookmark and Share

Keywords:voltage reference IC? regulator? capacitor?

CAT8900 voltage reference IC

ON Semiconductor has launched the CAT8900 family of high-accuracy voltage reference ICs that combines very high initial accuracy, low supply current consumption and stable temperature coefficient.

Designed for test equipment and portable, battery-powered DAQs, the CAT8900 ICs provide a highly accurate voltage reference, with initial accuracy as high as 0.02 percent (?.5mV) and a stable, 20ppm/C temperature coefficient, while maintaining a low maximum supply current consumption of 800nA. The low current consumption allows the CAT8900 voltage references to remain powered on continuously, with minimal battery load. The low power consumption, combined with the very high initial accuracy and temperature stability of the devices, make them suitable replacements for power-hungry, higher cost bandgap references in a wide range of portable applications. These include handheld medical devices, high resolution ADCs and DACs, and precision regulator systems.

The family offers nine voltage reference choices: 1.024-, 1.2-, 1.25-, 1.8-, 2.048-, 2.5-, 2.6-, 3- and 3.3V. Custom voltages are available on request. Each reference is available in four accuracy grades: 0.5-, 1-, 2.5- and 5mV. The devices source or sink up to 10mA of load current with as little as 50mV of dropout. In most applications they do not require an output bypass capacitor.

The CAT8900 precision voltage references come in a Pb-free, RoHS-compliant, 3-lead SOT-23 package. The per unit prices for quantities of 10,000 are: $0.60 for 5.0mV initial accuracy versions; $0.92 for 2.5mV initial accuracy versions; $1.55 for 1.0mV initial accuracy versions ; and $2.44 for 0.5mV initial accuracy versions. Samples are available now. Projected lead-time for production quantities is currently eight to 12 weeks after receipt of order.

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