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Comparator touts 'highest-accuracy' signal detection

Posted: 08 Nov 2007 ?? ?Print Version ?Bookmark and Share

Keywords:precision comparator? hysteresis? power supply?

National Semiconductor Corp. has introduced a low-power precision comparator with integrated 2.048V reference that provides adjustable hysteresis for the highest accuracy signal detection in power supply and battery monitors, sensor interfaces and threshold detectors.

The LMP730's adjustable hysteresis improves the noise immunity of the comparator and prevents false readings by providing the flexibility to develop precise bidirectional threshold trip points that are positive, negative, symmetric or asymmetric. In addition, the two threshold trip points are independent of one another to further simplify designs without interdependency constraints, said National.

The comparator's low-offset voltage of 300?V and low supply current of 10?A make it suitable for precision battery-operated systems. It offers a wide supply voltage range of 2.7V to 12V for use in 3.3V, 5V, and 5V applications. A 2.048V reference voltage with 0.25 percent maximum error provides a precise input monitoring voltage reference level. The comparator's propagation delay is less than 5?s to enable fast, precise, low-power signal detection.

The LMP7300 is the latest addition to the company's PowerWise energy-efficient product family.

The LMP7300 is available now in an 8-pin SOIC package for $1.05 in quantities of 1,000.

- Gina Roos

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