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Zetex current monitor avoids disruption of the ground plane

Posted: 04 Aug 2005 ?? ?Print Version ?Bookmark and Share

Keywords:zxct1011? current monitor? zetex semiconductors?

With a typical temperature coefficient below 100ppm/C, the ZXCT1011 current monitor from Zetex Semiconductors assures accurate measurement of DC currents over the temperature range -40C to 125C. Designed to sense current on the high side, this IC avoids any disruption of the ground plane, often a cause of offset and the loss of true ground reference. It has a typical operating current of 4?A.

Simple to use and needing few external components, the 5-pinned ZXCT1011 measures the voltage across a low value sense resistor and converts it into a proportional output current via an external shunt resistor, explained Zetex. The current is scaled by an output resistor to produce a 1 percent accurate ground referenced output voltage.

A maximum sense voltage of 500mV and a bandwidth of 1.5MHz mean the current monitor provides accurate monitoring of supply or load current in real time, and over a wide range of load currents, from microamps to hundreds of amps. Coupled with its wide input voltage range of 2.5V to 20V and ability to withstand circuit transients, the ZXCT1011 will meet the requirements of a diverse range of demanding applications in automotive, telecom and industrial control sectors.

Housed in the SOT23-5 package, the ZXCT1011 is available from Zetex distributors for 58 cents in 1,000-piece quantities.

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