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Current-sensing IC boasts wide dynamic range

18 Apr 2013

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Sendyne SFP100

Sendyne reports that ultra-low-resistance shunts can be used in the field with the assistance of the SFP100 current-sensing IC to measure current ranging from tens of thousands of amperes to milliamperes. This provides accuracy levels that are previously available only in laboratory instruments. Regardless of the shunt resistance, the metrology-grade, bidirectional IC achieves an offset error of less than 150nV without calibration and throughout the entire automotive temperature range of –40°C to +125°C.

Sendyne designed the SFP100 for battery monitoring in energy-storage systems, such as those used for electric vehicles, grid storage, and photovoltaic arrays, where large variations of current need to be monitored accurately. Errors in current measurement in these systems accumulate over time, leading to incorrect predictions of the system energy capacity.

In addition to measuring bidirectional DC current across a resistive shunt, the SFP100 provides internally accumulated coulomb counting information, performs accurate voltage measurement, and measures temperature at four points using two 24bit delta-sigma ADCs. The device, which is AEC-Q100-qualified, communicates with a host system over a simple serial interface.

SFP100 current sensor brochure


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