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IAS: Analogue Current Sensor for High-Side Shunt-based Current Monitoring

27th May 2010

ES Admin

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At the Sensor+Test fair in Nuremberg, Isabellenhütte unveiled its precision current sensor with analogue voltage output. The new sensor, the IAS, does not require a digital interface or digital converter, reducing size and costs – an important benefit for users in many different fields (e.g. automotive applications, energy management systems and general current sensing applications). The choice of used shunts ranges from 0.1 to 1 mOhm, meaning the measurement area and the dynamic range can be set for up to 100 dB; with a 500-µOhm, for example, pulse current of 800 A can be measured for 100 ms at a resolution of more than 20 mA.

The IAS is a good alternative to magnetic converters and boasts advantages such as shunt-based measurement with good long-term stability of more than 0.5 %, good linearity coupled with high dynamic response, and compact dimensions to the point.
The IAS is also a suitable alternative to DIN Shunts. Here, the main benefits lie in the far lower losses coupled with greater resolution caused by the use of low-resistance shunts.

A further merit of the new sensor is high-side measurement, meaning no separate supply voltage is needed. The typical offset for unidirectional operation is < 3 µV. The operating temperature range can be adjusted within a range of – 40 to + 125 °C, depending on the application. The use of a controller enables customers to read out or process the 0 - 5 V output signals.