New ASIC boosts current transducer performance

The HAIS series of low-cost, PCB-mounted current transducers are designed to operate from a single +5V power supply.

The HAIS series of low-cost, PCB-mounted current transducers are designed to operate from a single +5V power supply.

The new transducers are available with RMS ratings of 50, 100, 150, 200 and 400A, with a measuring span of up to plus or minus three times the nominal primary current.

The aperture accepts busbars as large as 8 x 15mm, in a very compact design measuring only 33 x 29 x 14mm.

The heart of the HAIS series is a LEM ASIC that offers a number of performance improvements, in particular a more extended operating temperature range (-40 to +85C) compared with traditional discrete technology.

With the standard HAIS, the internal reference voltage of the ASIC is used to provide a fixed output offset of +2.5V.

This voltage reference is also made available on an extra pin to enable it to be fed to the reference of an A/D convertor or a DSP for example.

The user can also apply the system's voltage reference (between 2 and 2.8V) to the extra (reference) pin, to produce an output offset that is equal to the external reference.

This mode can be used to cancel the reference thermal drift.

An optional busbar (HAIS xx-TP models) is available for nominal ratings of 50 and 100A.

The transducers are CE marked, conform to the EN50178 standard and are recognised for industrial applications.

LEM Components offers a five-year warranty for each transducer.

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