Sensors Hall effect current sensor aims at electric vehicles

Sensors Hall effect current sensor aims at electric vehicles

2013/12/06

Melexis has released a fast Hall-effect current sensor for electric vehicles, hybrid vehicles, and solar generation.

Response time is 3µs, for dc and ac measurements up to 200kHz, and transfer characteristics are adjustable for sensitivity, gain and offset through control parameters stored on the built-in EEPROM.

There are two versions: MLX91208CAL for low magnetic fields (100-700mV/mT) and MLX91208CAH for medium fields (50-300mV/mT). Operating range is -40 to +150°C, with typical sensitivity drift of +/-150ppm/°C. http://www.melexis.com/MLX91208

“Sensitivity stems from the integrated magnetic concentrator layer deposited onto the semiconductor die,” said the firm. “Current sensing systems based on the series are expected to exhibit accuracy exceeding +/-0.5% at room temperature or +/-2% at the extremes of the specified temperature range.”

Output is described by Melexis as “fast analogue, 12bit resolution DAC”.

To save a pin, calibration is done using the company’s ‘programming through connector’ protocol in which the supply voltage is modulated.

Packaging is standard SO-8 package, and a 48bit ID number is stored inside.

Currently, access to the data sheet is restricted.

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