Flexible Multi-Hall-Array Sensor for High-Precision Current Sensing

The CUR 4000 is a single-axis contactless magnetic-field sensor for galvanically isolated DC and AC current measurements and can be used in high-voltage battery monitoring systems of hybrid and electric vehicles (xEV).

A flexible Multi-Hall-Array allows linear or differential magnetic-field sensing for contactless and precise current sensing up to >=2000 A.

CUR 4000 can be used for different module concepts like core-based or coreless. In the linear modes of CUR 4000, a configurable array of Hall elements enables highly accurate measurements for core-based stray-field robust sensor-module designs. The differential mode enables small coreless and stray-field robust system designs without shields.

Read-out of the complete Hall array provides an output-offset temperature-drift below ±0.05 percent full scale. Furthermore, the sensor delivers a hysteresis-free output signal. A non-linearity error of ±0.2 percent and a noise performance of ±0.005 percent full scale allows precise current measurements with a signal bandwidth of up to 8 kHz.

Current sensing modules equipped with the CUR 4000 can be programmed directly in-circuit by a microcontroller via SPI interface.

CUR 4000 is defined as ASIL-B ready SEooC (Safety Element out of Context) according to ISO 26262.

Major characteristics like gain and offset, etc. can be adjusted to the magnetic circuitry by programming the non-volatile memory. The device is qualified according to AEC-Q100-Rev-H and is designed for automotive applications with operation in an ambient temperature range (TA) of –40 °C up to +150 °C. CUR 4000 is available in a small eight-pin SOIC8 SMD package.