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MLX91211 40 kHz conventional Hall current sensor IC

The MLX91211 is a second-generation medium-speed current sensor that senses the magnetic field generated by the current flowing through a conductor, be it a cable, a bus bar or a PCB trace. To minimize the susceptibility to external magnetic fields and maximizing the concentration of the magnetic field generated by the current flow, the sensor is typically placed inside a ferromagnetic core. The sensor has an analog output ratiometric to its supply voltage (which can be in the range of 3.135 V to 5.5 V). The MLX91211 contains a voltage regulator for stable internal supply and optimum performances.

Key features MLX91211

  • Linear Hall sensor optimized for AC and DC current sensing applications
  • Supply voltage in the range of 3.135 V to 5.5 V
  • Analog ratiometric output voltage
  • Factory trimmed magnetic sensitivity and offset
  • Medium speed sensing
        - DC to 40 kHz bandwidth
        - < 10 µs response time
  • Fast startup time enabling power gating
  • Miniature packages RoHS compliant & Green
        - TSOT-3L (SE) surface mount
        - TO92-3L (UA) through hole mount
  • Suitable for lead free soldering profile up to 260 °C, MSL3 (SE) and MSL1 (UA)
  • AEC-Q100 automotive qualified

Programming / Parameterization

The output is proportional to the sensed magnetic field perpendicular to the package surface. The device is pre-programmed with different sensitivity settings as a function of different current sensing ranges and features a factory-calibrated quiescent output voltage at 50% of the supply voltage.

The sensor is optimized for cost-sensitive applications, and comes in 2 variants:

   - The ABT version with multi-temperature trimming of the sensitivity, and high accuracy
   - The ABA version with default trimming, and standard accuracy

mlx91209 Melexis hall current sensor high speed analog sip4

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