250 kHz High accuracy IMC-Hall® current sensor IC with improved diagnostics

MLX91216

The MLX91216 is part of the Gen 2.5 high speed current sensor IC portfolio, targeting primarily inverter/converter applications. With the IMC-Hall® technology - using a flexible U-shield for crosstalk immunity - currents can be measured in the range of ±100A to ±1500A. The magnetic flux density inside the shield is amplified by the on-chip Integrated Magnetic Concentrator (IMC), then measured with embedded Hall-effect technology and amplified to a 5V full-scale ratiometric and fast analog output. The novel CMOS Hall-effect sensor is offered with different factory trimmed offset, sensitivity and filtering settings, but are customer programmable using the Melexis programming equipment PTC-04.

The main changes over the Gen 2 MLX91208 are:

  • Higher accuracy
    • Thermal offset drift of ±5 mV (50% improvement)
    • Thermal sensitivity drift of ±1% (33% improvement)
  • Improved diagnostics
    • Broken Wire detection
    • Programmable output clamping levels
  • Extended on-chip filtering

The SOIC8 package and U-shield allow for vertical stacking and easy mechanical assembly, lower weight and true surface mount manufacturing processes. The IMC-Hall® technology lends itself very well to vibration-rich environments such as those witnessed when electrification moves closer to e.g. vibrant transmission environments.

The following factory trim variants are available:

  • MLX91216LDC-ACH-000 with 100mV/mT sensitivity and bipolar output around 2.5 V
  • MLX91216LDC-ACV-000 with 40mV/mT sensitivity and bipolar output around 2.5 V
  • MLX91216LDC-ACV-001 with 60mV/mT sensitivity and bipolar output around 2.5 V
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Top features

  • Measurement range ±25mT (High Field IMC) and ±60mT (Very High Field IMC)

  • High accuracy

  • Fast response time < 3 μs

  • AEC-Q100 Grade 0 qualified

  • Broken wire diagnostics & clamping

  • Programmable gain, offset, filtering, clamping, …

  • Fast analog ratiometric output

  • Wideband: DC to 250kHz

  • SOIC8 package, RoHS, MSL-3

  • 48bit unique ID for traceability
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250 kHz High accuracy IMC-Hall® current sensor IC with improved diagnostics - MLX91216

Features and benefits

  • Measurement range ±25mT (High Field IMC) and ±60mT (Very High Field IMC)

  • High accuracy

  • Fast response time < 3 μs

  • AEC-Q100 Grade 0 qualified

  • Broken wire diagnostics & clamping

  • Programmable gain, offset, filtering, clamping, …

  • Fast analog ratiometric output

  • Wideband: DC to 250kHz

  • SOIC8 package, RoHS, MSL-3

  • 48bit unique ID for traceability

Videos

Hall-effect current sensors offering enhanced performance and diagnostics

Product

In this video, Bruno Boury, Product Line Manager Magnetic Sensing at Melexis, introduces the latest Hall-effect-based current measuring solutions draw upon Melexis’ extensive experience in this area, with millions of devices sold.

Inspired Engineering