The MLX91377 is a linear hall sensor IC. It consists of a Hall-effect magnetic front end, an analog to digital converter, and a signal processor. Its high performance, high safety level, and redundant package option make it ideal for safety-critical systems in automotive or industrial applications.

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Top features

  • High accuracy with low thermal drift

  • Flexible output options with analog, SENT, or SPC

  • Multi-point (up to 32) programmable for high accuracy

  • ISO26262 ASIL-C Safety Element out of Context for digital output, ASIL-B Safety Element out of Context capable for analog output

  • Dual die, fully redundant TSSOP-16 package RoHS compliant for redundancy in safety-critical, high-availability systems

  • High performance linear Hall-effect sensor IC

  • On-chip signal processing for robust and accurate sensing

  • Programmable measurement range

  • Programmable linear transfer characteristic (4 or 8 multi-points or 16 or 32 Piece-Wise-Linear)

  • Selectable Short PWM Code (SPC) or analog output modes

  • SAE J2716 APR2016 SENT

  • 48-bit programmable ID number

  • AEC Q-100 Grade 0 qualified

  • Programmable with the PTC-04 and the PTC04-DB-HALL06 daughterboard
Discover all features
High-performance linear Hall-effect sensor IC - MLX91377

Product description

The MLX91377 is a high-performance linear Hall-effect sensor IC designed to meet the requirements of demanding applications such as steering torque sensing and other safety-critical automotive or industrial systems.

The MLX91377 includes a Hall element, signal conditioner, digital signal processor, and a flexible output stage offering analog, SENT, or Short PWM Code (SPC) output. Multi-point magnetic field linearization and magnet drift compensation ensures high performance and accuracy at room temperature and throughout the operating range of -40 °C to 160°C. Robustness to external disturbances and transient voltages is confirmed by the wide absolute maximum ratings including a supply and output voltage range of -18 to 28V.

Modern safety-critical systems are adding more sensors to ensure safety and availability of operation in the event of a fault. Maintaining, or reducing, wire harness size and signal count is important to aid system packaging and is supported by the bus-capable SPC output. Multiple (up to four) sensor outputs can be connected to one signal wire with each IC transmitting its data when addressed. Additionally, all ICs on a bus can be triggered to perform a magnetic signal acquisition at the same time thereby allowing for zero latency between IC measurements.

ASIL Ready - Melexis

The MLX91377 is offered as an ASIL-C or ASIL-B SEooC (Safety Element out of Context - ISO 26262) component, depending on the output format. Contact Melexis to obtain a copy of the MLX91377 safety manual which details the relevant system integration requirements. On-board diagnostics monitor the internal state of the various blocks to ensure correct and safe operation. The two fully independent dies in the TSSOP-16 package ensure that one channel remains operational in the event of a fault condition.

The MLX91377 is automotive qualified to AEC Q-100 Grade 0 and available in a lead-free RoHS package. Programming of the IC is accomplished with the use of the PTC-04 programmer and the Hall-06 daughterboard.

Features and benefits

  • High accuracy with low thermal drift

  • Flexible output options with analog, SENT, or SPC

  • Multi-point (up to 32) programmable for high accuracy

  • ISO26262 ASIL-C Safety Element out of Context for digital output, ASIL-B Safety Element out of Context capable for analog output

  • Dual die, fully redundant TSSOP-16 package RoHS compliant for redundancy in safety-critical, high-availability systems

  • High performance linear Hall-effect sensor IC

  • On-chip signal processing for robust and accurate sensing

  • Programmable measurement range

  • Programmable linear transfer characteristic (4 or 8 multi-points or 16 or 32 Piece-Wise-Linear)

  • Selectable Short PWM Code (SPC) or analog output modes

  • SAE J2716 APR2016 SENT

  • 48-bit programmable ID number

  • AEC Q-100 Grade 0 qualified

  • Programmable with the PTC-04 and the PTC04-DB-HALL06 daughterboard

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