MLX90291 is a SMD programmable linear Hall sensor with a PWM (Pulse-Width Modulation) open-drain output targeted for small stroke rotary and linear position sensor applications. It can also be used for slow current sensing application.

All magnetic response functions of the MLX90291 are fully programmable for versatility and system tolerances reduction (End-of-Line Calibration).

The output quiescent duty-cycle PWMoq (i.e. PWM @ B = 0 Gauss), sensitivity, sensing polarity, the magnitude of sensitivity drift over temperature (TC - 1st & 2nd order), the clamping levels, the thermal PWMoq drift and the signal bandwidth, are all programmable through the connector terminals (Vdd-Vss-Out).

It features active error correction circuitry (quadrature spinning current and chopper-stabilized amplifier), which virtually eliminates the offset errors normally associated with Hall-effect devices.

The MLX90291 has a very stable thermal compensation for both the sensitivity and the Voq over a broad temperature range.

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Top features

  • PWM open-drain (low-side) output @ 125 Hz

  • 12-bit resolution

  • Adjustable sensitivity

  • Measurement range from ± 15 mT to ± 400 mT

  • In-range and out-of-range programmable output quiescent voltage (Voq)

  • Low noise output jitter

  • 16-bit customer ID number (48-bit MLX ID for traceability)

  • Extensive diagnostic features

  • SOIC-8 package (surface-mount) lead-free & RoHS compliant

  • Hall plate quadrature spinning current / chopper-stabilized amplifier

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Programmable linear Hall-effect sensor - MLX90291

Features and benefits

  • PWM open-drain (low-side) output @ 125 Hz

  • 12-bit resolution

  • Adjustable sensitivity

  • Measurement range from ± 15 mT to ± 400 mT

  • In-range and out-of-range programmable output quiescent voltage (Voq)

  • Low noise output jitter

  • 16-bit customer ID number (48-bit MLX ID for traceability)

  • Extensive diagnostic features

  • SOIC-8 package (surface-mount) lead-free & RoHS compliant

  • Hall plate quadrature spinning current / chopper-stabilized amplifier

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