70 kHz Programmable Hall-Effect Current Sensor with Automotive Protections


The Melexis MLX91207 is a fully customer programmable monolithic current sensor IC in standard SO-8 package. The Hall sensor provides a high speed analog output signal proportional to the external applied flux density and additional thermometer output. The MLX91207 current sensor enables the user to construct a robust current sensor solution with fast response times < 10usec.

Fully Programmable Plug and Play Sensor

The MLX91207 current sensor is automotive qualified and particularly appropriate for DC and/or AC current measurements up to 70 kHz with ohmic isolation and low assembly cost requirements. The MLX91207 features over voltage and reverse voltage protection including broken track diagnostics and can therefore be used as a “stand-alone” current sensor being connected directly to a cable. The transfer characteristic of the MLX91207 is fully customer programmable (offset, gain, clamping levels, diagnostic functions, …).

Current Sensor Applications

In the typical application the sensor is used in combination with a ring shaped soft ferromagnetic core. The Hall-IC is placed in a small air gap and the current conductor is passed through the inner part of the ferromagnetic ring. The ferromagnetic ring concentrates and amplifies the magnetic flux on the Hall sensor IC which generates an output voltage proportional to the current.

The Melexis MLX91207 is perfectly suitable in many fields of current sensing in automotive like traditional battery monitoring, for converters in hybrid electric vehicle (HEV), electric vehicle (EV), etc. Furthermore it can be used in different applications in industrial and consumer markets like solar panels.

Product Versions

  • MLX91207CA-E: low sensitivity S=5-20mV/mT

  • MLX91207CA-G: high sensitivity S=15-40mV/mT
70 kHz Programmable Hall-Effect Current Sensor with Automotive Protections - MLX91207

Features and benefits

  • Programmable high speed current sensor

  • Fast response time < 10usec

  • Large bandwidth DC - 70kHZ

  • Over voltage and reverse polarity protection

  • Broken track diagnostic

  • Fast analog output (12 bits resolution DAC)

  • Selectable ratio-metric output

  • Thermometer output

  • Programmable switch function

  • 17 bit ID number

  • Single die SOIC8 package RoHS compliant

  • Lead-free component, suitable for lead free soldering, MSL3
Used in these


  • Automotive - Hybrid & Electric Powertrain
  • Industrial & Robotics
  • Building, Security, Home & Office Automation
  • White Goods & Household Appliances
  • Non-Automotive Transportation

Inspired Engineering

We use cookies in order to let you fully experience this website. Cookies are small files we put in your browser to mainly track usage or remember your settings of our site but they don’t tell us who you are. Want to know more about how we use these Cookies please read our Cookie policy.