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Germany / General
André Huntrieser
✆: +49 (0) 2129 - 376-202
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Field Applications Engineer
Günter Fuchs
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Tech Support
Raphael Balke
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Austria / Switzerland
Karl Eder
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The MLX90323 is a sensor interface IC with 4mA to 20mA current loop output for sensors wired in bridge or differential configurations. The IC converts small changes of output voltage of full Wheatstone resistive bridge (caused by mechanical stimulus such as pressure, force, torque, light or magnetic field) to large changes of the IC output current.
The signal conditioning includes gain adjustment, offset control, high order temperature and linearity compensation. Temperature can be measured either by internal or external (resistor) temperature sensor. Compensation values are stored in Electrically Erasable Programmable Read-Only Memory (EEPROM) and are re-programmable. Programming is accomplished by using a PC with an interface circuit (level shifting and glue logic) and provided software.
The MLX90323 works properly over wide voltage range from 6V to 35 V at the signal line.


Features Application examples
  • Microprocessor-controlled signal conditioning for bridge-type sensors
  • Suited for low-cost sensors
    • Reduction of non-linearity by programmable coefficients
    • external or internal temperature sensor for compensating temperature errors
  • 4mA to 20 mA current loop output
  • Operating voltage from 6V to 35V
  • Wide temperature range from -40°C to 125°C (Code K)
  • SOIC16WB (300mil) package
  • Industrial and Robotics
  • Strain gauges, accelerometers, position sensors, etc.
  • Building, Security, Home & Office Automation
  • Industrial pressure transducers
  • Any bridge type sensor with current loop output
  • White goods and household appliances