Sensor Interface

The MLX90320 covers the most typical resistive type of Wheatstone bridge applications for use in an automotive environment. It is a monolithic silicon analog integrated sensor interface that converts small changes in resistors, configured in a full Wheatstone bridge on a sensing element, to large output voltage variations.
The signal conditioning includes gain adjustment, offset control and second order temperature compensation in order to accommodate variations of the different resistive sensing elements. Compensation values are stored in EEPROM and can be reprogrammed with an interface circuit and a provided software.
The MLX90320 is programmed with a single wire serial interface through the output pin. The user can specify on chip clamping levels thus creating fault detection bands. By intercepting various fault modes the MLX90320 is able to inform about the reliability of its analog output signal.

Features
- Suited cost optimized sensors: gain and
  offset correction by programmable coefficients
- Higher order temperature compensation
  provided for both gain and offset
- External or internal temperature sensor
  for compensation of temperature errors
- Over-voltage protection
- Fault detection and clamping levels
- Ratio-metric output: 0 to 5V
- Single Pin Digital Programming
- Fully analog signal path
- Temp. range: -40°C to +150°C
   max. calibration temp. +125°C

MLX90320 Data Sheet

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