MLX90320LFR-BBA-000-RE Melexis

MLX90320 Automotive sensor interface Features and Benefits Applications Examples Suited cost optimized sensors: gain and Pressure transducers, strain gauges, offset correction by programmable accelerometers, position sensors, etc. coefficients Steering systems (e.g. torque sensors) Higher order temperature compensation Safety restraints systems (e.g. seat provided for both gain and offset occupant detection) External or internal temperature sensor Braking systems (e.g. ABS, force) for compensation of temperature errors Comfort systems (e.g. air conditioning) Over-voltage protection Engine management (e.g. injection) Fault detection and clamping levels Any bridge type sensor Ratio-metric output: 0 to 5V Single Pin Digital Programming Fully analog signal path RoHS compliant Ordering Code Product Code Temperature Code Package Code Option Code Packing Form Code MLX90320 L FR BBA-000 RE MLX90320 L FR BBA-000 TU Legend: Temperature Code: L for Temperature Range -40C to 150C Package Code: FR for SSOP 209 mil Packing Form: RE for Reel, TU for Tube Ordering example: MLX90320LFR-BBA-000-RE 3901090320 Page 1 of 33 Data Sheet Rev 007 Feb/12 MLX90320 Automotive sensor interface 1 Functional diagram 2 General description The MLX90320 covers the most typical resistive type of Wheatstone bridge applications for use in an automotive environment. It is a monolithic silicon analog 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 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 signa 3901090320 Page 2 of 33 Data Sheet Rev 007 Feb/12