Melexis MLX90817LXE-DBH-014-RE

The MLX90817 is a factory-calibrated, packaged absolute pressure sensor providing a ratiometric analog output. Leveraging an optimized architecture and high-density CMOS technology, the MLX90817 delivers best-in-class automotive EMC performance. The DSP architecture based on a 16-bit microcontroller excels in initial accuracy. The smart packaging and die assembly concept is suited for automotive applications demanding stringent temperature and stress conditions with long-term low drift. The MLX90817 incorporates a pressure sensing element consisting of a diaphragm in a silicon die bonded via wafer bonding over an etched cavity, with a built-in reference vacuum. The diaphragm responds to changes in absolute pressure, generating increased internal strain, particularly at the diaphragm edges. Here, piezoresistive elements are implanted into the silicon diaphragm to form a Wheatstone bridge that acts as a transducer. The analog front-end amplifies the bridge signal, performs coarse offset compensation, and carries out analog-to-digital conversion (ADC). The DSP performs temperature compensation. In addition, the digital circuitry provides filtering, linearization of the pressure signal, and clamping functionality. The device delivers an analog output proportional to pressure. A wire-break detection module actively drives the analog output to one of the supply rails when the supply or ground connection is broken. Extensive supply line protection enables the MLX90817 to handle extreme overvoltage conditions and withstand severe external disturbances. Multiple diagnostic functions (overvoltage, undervoltage, overpressure, and underpressure detection) are implemented on the 90817 and can be enabled via programmable EEPROM settings.

• High-accuracy absolute pressure sensor
• Ratiometric analog output
• System-in-Package: integrates MEMS, analog front-end circuit, 16-bit MCU, analog back-end circuit, and voltage regulator
• Wide automotive temperature range (-40°C ~ 150°C)
• Automotive-compliant with automotive diagnostic features (clamp levels, open-wire detection, multiple internal fault diagnostics)
• Factory calibrated, or fully programmable/reconfigurable via connector for custom calibration curves
• Robust, easy-to-use 4×5mm DFN package

• Automotive applications with absolute pressure range of 1 bar to 5.5 bar
• Intake manifold and turbo intake manifold pressure measurement
• Intake manifold and turbo intake manifold pressure measurement combined with temperature measurement
• LPG/CNG injectors