MLX90809 Relative Pressure Sensor 1. Features and Benefits 2. Application Examples High accuracy relative pressure sensor Automotive applications (+/-1.5%FSO) Vacuum measurement Ratiometric analog output or digital SENT Clogged filter detection output Seat lumbar cushion sensor Fully integrated IC: MEMS, analog front Industrial applications end circuitry, 16 bit microcontroller, analog back end circuitry, voltage Vacuum sensor regulators Process monitoring Large automotive temperature range Fluid pressure (low pressure/high (-40C to 150C) accuracy) Automotive qualified and automotive Consumer/Home appliance applications diagnostic features (clamping levels, broken track diagnostics, multiple internal Filter monitoring fault diagnostics) Dispensing/metering systems Factory calibrated and/or fully White goods programmable through the connector for customized calibration curves Back side exposed relative pressure sensor for higher resistance to common automotive media Assembled in a robust easy to seal package 3. Ordering information Part No. Temperature Code Package Code Option Code Packing Form Code MLX90809 L (-40C to 150C) XG EAD-000 RE MLX90809 L (-40C to 150C) XG EAD-003 RE MLX90809 L (-40C to 150C) XG EAD-007 RE MLX90809 L (-40C to 150C) XG EAD-100 RE Option code legend: EAD-000 = 0.05 to -1.05 bar relative pressure / 0.5 to 4.5 V analog output EAD-003 = 0 to 1 bar relative pressure / 0.5 to 4.5 V analog output EAD-007 = 0 to -1 bar relative pressure / 0.5 to 4.5 V analog output EAD-100 = 0.05 to -1.2 bar relative pressure / 193 to 3896 LSB SENT output REVISION 005 MARCH 2020 390109080901 MLX90809 Relative Pressure Sensor 4. Functional Diagram Overvoltage & Broken wire Test reverse voltage detection protection Vext Temperature sensor Analog & Digital Piezoresistive Regulator and DSP sensing element POR Gain & Offset Micro controller compensation Analog driver Gain & Offset temperature compensation M ADC Analog OPA Gain Pressure Linearization DAC U 16 bits Output 12 bits X Programmable filter Diagnostics Logic SENT driver Slew Rom EE SENT Ram rate FW PROM Diagnostic signals Output control Ground 5. General Description The MLX90809 is a packaged, factory calibrated, integrated relative pressure sensor delivering a ratiometric analog or digital (using the SENT protocol) signal. Use of an optimized architecture and a high density CMOS technology imparts the MLX90809 with best in class automotive EMC performance. A DSP based architecture using a 16bit microcontroller provides outstanding performance. A smart package and die assembly concept suits applications with stringent automotive temperature and stress conditions needing small drift over life. 6. Glossary of Terms Bar: Pressure unit (1bar = 100kPa) ADC: Analog to Digital Converter DAC: Digital to Analog Converter DSP: Digital Signal Processor EMC: Electro Magnetic Compatibility SENT: Single Edge Nibble Transmission FSO: Full Span Output REVISION 005 MARCH 2020 Page 2 of 15 390109080901