MLX90809
Relative Pressure Sensor
Features and Benefits 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 end Industrial applications
circuitry, 16 bit microcontroller, analog back Vacuum sensor
end circuitry, voltage regulators Process monitoring
Large automotive temperature range (-40C to Fluid pressure (low pressure/high
150C) accuracy)
Automotive qualified and automotive Consumer/Home appliance applications
diagnostic features (clamping levels, broken Filter monitoring
track diagnostics, multiple internal fault Dispensing/metering systems
diagnostics) White goods
Factory calibrated and/or fully 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
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-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-100 = 0.05 to -1.2 bar relative pressure / 193 to 3896 LSB SENT output
Rev 002 Page 1 of 11 Data Sheet
390109080901 Oct/14 MLX90809
Relative Pressure Sensor
1 Functional Diagram 2 General Description
The MLX90809 is a packaged, factory calibrated,
integrated relative pressure sensor delivering a
ratiometric analog or digital (using the SENT
Overvoltage &
Broken wire
Test reverse voltage
detection
protection
Vext protocol) signal.
Temperature
sensor
Analog & Digital
Use of an optimized architecture and a high
Piezoresistive Regulator and
DSP
sensing element
POR
Gain & Offset
density CMOS technology imparts the 90809 with
Micro controller
compensation
Analog driver
Gain & Offset temperature
best in class automotive EMC performance. A
compensation
M
ADC Analog
OPA
Gain
U Pressure Linearization DAC
16 bits
Output
12 bits
DSP based architecture using a 16bit
X
Programmable filter
Diagnostics Logic SENT driver
microcontroller provides outstanding performance.
Rom EE Slew SENT
Ram rate
FW PROM
Diagnostic signals
Output A smart package and die assembly concept suits
control
Ground
applications with stringent automotive temperature
and stress conditions needing small drift over life.
3 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
4 Absolute Maximum Ratings
Exceeding the absolute maximum ratings may cause permanent damage. Exposure to absolute-maximum-
rated conditions for extended periods may affect device reliability.
Parameter Remarks Value Units
Supply Voltage (overvoltage) Remark 1 18 V
Reverse Voltage Protection Remark 2 -14 V
Positive output voltage Remark 1 18 V
Reverse output voltage Remark 1 -0.5 V
Operating Temperature Range -40 to 150
C
Storage Temperature Range -40 to 150 C
Burst pressure (Room Temperature) 5 Bar
(AEC Q100 002)
Table 1: Absolute maximum ratings
Remark 1: No time limit or temperature limit for these over voltage conditions.
Remark 2: Reverse Voltage Protection at -14V at 150 C for maximum 1 hour. At Room Temperature that
condition can apply for maximum 24 hours.
Rev 002 Page 2 of 11 Data Sheet
390109080901 Oct/14