MLX90809 Datasheet, PDF (2/11 Pages) Melexis Microelectronic Systems – Relative Pressure Sensor

MLX90809
Relative Pressure Sensor
1 Functional Diagram
2 General Description
Piezoresistive
sensing element
Temperature
sensor
Gain & Offset
compensation
OPA
Diagnostic signals
Broken wire
Overvoltage &
Test
detection
reverse voltage
protection
Vext
DSP
Analog & Digital
Regulator and
POR
Micro controller
Gain & Offset temperature
M
ADC
U
16 bits
compensation
Pressure Linearization
X
Programmable filter
DAC
12 bits
Analog driver
Analog
Gain
Output
Diagnostics Logic
SENT driver
Rom
FW
EE
PROM
Ram
Slew
rate
control
SENT
Output
Ground
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 90809 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.
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
Supply Voltage (overvoltage)
Remark 1 18
Reverse Voltage Protection
Remark 2 -14
Positive output voltage
Remark 1 18
Reverse output voltage
Remark 1 -0.5
Operating Temperature Range
-40 to 150
Storage Temperature Range
-40 to 150
Burst pressure (Room Temperature)
5
(AEC Q100 002)
Table 1: Absolute maximum ratings
Units
V
V
V
V
C
C
Bar
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
390109080901
Page 2 of 11
Data Sheet
Oct/14