MLX90809

Relative Pressure Sensor

Page 2 of 14

REVISION 004 – JULY 2017

390109080901

4. Functional Diagram

OPA

ADC

Temperature

sensor

Gain & Offset

compensation

16 bits

DSP

Rom

FW

Ram

EE

PROM

Pressure Linearization

Gain & Offset temperature

compensation

Programmable filter

Micro controller

DAC

Gain

Analog

Output

12 bits

Slew

rate

control

SENT

Output

Piezoresistive

sensing element

Overvoltage &

reverse voltage

protection

Analog & Digital

Regulator and

POR

Broken wire

detection

SENT driver

Analog driver

Ground

Vext

Diagnostic signals

Diagnostics Logic

Test

M

U

X

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