mlx90257 Melexis Company, mlx90257 Datasheet

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mlx90257

Manufacturer Part Number
mlx90257
Description
Relative Integrated Pressure Sensor
Manufacturer
Melexis Company
Datasheet
Temperature
Diagnostics
Features and Benefits
Application Examples
Ordering Information
Part No.
MLX90257
MLX90257
The output is proportional to the applied pressure with an adjustable slope and offset. It is ratiometric and
goes rail-to-rail with a 3mA source and sink capability. Different pressure ranges are available (from 1.2 to
10 Bar full scale ranges, see above ordering information).
3901090257
Rev. 006
sensor
Relative Integrated Pressure sensor
Less than ±1% error range overall
Programmable through the connector (3 pins)
Trimmable offset and sensitivity
On-Chip Signal Conditioning
Output proportional to the applied pressure
Ratiometric output
Rail-to-rail output
Diagnostics of broken supply wires and broken sensor
Output protected against short-circuits at both battery terminals
Different pressure ranges available
Medical diagnostics
Pumps
Industrial applications
Robotics
1. Functional Diagram
ADC
VDD
DIGITAL CORE
Temperature Suffix
L (-40°C to 150°C)
L (-40°C to 150°C)
DAC
Package Code
UF (die on foil)
UF (die on foil)
demodulator
Chopper
Page 1 of 9
Relative Integrated Pressure Sensor
calibration
Gain
Option
- 2
- 4
OUT
The MLX90257 is an integrated
relative pressure sensor (2
pressure ports) realized in
CMOS technology with
micromachining options. It
consists of an analog signal
chain that interacts with the
digital core and on-chip
temperature sensor in order to
provide uniform overall sensing
characteristics after calibration
and to cancel the temperature
related parameter drifts.
2. Description
MLX90257
Description
3 to 7
15 to 30 Bar Full Scale
Bar Full Scale
Data Sheet
Mar/08

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mlx90257 Summary of contents

Page 1

... Page MLX90257 Description Bar Full Scale Bar Full Scale 2. Description The MLX90257 is an integrated relative pressure sensor (2 pressure ports) realized in CMOS technology with micromachining options. It consists of an analog signal chain that interacts with the digital core and on-chip ...

Page 2

... FUNCTIONAL DIAGRAM...................................................................................................................... 1 2. DESCRIPTION....................................................................................................................................... 2 3. ABSOLUTE MAXIMUM RATINGS ....................................................................................................... 3 4. MLX90257 ELECTRICAL SPECIFICATIONS ...................................................................................... 3 5. GENERAL DESCRIPTION .................................................................................................................... 4 6. UNIQUE FEATURES ............................................................................................................................. 4 7. PERFORMANCE GRAPHS................................................................................................................... 5 8. APPLICATION INFORMATION ............................................................................................................ 6 9. DIE DIMENSION AND PAD COORDINATES....................................................................................... 7 10. CALIBRATION AND PROGRAMMING PROCEDURE ........................................................................ 7 11. ESD PRECAUTIONS............................................................................................................................. 8 12. DISCLAIMER ......................................................................................................................................... 9 3901090257 Rev ...

Page 3

... 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. 4. MLX90257 Electrical Specifications DC Operating Parameters T = -40 A Parameter OPERATIONAL FEATURES DIAGNOSTIC FEATURES 3901090257 Rev. 006 Relative Integrated Pressure Sensor ° ...

Page 4

... Once the chip is locked in a normal application not possible to unlock. Clamping Levels The user can enable the clamping of the output to ensure that the output can not enter the fault band in normal application. 3901090257 Rev. 006 MLX90257 Relative Integrated Pressure Sensor Page Data Sheet Mar/08 ...

Page 5

... Measured Error is below for all ambient temperature and pressure points (see graphs below). Error versus Ambient Temperature with P = 0..2000 mBar 1.5 1 0.5 0 -0.5 -1 -1.5 -50 -30 -10 10 3901090257 Rev. 006 Relative Integrated Pressure Sensor Pressure %FS (FS = 2000 mBar 110 Ambient Temperature C Page MLX90257 80 90 100 130 150 Data Sheet Mar/08 ...

Page 6

... Only 3 pins are used (Vdd, Vss, Out), see pad layout drawing in paragraph 9. Calibration and Programming is made through Out pin. 3901090257 Rev. 006 Relative Integrated Pressure Sensor 750 1000 1250 1500 1750 Pressure mBar 750 1000 1250 1500 1750 Pressure mBar Page MLX90257 2000 2000 Data Sheet Mar/08 ...

Page 7

... The zapping is done when OUT is high (OUT_Z). A high current will flow during the zapping recommended to limit this current to 200mA. The memlock-bit should be zapped as last bit, as this disables programming function. 3901090257 Rev. 006 MLX90257 Relative Integrated Pressure Sensor Page Data Sheet Mar/08 ...

Page 8

... OUT & VCC = OUT_L & VCC_P OUT & VCC = OUT_H & VCC_Z OUT & VCC = OUT_H & VCC_N OUT & VCC = OUT_L & VCC_Z Normal Supply Programming Supply Zapping Supply Low Output High Output Output for zapping Page MLX90257 Data Sheet Mar/08 ...

Page 9

... Or for additional information contact Melexis Direct: Europe and Japan: Phone: +32 1367 0495 E-mail: sales_europe@melexis.com E-mail: sales_usa@melexis.com 3901090257 Rev. 006 Relative Integrated Pressure Sensor www.melexis.com All other locations: Phone: +1 603 223 2362 ISO/TS 16949 and ISO14001 Certified Page MLX90257 Data Sheet Mar/08 ...

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