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Bosch semiconductors for Automotive

SMP581 - Barometric pressure sensor

Barometric pressure sensor for engine control units

Application & Technical Summary

SMP581

The SMP581 is designed to measure the current ambient barometric pressure, which continuously fluctuates based on altitude, weather conditions and ambient temperature.

A piezo-resistance wheatstone bridge on the SMP581 membrane transforms pressure into electrically measurable resistance. Signal conditioning and processing is performed by the ASIC.

Product benefits

  • High measurement accuracy and long-term stability
  • Digital interface for pressure and temperature output
  • Very low current consumption of under 15 µA in power-down mode
  • Customized pressure ranges and transfer functions upon request
  • Very robust design

ultra compact

smallest package on the market

Technical Features

Type
Barometric pressure sensor
Package
DFN8
Range
40 to 115 kPa
Interface
SPI
Data resolution
10 or 12 bit
Sensitivity
13.64 LSB/kPa
51.48 LSB/kPa
Tolerance
≤1.0 kPa (pressure)
≤3 K (temperature)
Supply voltage
3.3 to 5 V
Supply current
< 5mA
Operating temperature
-40°C to 125°C
  • DFN8, package, SMP581_package
    DFN8

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