SMP581
Barometric pressure sensor for engine control units
Application & Technical Summary
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
