SMP147

Medium pressure sensor for transmission control

Application & Technical Summary

The SMP147 ensures smooth and fast shifting in automatic transmissions by determining the ideal shifting pressure point with an accuracy to a tenth of a bar.

A piezo-resistance wheatstone bridge on the SMP147 membrane transforms pressure into electrically measurable resistance. The level of the electric bridge signal changes proportionally to the bend of the membrane. Signal conditioning and processing is performed by the ASIC.

Product benefits

Designed to meet ASIL requirements
Various diagnostic information available
Digital or analog interface selectable
Temperature signal available
Customized pressure ranges and transfer functions
Short circuit and ESD protected
Easy integration due to small and optimized housing
Flexible mounting possibilities
Available with digital or analog interface
Over 30 sensor variants

100% leak-proof

for a safe lifetime operation in oil

Technical Features


Type	Medium pressure sensor
Package	Hermetically sealed 3-pin disc-shaped metal housing
Range	50 kPa to 7 MPa
Interface	digital (analog)
Resolution	12 bit
Tolerance	1.2 to 1.8% FS
Supply voltage	5 V
Supply current	< 12.5 mA
Operating temperature	-40°C to 150°C