KP125 - Integrated Pressure Sensor IC
for Barometric Air Pressure Measurement Applications
Product ImageThe KP125 is a miniaturized Absolute Pressure Sensor IC based on the capacitive principle. It is surface micromachined with a monolithic integrated signal conditioning circuit implemented in BiCMOS standard technology. Because the KP125 is a high-precision IC for cost-critical solutions, the chip is packaged in a "green" low-cost SMD housing.

The barometric air pressure (BAP) is an important parameter to compute the air-fuel ratio provided to the engine and for controlling spark advance to optimize engine efficiency. High accuracy and high sensitivity enable the deployment of this device in automotive applications as well as in consumer applications.

The KP125 has an input pressure range from 40kPa - 115kPa.

Applied pressure is transferred to an analog output voltage between .5V & 4.5V.
  •   Absolute air pressure measurement based on capacitive principle
  •   Cost effective solution (integrated sensor, single-chip solution)
  •   Excellent accuracy of 1.2 kPa over a large temperature range
  •   Ratiometric analog output proportional to the applied pressure
  •   Output signal fully compensated over pressure and temperature
  •   Pressure range from 40 to 115 kPa
  •   Temperature range from -40 to +125°C
  •   "Green" SMD package (PG-DSOF-8-12)
  •   Output clamping (optional)
  •   Open bond detection for supply and GND (OBD)
  •   Detection of broken pressure cells
  •   Inverse polarity protection
  •   Engine Management
  •   Altimeters
  •   Industrial Controls
  •   Weather Reporting Devices
  •   Medical
Product Brief
Pin Configuration
Functional Block Diagram
Digi-Key p/n Infineon p/n Package Operating Pressure Voltage - Rated Output Pressure
  KP125INCT-ND KP125 DSOF-8-12 40 ~ 115 kPa 4.5 ~ 5.5VDC 0.5 ~ 4.5V Absolute Datasheet Image