KP125 EVAL BOARD Infineon Technologies, KP125 EVAL BOARD Datasheet - Page 8

• Manufacturer Part Number: KP125 EVAL BOARD
• Description: BOARD EVALUATION KP125
• Manufacturer: Infineon Technologies
• Type: Pressure Sensorr

Specifications of KP125 EVAL BOARD

• Contents: Fully Assembled Evaluation Board
• For Use With/related Products: KP125
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: KP125EVALBOARDIN

4
4.1
Pressure is detected in a capacitive way by an array of surface micromachined sensor cells.
The sensor cell output is amplified, temperature compensated and linearized to obtain an output voltage that is
proportional to the applied pressure.
The transfer function for linearization is calculated in the digital part of the sensor using third order polynomial
calculation.
The transfer function is given by the following parameters:
•
•
•
•
The output is analog and ratiometric with respect to the supply voltage.
All parameters needed for the complete calibration algorithm — such as offset, gain, temperature coefficients of
offset and gain, and linearization parameters — are determined after assembly. The parameters are stored in
internal registers in the EEPROM of the chip.
On Board Diagnostics
When the chip is not powered properly, the JFET transistors of the On Board Diagnostics (OBD) stage are self-
conducting. For example, if the GND connection is interrupted, the output is drawn strongly to V
microcontroller can set a limit for valid output signals. In the case of an error, the output voltages will be too close
to the
Data Sheet
Minimum and maximum rated pressure
Voltage at minimum rated pressure
Voltage at maximum rated pressure
Sensitivity
V
DD
or
Functional Description
Sensor
GND
potential.
8
Functional Description
Rev 2.14, 2007-11-23
Pressure Sensor
KP125
DD
. The