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Data Sheet,V1.1, Oct. 2003
Surface Mount Capacitive Silicon Absolute Pressure Sensor KP120, KP120 Exxxx
Sensors
Never
stop
thinking.
Edition 2003-10-17 Published by Infineon Technologies AG, St.-Martin-Strasse 53, 81669 Munchen, Germany
(c) Infineon Technologies AG 2003.
All Rights Reserved. Attention please! The information herein is given to describe certain components and shall not be considered as a guarantee of characteristics. Terms of delivery and rights to technical change reserved. We hereby disclaim any and all warranties, including but not limited to warranties of non-infringement, regarding circuits, descriptions and charts stated herein. Information For further information on technology, delivery terms and conditions and prices please contact your nearest Infineon Technologies Office (www.infineon.com). Warnings Due to technical requirements components may contain dangerous substances. For information on the types in question please contact your nearest Infineon Technologies Office. Infineon Technologies Components may only be used in life-support devices or systems with the express written approval of Infineon Technologies, if a failure of such components can reasonably be expected to cause the failure of that life-support device or system, or to affect the safety or effectiveness of that device or system. Life support devices or systems are intended to be implanted in the human body, or to support and/or maintain and sustain and/or protect human life. If they fail, it is reasonable to assume that the health of the user or other persons may be endangered.
Surface Mount Capacitive Silicon Absolute Pressure Sensor KP120, KP120 Exxxx
Features * * * * * * Ratiometric analog output Calibrated transfer function High accuracy over a large temperature range (1.5 kPa max. error over 0 ... 85 C) CMOS compatible surface micromachining SMD housing Customized transfer functions available (KP120 Exxxx) P-DSOF-8-5
Type KP120
Ordering Code
Pressure Range
Overall Accuracy 1.2 kPa
Package P-DSOF-8-5
Q62705-K352 40 kPa - 115 kPa
Product Description The KP120 is a miniaturized absolute pressure sensor IC based on the capacitive principle. It is surface micromachined with a monolithic integrated signal conditioning circuit realized in the state-of-the-art 0.8 m BiCMOS technology. As the KP120 is a high precision IC for cost critical solutions the chip is packaged in a low cost SMD housing. High accuracy and high sensitivity enable the dedication in automotive applications as well as consumer products. In the automotive field the manifold air pressure (MAP) and barometric air pressure (BAP) are important parameters to compute the air-fuel ratio provided to the engine and for controlling spark advance to optimize engine efficiency. The IC consists of a surface micromachined pressure sensor, a sigma-delta A/Dconverter, a digital filter and the SPI-interface. In normal operation, the applied pressure has to be in the range between 10 kPa and 150 kPa and the KP120, KP120 Exxxx can deliver output voltages between 0.25 V and 4.85 V.
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KP120, KP120 Exxx
Pin Configuration (top view)
Figure 1
Pin Definitions and Functions Pin No. 1 2 3 4 5 6 7 8 Symbol N.C. SERIAL_CLK/ PROG_VOLT SERIAL_IN SERIAL_OUT Function Not to be connected Used for calibration in manufacturing Used for calibration in manufacturing Used for calibration in manufacturing 5 V Supply voltage 0 V Circuit ground potential Output Not to be connected
VDD
GND
VOUT
N.C.
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Figure 2
Block Diagram of the KP120
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Transfer Function The device is fully calibrated on delivery. The sensor has a linear transfer function between the applied pressure and the output signal:
VOUT = VDD x (a x p + b)
The output is ratiometric. The gain a and the offset b are calibrated to realize the demanded transfer function. Transfer Function KP120 With the parameters a and b the following calibration is adjusted:
pN, MIN = 40 kPa VOUT = 0.5 V and pN, MAX = 115 kPa VOUT = 4.5 V.(@VDD = 5 V)
The nominal transfer function for KP120 is given by: p V OUT = 5.000 V x ( 0.01067 x ---------- - 0.32667 ) kPa
Figure 3
Nominal Transfer Function for the KP120 Version
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KP120, KP120 Exxx
Absolute Maximum Ratings Parameter Symbol Limit Value KP120 and KP120 Exxxx min. Supply voltage Supply voltage1) Pressure overload (300 sec.) Burst pressure Ambient Temperature
1) 1h@70 C
Unit
max. 6.0 16.5 360 - 125 V V kPa kPa C
VDD VDD PMAX pBURST TA
- 0.3 - - 400 - 40
Note: Stresse above those listed here may cause permanent damage to the device. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. ESD Protection Human Body Model (HBM) tests according to: Standard EIA/JESD22-A114-B HBM (covers MIL STD 883D) Parameter ESD-Protection Symbol Limit Values min. max. 2 kV - Unit Notes
VESD
R = 1.5 k, C = 100 pF
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KP120, KP120 Exxx
Operating Range Parameter Supply voltage Supply current @ 5 V Output current (sink/source)1) Operating Ambient Temperature2) Minimum rated pressure KP120 KP120 Exxxx Maximum rated pressure KP120 KP120 Exxxx Pressure span KP120 KP120 Exxxx
1) sink current:current into device source current:current driven by device 2) -40 C ... 125 C (1000h), -40 C ... 85 C (5000h)
Symbol
Limit Value min. typ. 5.0 - - 40 - 115 - 75 - max. 5.25 9 0.25 +125 - 50 4.75 2 - 0.25 - 40 - 10
Unit V mA mA C kPa
VDD IIN IOUT TA pN, MIN
pN, MAX
- 100 - 150
kPa
PSPAN
- 70 - 105
kPa
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Electrical Characteristics VDD = 5 V, GND = 0 V, TA = 0 C to +85 C, unless otherwise specified. Parameter Output voltage at min. rated pressure KP120 KP120 Exxxx
1)
Symbol
Limit Value min. typ. 0.5 - 4.5 - max.
Unit V
VOUT, MIN
- 0.25 - 0.5
Output voltage at max. rated pressure1) KP120 KP120 Exxxx Overall accuracy2) Ratiometricity3) KP120 KP120 Exxxx Response time4) Output ripple @ f > 1 kHz @ f < 1 kHz Stabilization time5)
VOUT, MAX
- 4.5 - 4.85
V
ACC
Rat
see page 11 - - 5 - 5 - - - - 10 - 10 5 20
kPa mV
tR
- - - -
ms mVpp
ms
1) The output of the sensor is ratiometric to the supply voltage VDD within its specified range of 4.75 to 5.25 V. 2) Accuracy is the deviation in actual output from nominal output over the entire pressure and temperature range according to figure below due to all sources of error including the following:
sLinearity:
Output deviation from a straight line relationship with pressure over the specified pressure range. 3) Definition:
Rat = V OUT ( @V DD ) - V OUT ( @5 V ) --------5V
for VOUT in the range of 0.1 x VDD to 0.9 x VDD and VDD in the range of 4.75 V to 5.25 V 4) Response time is defined as the time for the incremental change in the output to go from 10% to 90% of its final value when subjected to a specified step change in pressure. 5) Stabilization time is defined as the time required for the product to meet the specified output voltage after the pressure has been stabilized.
V DD
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Circuitry It is recommended, that the input circuit of the pressure sensor IC is protected against overload voltage and electro-magnetic influences. Therefore, a 100 nF capacitance should be arranged in parallel (like shown in Figure 4). The output circuitry acts as a low pass decoupling filter (cut off frequency here: 720 Hz) between the output of the sensor IC and the A/D input of the C. Note: Circuitries of customer specific applications may deviate from this circuitry.
Figure 4
Feasible In-/Output Circuitry of the KP120, KP120 Exxxx
The output circuit is protected against short circuit to VDD and GND.
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Overall Accuracy The maximum temperature error is determined by a continuous line through four relevant break points: Break point (C) - 40 0 85 125 Overall Accuracy (kPa) KP120 2.4 1.2 1.2 2.4 Overall Accuracy (kPa) KP120 Exxxx 3.0 1.5 1.5 3.0
Figure 5
Overall Accuracy over Temperature
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Package Outlines P-DSOF-8-5 (Plastic Dual Small Outline Flat Package)
You can find all of our packages, sorts of packing and others in our Infineon Internet Page "Products": http://www.infineon.com/products. Data Sheet 12
Dimensions in mm V1.1, 2003-10-17
GMX09490
KP120, KP120 Exxx
Revision History:V1.1 Previous Version: 1.0 Page 7,8 Subjects (major changes since last revision) Sink and source current defined within operating range
We Listen to Your Comments Any information within this document that you feel is wrong, unclear or missing at all? Your feedback will help us to continuously improve the quality of this document. Please send your proposal (including a reference to this document) to: mcdocu.comments@infineon.com
Data Sheet
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V1.1, 2003-10-17
www.infineon.com
Published by Infineon Technologies AG

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