Data Sheet,V1.1, Oct. 2003 Surface Mount Capacitive Silicon Absolute Pressure Sensor KP120, KP120 Exxxx Sensors N e v e r s t o p t h i n k i n g . Edition 2003-10-17 Published by Infineon Technologies AG, St.-Martin-Strasse 53, 81669 München, Germany © 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 Ordering Code Pressure Range KP120 Q62705-K352 40 kPa - 115 kPa Overall Accuracy Package 1.2 kPa P-DSOF-8-5 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 µm 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. Data Sheet 3 V1.1 2003-10-17 KP120, KP120 Exxx Pin Configuration (top view) Figure 1 Pin Definitions and Functions Pin No. Symbol Function 1 N.C. Not to be connected 2 SERIAL_CLK/ PROG_VOLT Used for calibration in manufacturing 3 SERIAL_IN Used for calibration in manufacturing 4 SERIAL_OUT Used for calibration in manufacturing 5 VDD 5 V Supply voltage 6 GND 0 V Circuit ground potential 7 VOUT Output 8 N.C. Not to be connected Data Sheet 4 V1.1, 2003-10-17 KP120, KP120 Exxx Figure 2 Data Sheet Block Diagram of the KP120 5 V1.1, 2003-10-17 KP120, KP120 Exxx 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 × (a × 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 - – 0.32667 ) V OUT = 5.000 V × ( 0.01067 × ---------kPa Figure 3 Data Sheet Nominal Transfer Function for the KP120 Version 6 V1.1, 2003-10-17 KP120, KP120 Exxx Absolute Maximum Ratings Parameter Symbol VDD VDD PMAX pBURST TA Supply voltage Supply voltage1) Pressure overload (300 sec.) Burst pressure Ambient Temperature Limit Value KP120 and KP120 Exxxx Unit min. max. – 0.3 6.0 V – 16.5 V – 360 kPa 400 – kPa – 40 125 °C 1) 1h@70 °C 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 Data Sheet Symbol VESD Limit Values min. max. – ±2 7 Unit Notes kV R = 1.5 kΩ, C = 100 pF V1.1, 2003-10-17 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 Symbol VDD IIN IOUT TA pN, MIN Limit Value min. typ. max. 4.75 5.0 5.25 V 2 – 9 mA 0.25 mA +125 °C – 0.25 – 40 pN, MAX Pressure span KP120 KP120 Exxxx PSPAN – kPa – 10 Maximum rated pressure KP120 KP120 Exxxx Unit 40 – – 50 kPa – 100 115 – – 150 kPa – 70 75 – – 105 1) sink current:current into device source current:current driven by device 2) -40 °C ... 125 °C (1000h), -40 °C ... 85 °C (5000h) Data Sheet 8 V1.1, 2003-10-17 KP120, KP120 Exxx Electrical Characteristics VDD = 5 V, GND = 0 V, TA = 0 °C to +85 °C, unless otherwise specified. Parameter Symbol Limit Value min. Output voltage at min. rated pressure KP120 KP120 Exxxx 1) typ. Unit max. VOUT, MIN V – 0.25 Output voltage at max. rated pressure1) KP120 KP120 Exxxx VOUT, MAX Overall accuracy2) ACC Ratiometricity3) KP120 KP120 Exxxx Rat Response time4) tR 0.5 – – 0.5 V – 4.5 4.5 – – 4.85 see page 11 kPa mV – – 5 – – 10 – 5 – Output ripple @ f > 1 kHz @ f < 1 kHz – – – – 10 5 Stabilization time5) – – 20 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: ■Linearity: Output deviation from a straight line relationship with pressure over the specified pressure range. 3) Definition: V DD Rat = V OUT ( @ V DD ) – V OUT ( @5 V ) ---------5V for VOUT in the range of 0.1 × VDD to 0.9 × 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. Data Sheet 9 V1.1, 2003-10-17 KP120, KP120 Exxx 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 <Fett>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 µC. 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. Data Sheet 10 V1.1, 2003-10-17 KP120, KP120 Exxx Overall Accuracy The maximum temperature error is determined by a continuous line through four relevant break points: Break point (°C) Overall Accuracy (kPa) KP120 Overall Accuracy (kPa) KP120 Exxxx – 40 ± 2.4 ± 3.0 0 ± 1.2 ± 1.5 85 ± 1.2 ± 1.5 125 ± 2.4 ± 3.0 Figure 5 Data Sheet Overall Accuracy over Temperature 11 V1.1, 2003-10-17 KP120, KP120 Exxx Package Outlines GMX09490 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 KP120, KP120 Exxx Revision History:V1.1 Previous Version: 1.0 Page Subjects (major changes since last revision) 7,8 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: [email protected] Data Sheet 13 V1.1, 2003-10-17 w w w . i n f i n e o n . c o m Published by Infineon Technologies AG