BA P Analog Barometric Air Pressure Sensor IC KP 2 3 5 Analog Absolute Pressure Sensor Da t a S h e e t Revision 1.0, 2010-06-21 Se n s e & Co n tr o l Edition 2010-06-21 Published by Infineon Technologies AG 81726 Munich, Germany © 2010 Infineon Technologies AG All Rights Reserved. Legal Disclaimer The information given in this document shall in no event be regarded as a guarantee of conditions or characteristics. With respect to any examples or hints given herein, any typical values stated herein and/or any information regarding the application of the device, Infineon Technologies hereby disclaims any and all warranties and liabilities of any kind, including without limitation, warranties of non-infringement of intellectual property rights of any third party. Information For further information on technology, delivery terms and conditions and prices, please contact the 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 the nearest Infineon Technologies Office. Infineon Technologies components may be used in life-support devices or systems only 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. KP235 Analog Absolute Pressure Sensor Data Sheet 3 Revision 1.0, 2010-06-21 KP235 Analog Absolute Pressure Sensor KP235 Analog Absolute Pressure Sensor Revision History: 2010-06-21, Revision 1.0 Previous Revision: Revision 0.9 Page Subjects (major changes since last revision) Page 17 Comment about application circuit example added Page 18 Thermal resistance specified according JESD51-2 Change document status from preliminary to final Trademarks of Infineon Technologies AG A-GOLD™, BlueMoon™, COMNEON™, CONVERGATE™, COSIC™, C166™, CROSSAVE™, CanPAK™, CIPOS™, CoolMOS™, CoolSET™, CONVERPATH™, CORECONTROL™, DAVE™, DUALFALC™, DUSLIC™, EasyPIM™, EconoBRIDGE™, EconoDUAL™, EconoPACK™, EconoPIM™, E-GOLD™, EiceDRIVER™, EUPEC™, ELIC™, EPIC™, FALC™, FCOS™, FLEXISLIC™, GEMINAX™, GOLDMOS™, HITFET™, HybridPACK™, INCA™, ISAC™, ISOFACE™, IsoPACK™, IWORX™, M-GOLD™, MIPAQ™, ModSTACK™, MUSLIC™, my-d™, NovalithIC™, OCTALFALC™, OCTAT™, OmniTune™, OmniVia™, OptiMOS™, OPTIVERSE™, ORIGA™, PROFET™, PRO-SIL™, PrimePACK™, QUADFALC™, RASIC™, ReverSave™, SatRIC™, SCEPTRE™, SCOUT™, S-GOLD™, SensoNor™, SEROCCO™, SICOFI™, SIEGET™, SINDRION™, SLIC™, SMARTi™, SmartLEWIS™, SMINT™, SOCRATES™, TEMPFET™, thinQ!™, TrueNTRY™, TriCore™, TRENCHSTOP™, VINAX™, VINETIC™, VIONTIC™, WildPass™, X-GOLD™, XMM™, X-PMU™, XPOSYS™, XWAY™. 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Last Trademarks Update 2009-10-19 Data Sheet 4 Revision 1.0, 2010-06-21 KP235 Analog Absolute Pressure Sensor Table of Contents Table of Contents Table of Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 List of Figures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 List of Tables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 1 1.1 1.2 Product Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Target Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 2 2.1 2.2 2.3 2.4 2.5 2.5.1 2.5.2 2.6 2.7 Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Pin Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 Pin Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 Transfer Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 Accuracy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 Ratiometric Error . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 Overall Accuracy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 Output Voltage versus Load . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 Timing Properties . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 3 3.1 3.2 3.3 3.4 Specification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Application Circuit Example . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Absolute Maximum Ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Operating Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 4.1 4.2 Package Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 PG-DSOF-8-16 Outline . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 Identification Code . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 Data Sheet 5 17 17 18 19 20 Revision 1.0, 2010-06-21 KP235 Analog Absolute Pressure Sensor List of Figures List of Figures Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 6 Figure 7 Figure 8 Figure 9 Figure 10 Figure 11 Figure 12 Data Sheet Pin configuration (top view, figure not to scale) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Functional block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Transfer function. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Ratiometric error . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Accuracy for pressure acquisition. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Maximum output voltage limit with pull-down load . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Minimum output voltage limit with pull-up load . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Power-up time. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Response and stabilization time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Application circuit example . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Package outline (all dimensions in mm) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Identification Code . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 10 11 12 13 14 15 15 16 16 17 22 23 Revision 1.0, 2010-06-21 KP235 Analog Absolute Pressure Sensor List of Tables List of Tables Table 1 Table 2 Table 3 Table 4 Table 5 Table 6 Table 7 Table 8 Table 9 Data Sheet Pin Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Transfer function. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Ratiometric Error. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Accuracy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Component Values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Absolute Maximum Ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Operating Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Electrical Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Transfer Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 10 12 13 14 17 18 19 20 21 Revision 1.0, 2010-06-21 KP235 Analog Absolute Pressure Sensor Product Description KP235 1 Product Description The KP235 is a miniaturized Analog Barometric Air Pressure Sensor IC based on a capacitive principle. It is surface micromachined with a monolithic integrated signal conditioning circuit implemented in BiCMOS technology. The sensor converts a pressure into an analog output signal. The calibrated transfer function converts a pressure of 40 kPa to 115 kPa into a voltage range of 0.5 V to 4.5 V. The chip is packaged in a “green” SMD housing. The sensor has been primarily developed for measuring barometric air pressure, but can also be used in other application fields. The high accuracy and the high sensitivity of the device makes it a perfect fit for advanced automotive applications as well as in industrial and consumer applications. 1.1 Features Following features are supported by the KP235: • • • • • • High precision pressure sensing (± 1.2 kPa) Ratiometric analog output Large temperature range (-40 °C to 125 °C) Broken wire detection “Green” 8 pin SMD housing Automotive qualified 1.2 Target Applications The KP235 is defined for use in following target applications: • • • • • • Automotive applications (barometric air pressure measurement) Industrial control Consumer applications Medical applications Weather stations Altimeters Product Name Product Type Ordering Code Package Analog Absolute Pressure Sensor KP235 SP000700776 PG-DSOF-8-16 Data Sheet 8 Revision 1.0, 2010-06-21 KP235 Analog Absolute Pressure Sensor Functional Description 2 Functional Description The pressure is detected by an array of capacitive 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 computed in the digital part of the sensor using a third order polynomial calculation. The transfer function is created from the following parameters: • • Minimum and maximum rated pressure Voltage level at minimum and maximum rated pressure 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 an integrated E²PROM. The E²PROM content is protected with forward error correction (a one bit error is detected and corrected, errors of more than one bit are detected and the output signal is switched to ground potential). Open Bond Detection When the chip is not powered properly, the JFET transistors of the broken wire detection stage are selfconducting. For example, if the GND connection is interrupted, the output is drawn strongly to VDD. Similarly, if the VDD connection is broken, the output is drawn to GND. Data Sheet 9 Revision 1.0, 2010-06-21 KP235 Analog Absolute Pressure Sensor Functional Description 2.1 Pin Configuration Figure 1 shows the pin configuration. TEST 1 8 GND CLOCK / VPROG 2 7 VOUT DATA IN 3 6 GND DATA OUT 4 5 VDD Figure 1 Pin configuration (top view, figure not to scale) 2.2 Pin Description Table 1 shows the pin description. Table 1 Pin Description Pin No. Name Function 1 TEST Test pin1) 2 CLOCK / VPROG External clock for communication / programming voltage1) 3 DATA IN Serial data input pin1) 4 DATA OUT Serial data output pin1) 5 VDD Supply voltage 6 GND Circuit ground potential2) 7 VOUT Analog pressure signal output 8 GND Circuit ground potential2) 1) Digital pins are used only during calibration and test. It is recommended to leave these pins floating (in case of an open GND connection, the floating pins prevent from a cross grounding through the corresponding ESD diodes). 2) It is recommended to connect both GND pins. Data Sheet 10 Revision 1.0, 2010-06-21 KP235 Analog Absolute Pressure Sensor Functional Description 2.3 Block Diagram Figure 2 shows the functional block diagram. CLOCK / VPROG VDD Internal Reference Voltage EEPROM ( 90+22 bit ) DATA IN DATA OUT Test and Programming Interface Digital Control Temperature Compensation VOUT A D 1 bit 1 kHz D Linearization 12 bit 10 bit A 30kHz VDD Clock Generator OBD GND Figure 2 Data Sheet Functional block diagram 11 Revision 1.0, 2010-06-21 KP235 Analog Absolute Pressure Sensor Functional Description 2.4 Transfer Function The KP235 device is fully calibrated on delivery. The sensor has a linear transfer function between the applied pressure and the output signal: V OUT = VDD x (a x P + b) The output signal is ratiometric. Gain a and offset b are determined during calibration in order to generate the required transfer function. Calibrated Transfer Function The following calibration is adjusted with the parameters a and b: Table 2 Transfer function Pressure Output Voltage @ VDD = VDD,Typ Gain and Offset Symbol Values Unit Symbol Values Unit Symbol Value Unit pIN,1 40 kPa VOUT,1 0.5 V a 0.01067 1/kPa pIN,2 115 kPa VOUT,2 4.5 V b -0.32667 – VOUT [V] Note: The points pIN,1/VOUT,1 and pIN,2/VOUT,2 define the calibrated transfer function and not the operating range. The operating pressure range is defined by the parameter 2.4 “Ambient operating pressure range” on Page 19 5.0 4.0 3.0 2.0 1.0 0.0 10 30 50 70 90 110 130 150 pressure [kPa] operating pressure range maximum input pressure range Figure 3 Transfer function Note: The application circuitry determines the current driven by the device and thus may have an impact on the output voltage delivered by the sensor. Data Sheet 12 Revision 1.0, 2010-06-21 KP235 Analog Absolute Pressure Sensor Functional Description 2.5 Accuracy The accuracy of the KP235 sensor is influenced by the supply voltage (ratiometric error) as well as by pressure, temperature and aging effects. The specified value, calculated with the transfer function, represents the theoretical value (see Figure 3). The error equals the deviation between the measured output voltage value and the specified output voltage value. 2.5.1 Ratiometric Error Ideally the sensor is ratiometric - the output (VOUT) scales by the same ratio that VDD increases or decreases. The ratiometric error is defined as the difference between the ratio that VDD changed and the ratio that VOUT changed, expressed as a percentage. VOUT(@VDD) - V OUT(@5V) x ERAT (%) = 5V VDD 5V x 100% The output voltage VOUT is ratiometric to VDD. VDD must be in the operating range provided in Table 7. Table 3 Ratiometric Error Supply voltage (V) Max. ratiometric error (ERAT in % of VDD, Typ) VDD,Min ± 0.5 VDD,Typ 0 VDD,Max ± 0.5 E RAT (%) 0.5 0 -0.5 VDD,MIN VDD,TYP VDD,MAX VDD Figure 4 Ratiometric error 2.5.2 Overall Accuracy Overall accuracy covers the entire pressure and temperature range from different sources of error including the following: • Pressure: Output deviation from target transfer function over the specified pressure range • Temperature: Output deviation over the temperature range • Aging: Parameter drift over life time Data Sheet 13 Revision 1.0, 2010-06-21 KP235 Analog Absolute Pressure Sensor Functional Description Note: Ratiometric signal error is not included in the overall accuracy. For error measurements, the supply voltage must have the nominal value (VDD = VDD,Typ). The error band is determined by three continuous lines through four relevant breakpoints. Accuracy Error [kPa] Error Multiplier -40 ±2.4 2.0 0 ±1.2 1.0 85 ±1.2 1.0 125 ±2.4 2.0 error multiplier Temperature [°C] 2.5 2.0 2.4 1.5 1.0 absolute error [kPa] Table 4 1.2 0.5 0.0 -40 0 85 125 temperature [°C] Figure 5 Data Sheet Accuracy for pressure acquisition 14 Revision 1.0, 2010-06-21 KP235 Analog Absolute Pressure Sensor Functional Description 2.6 Output Voltage versus Load The output voltage limits depend on: The value of the external load resistor. The type of connection (pull-up or pull-down). VOUT [V] • • 50 5.00 20 10 pull-down resistance [kΩ] 5 4.90 4.85 4.80 4.70 4.60 4.50 0.0 Figure 6 0.1 0.2 0.4 0.6 0.8 1.0 source current [mA] Maximum output voltage limit with pull-down load pull-up resistance [kΩ] VOUT [V] 50 20 10 5 0.50 0.40 0.30 0.20 0.10 0 0.0 Figure 7 0.1 0.2 0.4 0.6 0.8 1.0 source current [mA] Minimum output voltage limit with pull-up load Note: The values in the diagrams are valid for the entire specified temperature range. The two diagrams above do not take into account clamping levels. In case clamping levels are implemented, the output voltage is clamped accordingly. Data Sheet 15 Revision 1.0, 2010-06-21 KP235 Analog Absolute Pressure Sensor Functional Description 2.7 Timing Properties voltage [V] Power-up Time The power-up time tUP is defined as the maximum time between the supply voltage reaching its operating range and the output voltage reaching 90% of its final value (assuming pin VOUT open and constant input pressure). 5 VDD 4 V OUT 3 90% of Final Value tUP 2 1 constant input pressure 0 2.5 0 5 7.5 10 12.5 15 time [ms] Figure 8 Power-up time 120 5 input pressure tS 100 within required accuracy 4 VOUT 90% of final value 3 80 60 tR 2 pressure [kPa] voltage [V] Response Time and Stabilization Time The response time tR is defined as the time required by the output to change from 10% to 90% of its final value after a specified pressure step (assuming pin VOUT open). The stabilization time tS is defined as the time required by the output to meet the specified accuracy after the pressure has been stabilized (assuming pin VOUT open). 40 10% of final value 1 20 0 0 0 1 2 3 4 5 time [ms] Figure 9 Response and stabilization time Note: The values in the diagrams are valid for the entire specified temperature range. Data Sheet 16 Revision 1.0, 2010-06-21 KP235 Analog Absolute Pressure Sensor Specification 3 Specification 3.1 Application Circuit Example It is recommended to protect the pressure sensor IC against overload and electro-magnetic interferences (as shown in Figure 10). The output circuit acts as a low-pass decoupling filter between the sensor IC output and the A/D input of the microcontroller. The shown application circuit example considers an increased cable length between the sensor and the microcontroller. A combined location on a PCB with reduced distance between the sensor and the controller allows a reduction of the numbers of the passive components (e.g. C2, R1 and R2 can be omitted). 5V n.c. n.c. 1 2 VDD Test CLOCK / VPROG 5 Ref C1 KP 2xx GND R1 6 C2 n.c. 3 DATA IN VOUT 7 n.c. 4 DATA OUT GND 8 ADC A/D in *) R3 C3 R2 *) Microcontroller GND *) R 1 and R2 only alternatively Figure 10 Application circuit example Note: It is recommended to leave the digital pins CLOCK/VPROG, DATA IN and DATA OUT floating (in case of an open GND connection, the floating pins prevent from a cross grounding through the corresponding ESD diodes). Table 5 Component Values Component Symbol Values Unit Min. Typ. Max. Pull-Up Resistor R1 5 59 100 kΩ Pull-Down Resistor R2 5 59 100 kΩ Low Pass Resistor R3 3.9 22 100 kΩ Supply Blocking Capacitor C1 10 100 100 nF Output Blocking Capacitor C2 0 100 100 nF Low Pass Capacitor C3 10 100 100 nF Data Sheet 17 Revision 1.0, 2010-06-21 KP235 Analog Absolute Pressure Sensor Specification 3.2 Absolute Maximum Ratings Table 6 Absolute Maximum Ratings Parameter Symbol Values Min. Typ. Max. Unit Note / Test Condition Number V V V – 1 h @ 70°C Limited time: Max. 300 s 1.1 Supply voltage VDD_max -0.3 – -6.51) – – – 6.5 16.5 – Output voltage VOUT -0.3 – VDD + 0.3 V – 1.2 – – 20 V – 1.3 Voltage on VCLK CLOCK / VPROG pin Voltage on DATA IN & DATA_OUT pins VDATA – – 5 V – 1.4 Storage temperature TS -60 – 150 °C – 1.5 – – 180 K/W Thermal resistance between the die and ambient; according to JESD51-2 1.6 40 – 150 600 kPa kPa 2 kV Thermal resistance RthJA Maximum input pressure pamb_max ESD robustness (HBM: 1.5 kΩ, 100 pF) VESD – – 1.7 Limited time: Max. 300 s According to EIA / JESD22-A114-E 1.8 1) Reverse polarity; IDD < 300 mA Attention: Stresses above the max. values listed in Table 6 may cause permanent damage to the device. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. Maximum ratings are absolute ratings; exceeding only one of these values may cause irreversible damage to the integrated circuit. Data Sheet 18 Revision 1.0, 2010-06-21 KP235 Analog Absolute Pressure Sensor Specification 3.3 Operating Range The following operating conditions must not be exceeded in order to ensure correct operation of the device. All parameters specified in the following sections refer to these operating conditions, unless noted otherwise. Table 7 Operating Range Parameter Symbol Values Min. Typ. Max. Unit Note / Test Condition Number 2.1 Supply voltage VDD 4.5 5.0 5.5 V VOUT is ratiometric to VDD Output current on VOUT pin IOUT – -1 – – 1 – mA mA pull-down resistor used 2.2 pull-up resistor used Operating temperature Ta -40 – 125 °C 2.3 Ambient operating pressure range pamb 40 – 115 kPa 2.4 Lifetime1) tlive 15 – – years 2.5 1) The life time shall be considered as anticipation with regard to the product that shall not extend the agreed warranty period. Data Sheet 19 Revision 1.0, 2010-06-21 KP235 Analog Absolute Pressure Sensor Specification 3.4 Characteristics Table 8 Electrical Characteristics Parameter Symbol Values Min. Typ. Max. Unit Note / Test Condition Number 3.1 Output voltage range VOUT_R 0.10 – 4.85 V See also section “Output Voltage versus Load” on Page 15 Supply current IDD – 8 10 mA During power up a peak 3.2 supply current of max. 22 mA is possible Output referred noise VNOISE – – – – 2.5 1.8 mVRMS Frequency > 1 kHz1) mVRMS Frequency < 1 kHz Response time2) tR – 0.65 1.03) ms 10% to 90% of the final 3.4 output value Stabilization time2) tS – – 10 ms For full accuracy 3.5 Power-up time2) tUP – – 5 ms 90% of the final output value 3.6 – – 1 ms 3.7 – – 160 Ω 3.8 Broken wire: tOBD Diagnosis response time4) OBD transistor on resistance RDSON 3.3 1) 200 measurements in sequence, bandwidth limited to 40kHz 2) More details in section “Timing Properties” on Page 16 3) The maximum response time considers a maximal value of 100nF for the output blocking capacitor C2 and a maximum pressure pulse equivalent 4.0V output change 4) In the event of a broken wire (broken VDD line or broken GND line), the output changes to certain voltage levels within the broken wire response time. The OBD ranges are determined by the application circuitry Data Sheet 20 Revision 1.0, 2010-06-21 KP235 Analog Absolute Pressure Sensor Specification Table 9 Transfer Function Parameter Symbol Values Unit Min. Typ. Max. Sensitivity S – 53.3 – mV /kPa Accuracy pressure (overall)1) accp -1.2 -2.4 -2.4 – – – 1.2 2.4 2.4 kPa kPa kPa Ratriometric error2) ERAT -25 – 25 mV Note / Test Condition Number 4.1 0°C up to 85 °C @ -40°C @ 125°C 4.2 4.3 1) More details in section “Overall Accuracy” on Page 13 2) More details in section “Ratiometric Error” on Page 13 Data Sheet 21 Revision 1.0, 2010-06-21 KP235 Analog Absolute Pressure Sensor Package Information 4 Package Information The PG-DSOF-8-16 package is optimized regarding external mechanical stress influences. The package fulfills the solder conditions for lead-free board assembly. Details (soldering profile, application notes, etc.) are available under: www.infineon.com/package. Note: In the application, it is recommended to ensure that the same pressure is applied to the whole package. 4.1 PG-DSOF-8-16 Outline OUTER DIMENSIONS DOES NOT INCLUDE PROTUSION OR INTRUSION OF 0.2 MAX. PER SIDE Figure 11 Data Sheet Package outline (all dimensions in mm) 22 Revision 1.0, 2010-06-21 KP235 Analog Absolute Pressure Sensor Package Information 4.2 Identification Code Figure 12 Date Code Sales Code K P 2 3 5 Data Matrix Code 8 x 18 Dots Dot Size: 0.15 mm x 0.15 mm B Y Y WW The identification code is provided in a machine readable format. The date and sales code are provided in human readable format. B: YY: WW: BE Location Year Week Identification Code The identification code for the KP235 is on the same side of the package as pin 8 (GND). Data Sheet 23 Revision 1.0, 2010-06-21 KP235 Analog Absolute Pressure Sensor Data Sheet 24 Revision 1.0, 2010-06-21 w w w . i n f i n e o n . c o m Published by Infineon Technologies AG