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november 2007 sense & control data sheet rev 1.02 absolute pressure sensor KP126N6165
edition 2007-11-23 published by infineon technologies ag 81726 mnchen, germany ? 2007 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.
data sheet 3 rev 1.02, 2007-11-23 absolute pressure sensor KP126N6165 1overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 1.1 features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 1.2 product description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 2 pin configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 3 functional block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 4 functional description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 4.1 sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 4.2 transfer function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 5 electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 5.1 absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 5.2 operating range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 5.3 sensor characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 5.4 electrical details . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 5.4.1 output voltage versus load . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 5.4.2 timings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 6 accuracy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 6.1 supply voltage influence (ratiometric error) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 6.2 overall accuracy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 7 application circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 8 package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 9 package outlines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 9.1 package dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 9.2 cap dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 9.3 footprint . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 10 emc requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 10.1 em immunity by direct power injection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 10.2 em immunity by electrical fast transients . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 11 identification code . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
data sheet 4 rev 1.02, 2007-11-23 absolute pressure sensor KP126N6165 absolute pressure sensor revision history: 2007-11-23, rev 1.02 previous version: rev 0.1 page subjects (major changes since last revision) page 5 paragraph about pressure range rephrased. page 15 KP126N6165 input pressure range increased. page 16 definition ratiometric error rephrased. formula added. previous version: rev 0.9 page 10 KP126N6165 input pressure range increased in figure. page 18 changes in recommended application circuit. page 19 page 20 reorganization of chapters package outlines and cap. previous version: rev 1.0 page 6 changes according to application circuit for gnd connection and digital pins. previous version: rev 1.01 page 12 correction of sensor characteristics output referred noise. 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: sensors@infineon.com
pg-dsof-8-12 with cap product name product type ordering code package KP126N6165 absolute pressure sensor sp000264887 pg-dsof-8-12 data sheet 5 rev 1.02, 2007-11-23 absolute pressure sensor KP126N6165 1 overview 1.1 features ? ratiometric analog output ? calibrated transfer function ? high accuracy over a large temperature range ? maximum error 1.0 kpa ? ?green? 8-pin smd housing ? on board diagnostics (obd) for broken wire detection 1.2 product description the KP126N6165 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 KP126N6165 is a high-precision ic for cost-critical solutions, the chip is packaged in a ?green? low-cost smd housing. the sensor is developed for measurement of barometric air pressure (bap). high accuracy and high sensitivity enable the deployment of this device in automotive applications as well as in consumer applications. the calibrated transfer function converts a pressure range from 60 kpa to 165 kpa into an analog output voltage between 0.2 v and 4.8 v.
data sheet 6 rev 1.02, 2007-11-23 absolute pressure sensor KP126N6165 pin configuration 2 pin configuration figure 1 pin configuration (top view, figure not to scale) table 1 pin definitions and functions pin no. name function 1 test test pin 1) 1) digital pins are used only during calibration and test. it is recommended to leave these pins floating. 2 clock / v prog external clock for communication / programming voltage 1) 3 data in serial data input pin 1) 4 data out serial data output pin 1) 5 v dd supply voltage 6 gnd 0 volt circuit ground potential 2) 2) it is recommended to connect both gnd pins. 7 v out analog pressure signal output 8 gnd alternative ground pin 2) 1 2 3 4 8 7 6 5 gnd v out gnd v dd data in test clock / v prog data out
data sheet 7 rev 1.02, 2007-11-23 absolute pressure sensor KP126N6165 functional block diagram 3 functional block diagram figure 2 block diagram a d 1 bit d a 12 bit 10 bit 1 khz linearization obd v dd clock generator temperature compensation internal reference voltage eeprom (90+22 bit) digital control test and programming interface v dd clock / v prog data in gnd data out v out 30khz 10 bit
data sheet 8 rev 1.02, 2007-11-23 absolute pressure sensor KP126N6165 functional description 4 functional description 4.1 sensor 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: ? minimum and maximum rated pressure ? voltage at minimum rated pressure ? voltage at maximum rated pressure ? sensitivity 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 dd . the microcontroller can set a limit for valid output signals. in the case of an error, the output voltages will be too close to the v dd or gnd potential.
data sheet 9 rev 1.02, 2007-11-23 absolute pressure sensor KP126N6165 functional description 4.2 transfer function the KP126N6165 device is fully calibrated on delivery. the sensor has a linear transfer function between the applied pressure and the output signal: the output is ratiometric. gain a and offset b are determined during calibration in order to create the required transfer function. standard transfer function the following calibration is adjusted with the parameters a and b : figure 3 transfer function note: the application circuitry determines the current driven by the device and thus has an impact on the diagnostic ranges. table 2 transfer function (end points) pressure output voltage @ v dd = v dd;typ symbol values unit symbol values unit p in,min 60 kpa v out,min 0.2 v p in,max 165 v out,max 4.8 v out =v dd x (a x p + b) 0 1 2 3 4 5 10 30 50 70 90 110 130 pressure (kpa) v out (v) 150 170 input pressure range maximum input pressure range
data sheet 10 rev 1.02, 2007-11-23 absolute pressure sensor KP126N6165 electrical characteristics 5 electrical characteristics 5.1 absolute maximum ratings attention: stresses above the max. values listed here 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. table 3 absolute maximum ratings parameter symbol values unit note / test condition min. typ. max. supply voltage v dd ? 0.3 ? 6.5 v ? ? 16.5 1h @ 70c ? 6.5 1) 1) reverse polarity; i dd < 300ma ? ? for max. 5 minutes output voltage v out ? 0.3 ? v dd + 0.3 v maximum ambient temperature t a ? 40 125 c storage temperature t s ? 60 150 c maximum input pressure range p max 40 5.8 ? 600 87 kpa psi for max. 5 minutes 40 5.8 ? 165 23.93 kpa psi voltage at clock / v prog pin v clk ? ? 20 v voltage at data pins (data in, data out) v data ? ? 5.0 v esd robustness 2) 2) hbm: 1.5k ? , 100pf; according to eia/jesd22-a114-b (covers mil std 883d) v esd, hbm ? ? 2 kv analog pins: v dd , vout, gnd ? ? 2 kv digital pins: clock / v prog, data out, data in
data sheet 11 rev 1.02, 2007-11-23 absolute pressure sensor KP126N6165 electrical characteristics 5.2 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 otherwise noticed. table 4 operating range parameter symbol values unit note / test condition min. typ. max. supply voltage v dd 4.5 5 5.5 v v out is ratiometric to v dd output current 1) 1) negative values: current into device (pull-up resistor used). positive values: current out of the device (pull-down resistor used). i out ? 1 ? 1 ma lifetime t lt 15 ? ? years maximum ambient temperature t a ? 40 125 c input pressure range p in 60 8.7 165 23.93 kpa psi
data sheet 12 rev 1.02, 2007-11-23 absolute pressure sensor KP126N6165 electrical characteristics 5.3 sensor characteristics table 5 sensor characteristics parameter symbol values unit note / test condition min. typ. max. output voltage range v out_r 0.10 4.85 v more information in chapter ?electrical details? on page 14 sensitivity s ? 43.8 ? mv/ kpa supply current i dd ? 8 10 ma 1) 1) a peak supply current of up to 22 ma is possible during power up. overall accuracy error err ? ? 1.0 kpa 2) 2) more details in chapter ?overall accuracy? on page 17 ratiometric error e rat ?25 ? 25 mv 3) 3) more details in ?supply voltage influence (ratiometric error)? on page 16 output referred noise v noise ? ? 2.5 mv rms @ f > 1khz 4) ) 4) 200 measurements in sequence, bandwidth limited to 40khz ? ? 1.8 @ f < 1khz response time 5) 5) more details in ?timings? on page 15 t r ? 1.8 ? ms 10% to 90% of the final output value stabilization time 10) t s ? ? 10 ms for full accuracy power up time 10) t up ? ? 5 ms 90% of the final output value broken wire: diagnosis response time 6) 6) in the event of a broken wire (broken v dd line or broken gnd line), the output changes to certain voltage levels within the broken wire response time. t obd ? ? 1 ms obd transistor on resistance r dson ? ? 160 ? v out to v dd or v out to gnd, @ 25c junction temperature 7) 7) t junction = t ambient + ? t c,j (in steady-state condition, typical operation conditions) t j ? 30.2 134.8 c thermal resistance r thj-amb 245 k/w
data sheet 13 rev 1.02, 2007-11-23 absolute pressure sensor KP126N6165 electrical characteristics 5.4 electrical details 5.4.1 output voltage versus load the output voltage limits depend on: ? the value of the external load resistor ? the connection mode (pull-up or pull-down) figure 4 maximum output voltage limit at maximum rated pressure with pull-down load figure 5 minimum output voltage limit at minimum rated pressure with pull-up load note: the values in the diagrams are valid for the entire specified temperature range. 4.50 4.60 4.70 4.80 4.90 0.0 0.2 0.4 0.6 0.8 1.0 source current (ma) pull-down resistance (k ? ) 20 10 5 50 0.1 4.85 v out 5.00 0 0.10 0.20 0.30 0.40 0.50 0.0 0.2 0.4 0.6 0.8 1.0 sink current (ma) pull-up resistance (k ? ) 20 10 5 50 0.1 v out
data sheet 14 rev 1.02, 2007-11-23 absolute pressure sensor KP126N6165 electrical characteristics 5.4.2 timings power-up time the power-on time t up is defined as the maximum time between the supply voltage reaching its operating range and the output voltage reaching 90% of its final value. figure 6 power-up time response time and stabilization time the response time t r is defined as the time for the incremental output change to go from 10% to 90% of its final value after a specified pressure step. the stabilization time t s is defined as the time required for the output voltage to meet the specified accuracy after the pressure has been stabilized. figure 7 response time and stabilization time 0 1 2 3 4 5 0 5 10 15 20 25 30 time (msec) 0 20 40 60 80 100 120 v out 90% of final value v dd pressure t up pressure (kpa) voltage (v) 0 1 2 3 4 5 02 time (msec) voltage (v) 0 20 40 60 80 100 120 pressure (kpa) v out 90% of final value pressure t r 10% of final value t s within required accuracy 1345
data sheet 15 rev 1.02, 2007-11-23 absolute pressure sensor KP126N6165 accuracy 6 accuracy the accuracy of the KP126N6165 sensor is influenced by the supply voltage (ratiometric error) and by pressure, temperature and aging. the specified value represents the theoretical value, when the actual pressure is multiplied with the transfer function, see figure 8 . the error equals the deviation between the measured output voltage value and the specified output voltage value. 6.1 supply voltage influence (ratiometric error) definition ideally, the sensor is ratiometric ? the output (v out ) scales by the same ratio that v dd increases or decreases. the ratiometric error is defined as the difference between the ratio that v dd changed and the ratio that v out changed, expressed as a percentage: the output voltage v out is ratiometric to v dd , within the range provided in table 5 . v dd must be within the operating range specified in table 4 . figure 8 ratiometric error table 6 ratiometric error supply voltage (v) max. ratiometric error (% of v dd,typ ) v dd,min 0.5 v dd,typ 0 v dd,max 0.5 e rat (%) = v out (@v dd ) - v out (@5v) x 5v v dd 5v x 100% -0.5 0 v dd,min v dd 0.5 v dd,max v dd,typ e rat (%)
data sheet 16 rev 1.02, 2007-11-23 absolute pressure sensor KP126N6165 accuracy 6.2 overall accuracy overall accuracy covers the entire pressure and temperature range from all 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 all drifting parameters during operating time. note: ratiometric signal error is not included in the overall accuracy. for error measurements, the supply voltage must have the nominal value ( v dd = v dd , typ ). the error band is determined by three continuous lines through four relevant break points: figure 9 overall error over temperature table 7 accuracy temperature point (c) error (kpa) error multiplier ? 40 2.0 2 0 1.0 1 85 1.0 1 125 2.0 2 0.0 0.5 1.0 1.5 2.0 2.5 -40 85 125 error band ( kpa) 0 t (c)
data sheet 17 rev 1.02, 2007-11-23 absolute pressure sensor KP126N6165 application circuit 7 application circuit it is recommended to protect the KP126N6165 pressure sensor ic against overload voltage and electro-magnetic interference (as shown in figure 10 ). the output circuitry acts as a low-pass decoupling filter between the sensor ic output and the a/d input of the microcontroller. figure 10 application circui try for evaluation note: it is recommended to leave digital pins clock/v prog , data in and data out floating. if these pins are grounded, it is recommended to connect both gnd pins. note: the value of load resistor r 1 or r 2 determines the current driven by the device. table 8 component values component symbol values unit note min. typ. max. pull-up resistor r 1 5 59 100 k ? only 1 resistor allowed pull-down resistor r 2 5 59 100 k ? low pass resistor r 3 3.9 22 100 k ? supply blocking capacitor c 1 10 100 100 nf output blocking capacitor c 2 0 100 100 nf low pass capacitor c 3 10 100 100 nf
data sheet 18 rev 1.02, 2007-11-23 absolute pressure sensor KP126N6165 package 8 package as well as using ?green? materials, the p g -dsof-8-12 package is optimized regarding mechanical stress influences. the package fulfills the solder conditions for lead-free board assembly. in the application it is recommended to ensure that the same pressure is applied to the whole package. the KP126N6165 is supplied with a removable plastic cap (refer to figure 12 ). the flat surface of this cap on top of the package allows handling with standard pick-and-place tools. after soldering the device to the printed circuit board (pcb), the cap on the pg-dsof-8-12 may be removed. when removing the protective cap, care should be taken to avoid damage to the device. in some applications, such as for barometric measurements, it may be appropriate to leave the protective cap on the package after the soldering process. damage to the gel is prevented. the four splits in the cap side allow a sufficient pressure coupling.
data sheet 19 rev 1.02, 2007-11-23 absolute pressure sensor KP126N6165 package outlines 9 package outlines 9.1 package dimensions figure 11 package
data sheet 20 rev 1.02, 2007-11-23 absolute pressure sensor KP126N6165 package outlines 9.2 cap dimensions figure 12 cap dimensions
data sheet 21 rev 1.02, 2007-11-23 absolute pressure sensor KP126N6165 package outlines 9.3 footprint figure 13 footprint 0 . 8 8.2 1.2 1 . 2 1 . 2 7
data sheet 22 rev 1.02, 2007-11-23 absolute pressure sensor KP126N6165 emc requirements 10 emc requirements 10.1 em immunity by direct power injection the KP126N6165 test is compliant to emc requirements for direct power injection (dpi) described in ? iso 11452-7 11-95 ? iec 62132-3 01-00. 10.2 em immunity by electrical fast transients the KP126N6165 test is compliant to emc requirements for electrical fast transients (eft) according to the hardware set up shown in figure 14 , which is based on ? iso 7637-1 08-00 ? iso/cd 7637-2 02-99 ? iso 7637-3 11-95 figure 14 hardware set up for electrical fast transients sensor
data sheet 23 rev 1.02, 2007-11-23 absolute pressure sensor KP126N6165 identification code 11 identification code the identification code is provided in a machine-readable format. the date and sales code are provided in human- readable format. figure 15 sensor identification code the marking for the KP126N6165 is on the same side of the package as pin 8. date code definition: ww: work week (1?53) yy: year (06?99) data matrix code: 8 x 18 dots, dot size: 0.15 mm x 0.15 mm yy ww kp 126 n6165 data matrix code (serial number) 8 x 18 dots dot size: 0.15 mm x 0.15 mm date code sales code sales code
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