KP212F1701 INFINEON | Alldatasheet

Document overview

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Technical content

Features

  • High precision pressure sensing (± 1.4 kPa)
  • Ratiometric analog output
  • Large temperature range (-40 °C to 125 °C)
  • Broken wire detection
  • Clamping
  • “Green” 8 pin SMD housing
  • Automotive qualified

Applications

The KP212F1701 is defined for use in following target applications:

  • Two wheeler applications (manifold air pressure measurement)
  • Industrial control
  • Consumer application
  • Medical application

Description

The KP212F1701 is a miniaturized Analog Manifold Air Pressure Sensor IC based on a capacitive principle. It is surface micromachined with a mon olithic integrated signal condi tioning circuit implemented in BiCMOS technology. The sensor converts a pressure into an analog output signal. Th e calibrated transfer function converts a pressure of 10 kPa to 115 kPa into a voltage range of 0.4 V to 4.65 V. The chip is packaged in a “green” SMD housing. The sensor has been primarily developed for measuring manifold air pressure, but can also be used in other application fields. The high accuracy and t he high sensitivity of the device makes it a perfect fit for advanced automotive applicati ons as well as in industrial and consumer applications. Type Package Ordering Code Marking KP212F1701 PG-DSOF-8-16 SP005435487 KP212F1701

Data Sheet 2 Revision 1.0 2020-07-08 KP212F1701 Analog Absolute Pressure Sensor Table of Contents

Data Sheet 3 Revision 1.0 2020-07-08 KP212F1701 Analog Absolute Pressure Sensor Functional Description

1 Functional Description

The pressure is detected by an array of capacitive surface micr omachined 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
  • Clamping levels 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). Clamping The output voltage is limited inte rnally to two clamping thresh old levels. Based on this feature, the open bond detection (OBD) is simplified and improved. Open Bond Detection The open bond detection, in conjunction with the clamping level s, eases the implementation of error and malfunction detection strategies (e.g. for On-Board Diagnosis requirements). The microcontroller can sample the output of the sensor and compare it with programmed overvoltage and undervoltage limits. When the sensor’s output voltage exceeds those limits, a broken wire condition is identified. When the chip is not powered properly, the JFET transistors of the broken wire detection stage are self-conducting. For example, if the GND connectio n is interrupted, the output i s drawn strongly to VDD. Similarly, if the VDD connection is broken, the output is drawn to GND.

Data Sheet 4 Revision 1.0 2020-07-08 KP212F1701 Analog Absolute Pressure Sensor Functional Description

1.1 Pin Configuration

Figure 1 shows the pin configuration. Figure 1 Pin configuration (to p view, figure not to scale)

1.2 Pin Description

Table 1 shows the pin description. Table 1 Pin Description 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 (in case of an open GND connection, the floating pins prevent from a cross grounding through the corresponding ESD diodes). 2C L O C K / V PROG External clock for communication / programming voltage1)

3 DATA IN Serial data input pin 1)

4 DATA OUT Serial data output pin 1)

6 GND Circuit ground potential 2)

2) It is recommended to connect both GND pins. 7V OUT Analog pressure signal output

8 GND Circuit ground potential 2)

V DD DATA IN TEST CLOCK / VPROG DATA OUT

Data Sheet 5 Revision 1.0 2020-07-08 KP212F1701 Analog Absolute Pressure Sensor Functional Description

1.3 Block Diagram

Figure 2 shows the functional block diagram. Figure 2 Functional block diagram A D 1 bit D A 12 bit 1 kHz Linearization OBD VDD Clock Generator Temperature Compensation Internal Reference Voltage EEPROM ( 90+22 bit ) Digital Control Test and Programming Interface VDD CLOCK / VPROG DATA IN GND DATA OUT VOUT 30kHz 10 bit Clamping 10 bit

Data Sheet 6 Revision 1.0 2020-07-08 KP212F1701 Analog Absolute Pressure Sensor Functional Description

1.4 Transfer Function

The KP212F1701 device is fully calibrated on delivery. The sens or has a linear transfer function between the applied pressure and the output signal: 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: Note: The points p IN,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 13. Figure 3 Transfer function Note: The application circuitry determ ines the current driven by the device and thus may have an impact on the output voltage delivered by the sensor. Table 2 Transfer function Pressure Output Voltage @ V DD = VDD,Typ Gain and Offset Symbol Values Unit Symbol Va lues Unit Symbol Value Unit pIN,1 10 kPa VOUT,1 0.40 V a 0.00810 1/kPa pIN,2 115 kPa VOUT,2 4.65 V b -0.00095 – VOUT = VDD x (a x P + b) VOU T[V] pressure [kPa] 0.0 1.0 3.0 2.0 4.0 5.0 30 50 70 90 110 130 150 operating pressure range maximum input pressure range

Data Sheet 7 Revision 1.0 2020-07-08 KP212F1701 Analog Absolute Pressure Sensor Functional Description

1.5 Accuracy

The accuracy of the KP212F1701 sensor is influenced by the supp ly 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.

1.5.1 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. The output voltage VOUT is ratiometric to VDD. VDD must be in the operating range provided in Table 7. Figure 4 Ratiometric error

1.5.2 Overall Accuracy

Overall accuracy covers the entire pressure and temperature ran ge 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 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 ERAT (%) = VOUT(@VDD) - VOUT(@5V) x VDD 5V x 100% -0.5 VDD,MIN VDD 0.5 VDD,MAXVDD,TYP ERAT (%)

Data Sheet 8 Revision 1.0 2020-07-08 KP212F1701 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. Figure 5 Accuracy for pressure acquisition Table 4 Accuracy Temperature [°C] Error [kPa] Error Multiplier -40 ±2.1 1.50 0± 1 . 4 1 . 0 0 85 ±1.4 1.00 125 ±2.1 1.5 -40 0 85 125 error multiplier temperature [°C] absolute error [kPa] 0.0 0.5 1.5 1.0 2.0 2.5 1.4 2.1

Data Sheet 9 Revision 1.0 2020-07-08 KP212F1701 Analog Absolute Pressure Sensor Functional Description

1.6 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). Figure 6 Maximum output voltage limit with pull-down load Figure 7 Minimum output volta ge 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. 4.50 4.60 4.70 4.80 4.90 source current [mA] pull-down resistance [k Ω] 20 10 550 0.1 4.85 VOUT [V] 5.00 0.10 0.20 0.30 0.40 0.50 20 10 550 0.1 source current [mA] pull-up resistance [k Ω] VOUT [V]

Data Sheet 10 Revision 1.0 2020-07-08 KP212F1701 Analog Absolute Pressure Sensor Functional Description

1.7 Timing Properties

The power-up time tUP is defined as the maximum time between the supply voltage reac hing its operating range and the output voltage reaching 90% of its final value (assuming pin VOUT open and constant input pressure). Figure 8 Power-up time Response Time and Stabilization Time The response time tR is defined as the time required by the output to change from 1 0% 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 spec ified accuracy after the pressure has been stabilized (assuming pin VOUT open). Figure 9 Response and stabilization time Note: The values in the diagrams are valid for the entire specified temperature range. 0 2.5 5 7.5 10 12.5 15 time [ms] VOUT 90% of Final Value VDD tUP voltage [V] constant input pressure time [ms] voltage [V] 100 120 pressure [kPa] VOUT 90% of final value input pressure tR 10% of final value tS within required accuracy 13 4 5

Data Sheet 11 Revision 1.0 2020-07-08 KP212F1701 Analog Absolute Pressure Sensor Specification

2 Specification

2.1 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 lo w-pass decoupling filter between the sensor IC output and the A/D input of the microcontroller. The shown application circuit example considers an increased ca ble length between the sensor and the microcontroller. A combined loca t i o n o n a P C B w i t h r e d u c e d d i stance 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). Figure 10 Application circuit example Note: It is recommended to le ave 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 55 9 1 0 0 k Ω Pull-Down Resistor R2 55 9 1 0 0 k Ω Low Pass Resistor R3 3.9 22 100 k Ω Supply Blocking Capacitor C1 10 100 100 nF Output Blocking Capacitor C2 01 0 0 1 0 0 n F Low Pass Capacitor C3 10 100 100 nF Microcontroller ADCRef A/D in GND R3 C3 *) R1 and R2 only alternatively KP 2xx

4 DATA OUT

3 DATA IN

2 CLOCK /

1 Test VDD 5

n.c. n.c. n.c. n.c.

Data Sheet 12 Revision 1.0 2020-07-08 KP212F1701 Analog Absolute Pressure Sensor Specification

2.2 Absolute Maximum Ratings

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. Table 6 Absolute Maximum Ratings Parameter Symbol Values Unit Note or Test Condition Number Min. Typ. Max. Supply voltage VDD_max -0.3 -6.5 1) Reverse polarity; IDD < 300 mA 6.5 16.5 V V V 1 h @ 70°C Limited time: Max. 300 s 1.1 Output voltage V OUT -0.3 – VDD + 0.3 V– 1 . 2 Voltage on CLOCK / VPROG pin VCLK – – 20 V – 1.3 Voltage on DATA IN & DATA_OUT pins VDATA ––5V – 1 . 4 Storage temperature TS -60 – 150 °C – 1.5 Thermal resistance RthJA – – 180 K/W Thermal resistance between the die and ambient; according to JESD51-2 1.6 Maximum input pressure p amb_max 10 – 150 600 kPa kPa Limited time: Max. 300 s 1.7 ESD robustness (HBM: 1.5 kΩ, 100 pF) VESD – – 2 kV According to EIA / JESD22-A114-E 1.8

Data Sheet 13 Revision 1.0 2020-07-08 KP212F1701 Analog Absolute Pressure Sensor Specification

2.3 Operating Range

The following operating conditions must not be exceeded in orde r 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 Unit Note or Test Condition Number Min. Typ. Max. Supply voltage VDD 4.5 5.0 5.5 V VOUT is ratiometric to VDD 2.1 Output current on VOUT pin IOUT – mA mA pull-down resistor used pull-up resistor used 2.2 Operating temperature Ta -40 – 125 °C 2.3 Ambient operating pressure range pamb 10 – 115 kPa 2.4 Lifetime1) 1) The life time shall be considered as anticipation with regard to the product that shall not extend the agreed warranty period. tlive 15 – – years 2.5

Data Sheet 14 Revision 1.0 2020-07-08 KP212F1701 Analog Absolute Pressure Sensor Specification

2.4 Characteristics

Table 8 Electrical Characteristics Parameter Symbol Values Unit Note or Test Condition Number Min. Typ. Max. Output voltage range VOUT_R 0.10 – 4.85 V See also section “Output Voltage versus Load” on Page 9 3.1 Supply current I DD – 8 10 mA During power up a peak supply current of max. 22 mA is possible 3.2 Output referred noise VNOISE – 2.5 1.8 mVRMS mVRMS Frequency > 1 kHz1) Frequency < 1 kHz 1) 200 measurements in sequence, bandwidth limited to 40kHz 3.3 Response time2) 2) More details in section “Timing Properties” on Page 10 tR –0 . 6 5 1 . 0 3) 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 ms 10% to 90% of the final output value 3.4 Stabilization time2) tS – – 10 ms For full accuracy 3.5 Power-up time2) tUP – – 5 ms 90% of the final output value 3.6 Broken wire: Diagnosis response time4) 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 tOBD ––1m s 3 . 7 OBD transistor on resistance RDSON ––1 6 0 Ω 3.8

Data Sheet 15 Revision 1.0 2020-07-08 KP212F1701 Analog Absolute Pressure Sensor Specification Table 9 Transfer Function Parameter Symbol Values Unit Note or Test Condition Number Min. Typ. Max. Sensitivity S –4 0 . 5 –m V /kPa 4.1 Accuracy pressure (overall)1) 1) More details in section “Overall Accuracy” on Page 7 accp -1.4 -2.1 -2.1 1.4 2.1 2.1 kPa kPa kPa 0°C up to 85 °C @ -40°C @ 125°C 4.2 Ratiometric error2) 2) More details in section “Ratiometric Error” on Page 7 ERAT -25 – 25 mV 4.3 Lower clamping level VCl_low –0 . 3 –V 4 . 4 Upper clamping level VCl_high –4 . 8 –V 4 . 5 Clamping level error ΔVCl -30 – 30 mV Accuracy of lower and upper clamping level 4.6

Data Sheet 16 Revision 1.0 2020-07-08 KP212F1701 Analog Absolute Pressure Sensor

Package Information

3 Package Information

For passivation the sensor is covered with a transparent gel. The PG-DSOF-8-16 package is optimized regarding external mechanical stress influences. The package fulfills the solder conditions for lead-free board assembly.

3.1 PG-DSOF-8-16 Outline

OUTER DIMENSIONS DOES NOT INCLUDE PROTUSION OR INTRUSION OF 0.2 MAX. PER SIDE 1) VALID FOR THE WHOLE SEATING PLANE INCLUDED TIE BAR AREA

Data Sheet 17 Revision 1.0 2020-07-08 KP212F1701 Analog Absolute Pressure Sensor Green Product (RoHS compliant) To meet the world-wide customer r equirements for environmentally friendly products and to be compliant with government regulations the device is available as a green produ ct. Green products are RoHS-Compliant (i.e Pb- free finish on leads and suitable for Pb-free soldering according to IPC/JEDEC J-STD-020).

3.2 Identification Code

The identification code is provided in a machine readable format. The date and sales code are provided in human readable format. Figure 12 Identification code The identification code for the KP212F1701 is on the same side of the package as pin 8 (GND). For further information on alternative packages, please visit our website: http://www.infineon.com/packages. Dimensions in mm Data Matrix Code 8 x 18 Dots Dot Size: 0.15 mm x 0.15 mm Date Code Sales Code I BYY W KP212 W Sales Code IIF1701 B: BE Location YY: Year WW: Week

Data Sheet 18 Revision 1.0 2020-07-08 KP212F1701 Analog Absolute Pressure Sensor

Revision history

4 Revision history

1.0 2020-07-08

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