D IFFERENTIAL P RESSURE S ENSOR WSEN-PDUS U SER MANUAL 25131308 XXX 01 V ERSION 1.
Revision history Manual version 1.0 Notes • Initial release of the manual Differential Pressure Sensor, Part Nr. 25131308xxx01 User manual version 1.0 www.we-online.
Abbreviations Abbreviation Description ASIC Application Specific Integrated Circuit BFSL Best Fit Straight Line ESD Electrostatic Discharge EEPROM Electrically erasable programmable read-only memory FSS Full Scale Span HBM Human Body Model HVAC Heating, ventilation and air conditioning 2 I C Inter Integrated Circuit LCP Liquid-crystal polymers LSB Least Significant Bit MEMS Micro-electro-mechanical system MSB Most Significant Bit PCB Printed Circuit Board Differential Pressure S
Contents 1 Introduction 1.1 Applications . . . . . 1.2 Key features . . . . . 1.3 Ordering information 1.4 Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 5 5 6 7 2 Sensor specifications 2.1 General information . . . . . . . . . . . . 2.2 Media compatibility . . . . . . . . . . . . . 2.3 Absolute maximum ratings . . . . . . . . . 2.
9 Manufacturing information 9.1 Moisture sensitivity level . . . . 9.2 Soldering . . . . . . . . . . . . 9.2.1 Reflow soldering . . . 9.2.2 Cleaning and washing 9.2.3 Potting and coating . . 9.2.4 Storage conditions . . 9.2.5 Handling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 Important notes 10.1 General customer responsibility . . . . . . . . 10.2 Customer responsibility related to specific, in plications . .
1 Introduction The differential pressure sensors from Würth Elektronik eiSos allow measurement of pressure difference between two vertical pressure ports. The sensors consist of a MEMS based piezo-resistive sensing element and an ASIC integrated on a ceramic substrate. On-chip calibration, temperature compensation and signal conditioning provide highly accurate pressure in both digital and analog forms.
1.3 Ordering information WE order code Pressure range [kPa] Marking 2513130810001 ± 0.1 PDB100IA0N 2513130810101 ±1 PDB101IA0N 2513130810201 ± 10 PDB102IA0N 2513130810301 0 to 100 PDU103IA0N 2513130810401 -100 to 1000 PDU104IA0N Dimensions [mm] 13.3 x 8.0 x 7.5 Description Tape & reel packaging Table 1: Ordering information Differential Pressure Sensor, Part Nr. 25131308xxx01 User manual version 1.0 www.we-online.
1.4 Block diagram VDD VDD Internal control registers P Amp Pressure sensing MEMS cell MUX ADC Data registers Control logic & Calibration DAC Digital interface Analog output SDA SCL VOUT EEPROM T Temperature sensor Voltage regulator Oscillator & Clock generator Figure 1: Block diagram MEMS based piezo-resistors embedded on a suspended silicon membrane is the primary sensing element of the device.
2 Sensor specifications 2.1 General information Parameter Value Operating temperature -25 °C up to +85°C Compensated temperature range 1 Storage conditions 0 °C to 70 °C < 40 °C; < 90% RH I2 C, analog Communication interface Moisture sensitivity level (MSL) Electrostatic discharge protection (HBM) 1 2 kV Table 2: General information 2.
2.3 Absolute maximum ratings Absolute maximum ratings are the limits, the device will withstand without permanent damage. Parameter Symbol Part number Input voltage VDD pin VDD_MAX Input voltage SDA, SCL pins VIN_MAX Max 25131308xxx01 -0.3 6.5 V 25131308xxx01 -0.3 5.
2.4 Pressure sensor specifications Unless otherwise stated, all the specified values were measured under the following conditions: T=25°C, VDD =5 V. 2.4.1 Common paramters Following pressure sensor parameters are applicable to part number.: 25131308xxx01 Parameter Symbol Nonlinearity 4 ACCP_NL Test conditions Value Min Typ Max -0.3 ±0.1 0.3 Unit %FSS Resolution (ADC) RESP 15 bit Resolution (DAC) RESP_DAC 11 bit tRESP 2.
Part number: 2513130810101 Symbol Parameter Measurement range Absolute accuracy Total accuracy 5 6 Test conditions PRANGE Value Min Typ Max -1 ACCP_ABS T = 25 °C ACCP_TOT T = 0 to 70 °C Unit 1 kPa -1 ±0.5 1 %FSS -1.25 ±0.75 1.25 %FSS Sensitivity (digital) SENP 7.63 ×10-5 kPa/digit Sensitivity (analog) SENP_AN 0.5 kPa/ V ACCP_REP ±0.05 %FSS ACCP_DRIFT ±0.1 %FSS Repeatability 7 Long term drift Table 7: Pressure sensor specifications (part nr.
Part number: 2513130810301 Symbol Parameter Measurement range Absolute accuracy Total accuracy 5 6 Test conditions PRANGE Value Min Typ 0 Max Unit 100 kPa ACCP_ABS T = 25 °C -0.3 ±0.1 0.3 %FSS ACCP_TOT T = 0 to 70 °C -0.5 ±0.25 0.5 %FSS Sensitivity (digital) SENP 3.815 ×10-3 kPa/digit Sensitivity (analog) SENP_AN 25 kPa/ V ACCP_REP ±0.01 %FSS ACCP_DRIFT ±0.05 %FSS Repeatability 7 Long term drift Table 9: Pressure sensor specifications (part nr.
2.5 Temperature sensor specifications Unless otherwise stated, all the specified values were measured under the following conditions: T=25°C, VDD =5 V. Parameter Symbol Measurement range TRANGE Test conditions Value Min Typ Unit Max 0 70 °C Resolution TRES 15 bits Sensitivity SENT 4.272 ×10-3 °C/digit Table 11: Temperature sensor specifications 2.6 Electrical specifications Unless otherwise stated, all the specified values were measured under the following conditions: T=25°C, VDD = 5V.
3 Pinning information 3.1 Pin configuration SCL 1 8 RSVD SDA 2 7 RSVD GND 3 6 NC VOUT 4 5 VDD Figure 2: Pin specifications (top view) 3.2 Pin description Pin No.
4 Digital interface The sensor supports standard I2 C (Inter-IC) bus protocol. I2 C is a serial 8-bit protocol with two-wire interface that supports communication between different ICs, for example, between microcontrollers and other peripheral devices. Further information about the I2 C interface can be found at https://www.nxp.com/docs/en/user-guide/UM10204.pdf . 4.
4.2 SDA and SCL logic levels The positive supply voltage to which SDA and SCL lines are pulled up (through pull-up resistors), in turn determines the high level input for the slave devices. Input reference levels for this sensor are set as 0.7 * VDD (for logic high) and 0.3 * VDD (for logic low). See figure 4. Voltage VDD 0.7 x VDD high 0.3 x VDD GND low Time Figure 4: SDA and SCL logic levels 4.3 Communication phase 4.3.
4.3.3 Data validity After the start condition, one data bit is transferred with each clock pulse. The transmitted data is only valid when the SDA line data is stable (high or low) during the high period of the clock pulse. High or low state of the data line can only change when clock pulse is in low state. START Condition Valid data Valid change of data STOP Condition SDA SCL Figure 5: Data validity, START and STOP condition 4.3.
4.3.6 Slave address for the sensor The slave address is transmitted after the start condition. Each device on the I2 C bus has a unique address. Master selects the slave by sending corresponding address after the start condition. A slave address is 7 bits long followed by a Read/Write bit. MSB LSB R/W 1 1 1 1 0 0 0 0 = Write 1=Read 7-bit slave address Figure 6: Slave address format 7-bit slave address of this device is 1111000b (0x78). The R/W bit determines the data direction.
4.3.7 Read operation Once the slave-address and data direction bit is sent, the slave acknowledges the master. The slave can then transmit multiple number of data bytes. Each transmitted data byte is followed by an Acknowledgement from the master. If the master no longer wants to receive further data from the slave, it would send No-Acknowledge (NACK). Afterwards, Master can send a STOP condition to terminate the data transfer. START Condition STOP Condition SDA SCL 1...
4.4 I2 C timing parameters Parameter Symbol Min Max Unit fSCL 100 400 kHz LOW period for SCL clock tLOW_SCL 1.3 µs HIGH period for SCL clock tHIGH_SCL 0.6 µs Hold time for START condition tHD_S 0.8 µs Setup time for (repeated) START condition fSCL 1 µs SDA setup time tSU_SDA 0.2 µs SDA data hold time tHD_SDA 0 µs Setup time for STOP condition tSU_P 0.6 µs Bus free time between STOP and START condition tBUF 1.
5 Application circuit VDD Rp Rp 1 SCL RSVD 8 2 SDA RSVD 7 3 GND NC 6 4 VOUT VDD 5 15 nF VDD 220 nF Figure 8: Application circuit with I2 C interface (top view) VDD pin is the central supply pin for the MEMS cell and internal circuits. In order to prevent ripple from the power supply, a decoupling capacitor of 220 nF must be placed as close to the VDD pad of the sensor as possible. Further, a decoupling capacitor of 15 nF should be placed between VOUT and ground.
6 Reading digital output data The sensor generates fully calibrated and temperature compensated digital pressure values which is available for the user to read through host controller. Sensor must be interfaced to the host controller via I2 C interface. For details about I2 C interface, refer to chapter 4. Once the host controller (master) sends the start condition and data direction bit as READ (R/W=1), the sensor starts transmitting the pressure (2 bytes) and temperature (2 bytes) data.
6.
6.2 Temperature output: digital Parameter Symbol Value Min Typ Output at minimum temperature OUTT_MIN 8192 Output at maximum temperature OUTT_MAX 24576 Max Unit digits Table 18: Digital temperature output: all devices Differential Pressure Sensor, Part Nr. 25131308xxx01 User manual version 1.0 www.we-online.
6.3 Interpreting digital pressure values First two bytes transmitted from the sensor consists of pressure data where the first byte being most significant byte (MSB) and the second byte being least significant byte (LSB). The complete 15-bit pressure value can be obtained by concatenating the two bytes of pressure data. Corresponding pressure in SI unit (Pa) can be obtained from the digital pressure values with the help of sensitivity parameter SENP (see section 2.4.2).
6.4 Interpreting digital temperature values Following the pressure data, temperature data is transmitted as a 3rd and 4th byte. The complete 15-bit temperature value can be obtained by concatenating the two bytes of temperature data, where the 3rd byte being most significant byte (MSB) and the 4th byte being least significant byte (LSB) of the temperature value.
7 Reading analog pressure data The sensors also produce fully calibrated pressure values as a ratiometric analog voltage output, which can be read through VOUT pin of the sensor. Following section shows the typical analog voltage values for the sensors at VDD = 5 V. 7.1 Pressure output: analog Part number: 2513130810001, 2513130810101, 2513130810201 Value Parameter Symbol Zero pressure offset OUTOFF 2.5 FSS 4 Output at minimum pressure OUTP_MIN 0.5 Output at maximum pressure OUTP_MAX 4.
Part number: 2513130810401 Value Parameter Symbol Zero pressure offset OUTOFF 0.87 FSS 4 Output at minimum pressure OUTP_MIN 0.5 Output at maximum pressure OUTP_MAX 4.5 Full scale span Min Typ Max Unit digits Table 21: Analog pressure output (part nr.: 2513130810401) Analog output voltage is ratiometric* to the positive supply voltage VDD. * Ratiometric: Output signal changes in proportion to the change in supply voltage. Differential Pressure Sensor, Part Nr.
8 Physical dimensions 6 2 7 1 8 9,208 2,05 O 2,2 1,6 13,308 ±0,2 7,55 ±0,2 3 detail A 0,05 5 4,9 ±0,2 2,05 4 1,524 1,0 4,572 8.1 Sensor drawing A High Pressure Port High Pressure Port 7,0 8,0 3,0 Pin 1 Figure 10: Sensor dimensions [mm] Differential Pressure Sensor, Part Nr. 25131308xxx01 User manual version 1.0 www.we-online.
8.2 Footprint Figure 11: Recommended land pattern [mm] (top view) Open traces, open wires or vias are not allowed in the centre area of the sensor (marked in grey in the figure 11) Differential Pressure Sensor, Part Nr. 25131308xxx01 User manual version 1.0 www.we-online.
8.3 Marking information PD X XXX Pressure Differential Calibration U: Unidirectional B: Bidirectional XX0 X Interface I: I2C A: Analog Pressure measurement range (kPa) 100: -0.1 to 0.1 101: -1 to 1 102: -10 to 10 103: 0 to 100 104: -100 to 1000 Variant N: Normal Figure 12: Marking information Marking PDB101IA0N indicates a differential pressure sensor with measurement range from -1 to 1 kPa. The corresponding WE part number is 2513130810101. Differential Pressure Sensor, Part Nr.
9 Manufacturing information 9.1 Moisture sensitivity level The sensor product is categorized as JEDEC Moisture Sensitivity Level 3 (MSL3), which requires special handling. More information regarding the MSL requirements can be found in the IPC/JEDEC J-STD-020 standard on www.jedec.org. More information about the handling, picking, shipping and the usage of moisture/re-flow and/or process sensitive products can be found in the IPC/JEDEC J-STD-033 standard on www.jedec.org. 9.2 Soldering 9.2.
Package thickness Volume mm3 <350 Volume mm3 350-2000 Volume mm3 >2000 < 1.6mm 260°C 260°C 260°C 1.6mm - 2.5mm 260°C 250°C 245°C > 2.5mm 250°C 245°C 245°C Table 23: Package classification reflow temperature, PB-free assembly, Note: refer to IPC/JEDEC J-STD-020E It is recommended to solder the sensor on the last re-flow cycle of the PCB. For solder paste use a LFM-48W or Indium based SAC 305 alloy (Sn 96.5 / Ag 3.0 / Cu 0.5 / Indium 8.9HF / Type 3 / 89%) type 3 or higher.
9.2.2 Cleaning and washing Do not clean the product. Any residue cannot be easily removed by washing. Use a "no clean" soldering paste and do not clean the board after soldering. • Washing agents used during the production to clean the customer application might damage or change the characteristics of the component. Washing agents may have a negative effect on the long-term functionality of the product. • Using a brush during the cleaning process may damage the component.
• The applicable country regulations and specific environmental regulations must be observed. • Do not disassemble the product. Evidence of tampering will void the warranty. Differential Pressure Sensor, Part Nr. 25131308xxx01 User manual version 1.0 www.we-online.
10 Important notes The following conditions apply to all goods within the sensors product range of Würth Elektronik eiSos GmbH & Co. KG: 10.1 General customer responsibility Some goods within the product range of Würth Elektronik eiSos GmbH & Co. KG contain statements regarding general suitability for certain application areas.
10.5 Product improvements Due to constant product improvement, product specifications may change from time to time. As a standard reporting procedure of the Product Change Notification (PCN) according to the JEDEC-Standard, we inform about major changes. In case of further queries regarding the PCN, the field sales engineer, the internal sales person or the technical support team in charge should be contacted. The basic responsibility of the customer as per section 10.1 and 10.2 remains unaffected.
11 Legal notice 11.1 Exclusion of liability Würth Elektronik eiSos GmbH & Co. KG considers the information in this document to be correct at the time of publication. However, Würth Elektronik eiSos GmbH & Co. KG reserves the right to modify the information such as technical specifications or functions of its products or discontinue the production of these products or the support of one of these products without any written announcement or notification to customers.
informed about the intent of such usage before the design-in stage. In addition, sufficient reliability evaluation checks for safety must be performed on every electronic component, which is used in electrical circuits that require high safety and reliability function or performance. By using Würth Elektronik eiSos GmbH & Co. KG products, the customer agrees to these terms and conditions. Differential Pressure Sensor, Part Nr. 25131308xxx01 User manual version 1.0 www.we-online.
12 License terms for Würth Elektronik eiSos GmbH & Co. KG sensor product software and source code This License terms will take effect upon the purchase and usage of the Würth Elektronik eiSos GmbH & Co. KG sensor products. You hereby agree that this license terms are applicable to the product and the incorporated software, firmware and source codes (collectively, "Software") made available by Würth Elektronik eiSos in any form, including but not limited to binary, executable or source code form.
use in areas such as military, aerospace, aviation, nuclear control, submarine, transportation (automotive control, train control, ship control), transportation signal, disaster prevention, medical, public information network etc. You shall inform Würth Elektronik eiSos about the intent of such usage before design-in stage.
resolved and finally settled by the court competent for the location of Würth Elektronik eiSos registered office. 12.7 Severability clause If a provision of this license terms are or becomes invalid, unenforceable or null and void, this shall not affect the remaining provisions of the terms. The parties shall replace any such provisions with new valid provisions that most closely approximate the purpose of the terms. 12.
List of Figures 1 2 3 4 5 6 7 8 9 10 11 12 13 Block diagram . . . . . . . . . . . . . . . . . . Pin specifications (top view) . . . . . . . . . . Master-slave concept . . . . . . . . . . . . . SDA and SCL logic levels . . . . . . . . . . . Data validity, START and STOP condition . . Slave address format . . . . . . . . . . . . . . Complete data transfer . . . . . . . . . . . . . Application circuit with I2 C interface (top view) Reading output data with I2 C interface . . . . Sensor dimensions [mm] . . . .
more than you expect Internet of Things Contact: Würth Elektronik eiSos GmbH & Co. KG Division Wireless Connectivity & Sensors Rudi-Schillings-Str. 31 54296 Trier Germany Tel.: +49 651 99355-0 Fax.: +49 651 99355-69 www.we-online.
