User Manual WSEN-PADS / 2511020213301 (Wurth Elektronik) - 8

1 Introduction
This device is a MEMS based piezo-resistive absolute pressure sensor. The sensor com- prises of a pressure sensing cell and an analog and digital signal processing unit. The integrated ASIC with digital I2C interface provides a digital signal to the host controller. The sensor has an embedded temperature sensor. A 128 level embedded FIFO buffer is avail- able to store the pressure and temperature data. The sensor comes in fully molded holed land grid array package (LGA) having a form factor of 2.0 x 2.0 x 0.8 mm.
1.1 Application
• Altimeters and barometers • Weather stations • GPS navigation enhancement • Indoor navigation • White goods • Wearable devices
1.2 Key features
• Absolute pressure range: 26 to 126 kPa • Output data rate: 1 Hz to 200 Hz • Integrated temperature sensor • Pressure data: 24-bits and temperature data: 16-bits • Low current consumption: 4 µA • Digital interface: I2C • Embedded FIFO buffer: 128 levels • Interrupt pin functionality: data-ready, pressure threshold
1.3 Ordering information
WE order code Temperature range Dimensions Description Tape & reel 2511020213301 -40° C to +85° C 2.0 x 2.0 x 0.8 mm packaging Table 1: Ordering information Absolute pressure sensor, Part Nr. 2511020213301 User manual version 1.0 © June 2019 www.we-online.com/sensors 7 Document Outline Introduction Application Key features Ordering information Block diagram Operational functionality MEMS Cell ASIC Calibration Digital filtering FIFO memory Filtering chain and data path Sensor specifications General information Absolute maximum ratings Pressure sensor specification Temperature sensor specification Electrical specifications Pinning information Pin configuration Pin description Digital interface General characteristics [fig:pinout]SDA and [fig:pinout]SCL logic levels Communication phase Idle state START(S) and STOP(P) condition Data validity Byte format Acknowledge(ACK) and No-Acknowledge(NACK) Slave address for the sensor Read/Write operation I2C timing parameters Application circuit Quick start guide Power-up sequence Communication with host controller Reboot Software reset Sensor operation: single conversion mode Sensor operation: continuous mode Power-off sequence Modes of operation Power-down mode Single conversion mode Continuous mode Additional configurations Low-power or low-noise configuration Enabling additional low-pass filter Reading output data Reading pressure values Reading temperature values Status register for reading the data FIFO buffer Bypass mode FIFO mode Continuous mode Bypass-to-FIFO mode Bypass-to-continuous mode Continuous-to-FIFO mode FIFO status monitoring and control User-defined FIFO threshold Reading data from FIFO buffer Interrupt functionality Interrupt generation on pressure data-ready Interrupt generation based on pressure threshold Interrupt latching FIFO status based interrupt events Routing interrupt events to the [fig:pinout]INT pin Register map Register description INT_CFG (0x0B) THR_P_L (0x0C) THR_P_H (0x0D) INTERFACE_CTRL (0x0E) DEVICE_ID (0x0F) CTRL_1 (0x10) CTRL_2 (0x11) CTRL_3 (0x12) FIFO_CTRL (0x13) FIFO_WTM (0x14) REF_P_L (0x15) REF_P_H (0x16) OPC_L (0x18) OPC_H (0x19) INT_SOURCE (0x24) FIFO_STATUS_1 (0x25) FIFO_STATUS_2 (0x26) STATUS (0x27) DATA_P_XL (0x28) DATA_P_L (0x29) DATA_P_H (0x2A) DATA_T_L (0x2B) DATA_T_H (0x2C) FIFO_DATA_P_XL (0x78) FIFO_DATA_P_L (0x79) FIFO_DATA_P_H (0x7A) FIFO_DATA_T_L (0x7B) FIFO_DATA_T_H (0x7A) Physical dimensions Sensor drawing Footprint Manufacturing information Moisture sensitivity level Soldering Reflow soldering Cleaning and washing Potting and coating Storage conditions Handling Important notes General customer responsibility Customer responsibility related to specific, in particular safety-relevant applications Best care and attention Customer support for product specifications Product improvements Product life cycle Property rights General terms and conditions Legal notice Exclusion of liability Suitability in customer applications Usage restriction License agreement for Würth Elektronik eiSos GmbH & Co. KG sensor product software and source code Limited license Usage and obligations Ownership Disclaimer of warranty Limitation of liability Applicable law and jurisdiction Severability clause Miscellaneous