The XENSIV DPS368 is a high-performance digital barometric pressure sensor designed to meet the growing demand for accurate sensing in space-constrained and harsh environments. This article will discuss the DPS368 overview, pinout, functional block diagram, technical specifications, features, application circuits, comparisons, and more.

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XENSIV DPS368 Overview

The XENSIV DPS368 is an ultra-small digital barometric pressure sensor developed by Infineon Technologies for accurate pressure and temperature measurement in compact and demanding environments. It features a waterproof and dust-resistant package, making it suitable for applications exposed to moisture, humidity, or harsh conditions.

This sensor operates over a pressure range of 300 hPa to 1200 hPa and delivers high-resolution 24-bit digital output. With excellent relative accuracy, it enables precise altitude detection, airflow monitoring, and environmental sensing. The DPS368 supports both I²C and SPI interfaces, allowing easy integration with common microcontrollers.

If you are interested in purchasing the XENSIV DPS368, feel free to contact us for pricing and availability.

DPS368 Pressure Sensor CAD Models

DPS368 Sensor Pinout Details

Alternatives & Equivalent Model

• Bosch BMP280

• Bosch BME280

• Bosch BME388

• Bosch BMP180

• ST LPS33HW

• ST LPS22DB

• MEAS/TE MS5611

• TE LPS25H

• NXP MPXHZ6008A

Functional Block Diagram

The functional block diagram of the XENSIV DPS368 shows how pressure and temperature data move through the sensor from measurement to digital output. At the sensing stage, the device uses a capacitive pressure sensor to detect air pressure changes and a separate temperature sensor to monitor ambient temperature. These two signals are essential because temperature data is later used to compensate and correct pressure measurements for higher accuracy.

Both sensor signals are routed through a multiplexer (MUX), which selects whether pressure or temperature data is processed at a given time. The selected analog signal is then converted into a digital format by the ADC (Analog-to-Digital Converter). This conversion allows the sensor to work with high-resolution digital data suitable for precise calculations and low-noise performance.

After conversion, the data enters the digital signal processing stage, where factory-stored calibration coefficients are applied. This step corrects raw sensor data and ensures consistent accuracy across operating conditions. Processed results can be temporarily stored in the FIFO memory, enabling efficient data handling at higher sampling rates. Finally, the digital core sends the calibrated data through the I²C or SPI interface, while integrated voltage regulators manage power supplied via VDD and VDDIO for stable operation.

DPS368 Technical Specifications

DPS368 Sensor Features

• Environmentally resistant pressure sensor package

• Wide operating pressure range (300–1200 hPa)

• Wide operating temperature range (−40 to +85 °C)

• High pressure precision (up to ±0.002 hPa in high-precision mode)

• High relative pressure accuracy (±0.06 hPa)

• Absolute pressure accuracy (±1 hPa)

• IPx8 waterproof certification (up to 50 m water immersion for 1 hour)

• Integrated temperature sensor

• Temperature accuracy of ±0.5 °C

• Low pressure temperature sensitivity (0.5 Pa/K)

• Selectable measurement modes (low power, standard, high precision)

• Fast pressure and temperature measurement times

• Ultra-low average current consumption

• Very low standby current

• Dual power supply support (VDD and VDDIO)

• Flexible operating modes (command, background, standby)

• Factory calibration with stored compensation coefficients

• Integrated FIFO buffer (up to 32 samples)

• Interrupt support for event-driven operation

• I²C and SPI digital interfaces

• High-speed interface support (up to 3.4 MHz I²C, 10 MHz SPI)

• High measurement rate capability (up to 128 Hz)

• On-chip digital signal processing

• Integrated voltage regulators

• Excellent long-term stability

• High resistance to solder-induced drift

• Robust ESD protection (±2 kV HBM)

• Compact 8-pin PG-VLGA package (2.0 × 2.5 × 1.1 mm)

• RoHS compliant and environmentally friendly design

DPS368 Sensor Application Circuit

XENSIV DPS368 Sensor using I²C Interface Application Circuit

In the I²C configuration, the DPS368 communicates with the processor using the SDA (data) and SCK (clock) lines. Pull-up resistors are connected to VDDIO to ensure proper logic levels on the I²C bus. The CSB pin is not used for chip selection in this mode and can be left unconnected or tied to VDDIO. An optional interrupt line can be connected from the SDO pin to the processor, allowing the sensor to signal when new measurement data is available. Separate supply pins are used for analog (VDD) and digital I/O (VDDIO), each stabilized with decoupling capacitors for reliable operation.

DPS368 Sensor using SPI 4-Wire Interface Application Circuit

In the SPI 4-wire setup, the DPS368 uses dedicated lines for clock (SCK), data input (SDI/MOSI), data output (SDO/MISO), and chip select (CSB). This configuration allows full-duplex communication, meaning data can be sent and received simultaneously. The CSB pin actively selects the sensor during communication, ensuring stable and fast data transfer. This mode is ideal for systems that require higher speed and clear signal separation. As with all configurations, VDD and VDDIO are powered independently and filtered using external capacitors.

DPS368 Sensor using SPI 3-Wire Interface Application Circuit

In the SPI 3-wire configuration, the DPS368 reduces pin usage by combining data input and output on a single bidirectional SDI line. The processor controls the direction of this data line during communication. The SDO pin is not used in this mode, while CSB and SCK still manage device selection and timing. This setup is useful in space-constrained designs where fewer signal lines are preferred, while still maintaining SPI reliability and performance.

DPS368 Sensor using SPI 3-Wire with Interrupt Interface Application Circuit

This configuration builds on the SPI 3-wire mode by enabling the interrupt function. The SDO pin is repurposed as an interrupt output, allowing the DPS368 to notify the processor when a measurement is complete or when FIFO data is ready. This event-driven approach reduces processor polling and lowers overall power consumption. It is especially beneficial in low-power and real-time applications where efficient data handling is critical.