BMP180 Digital Barometric Pressure Sensor Module – High-Precision Altitude and Temperature Sensor with I2C Interface for Arduino

Product Description The BMP180 is a high-precision, digital barometric pressure sensor designed for advanced environmental monitoring and altitude tracking. As the functional successor to the BMP085, it offers ultra-low power consumption and a significantly smaller footprint, making it ideal for mobile devices and portable weather stations. The module utilizes piezo-resistive technology to measure atmospheric pressure and includes an integrated temperature sensor for real-time compensation. Capable of measuring altitude with a resolution of up to 17cm, it is a staple for Arduino-based flight controllers, indoor navigation systems, and localized weather forecasting. Its simple I2C interface allows for seamless data retrieval with minimal wiring.

Key Features

• High-Precision Altitude Tracking: Provides vertical resolution down to 0.17 meters, perfect for stair-climbing detection and drone stabilization.

• Ultra-Low Power Consumption: Optimized for battery efficiency, drawing as little as 3 µA in low-power modes.

• Fully Calibrated Output: Every sensor is factory-calibrated with internal compensation coefficients stored in EPROM for high accuracy.

• Integrated Temperature Sensor: Provides ambient temperature data required for pressure refinement and general environmental tracking.

• Wide Compatibility: The breakout module includes an on-board 3.3V regulator, allowing it to interface safely with both 3.3V and 5V microcontrollers.

Technical Details

• Sensing Architecture: Based on Bosch Sensortec’s proprietary piezo-resistive MEMS technology for high EMC robustness.

• Pressure Resolution: Features a noise floor as low as 0.02 hPa in ultra-high-resolution mode.

• Digital Interface: Communicates via a standard I2C bus, supporting clock speeds up to 3.4 MHz for rapid data acquisition.

• Conversion Time: Rapid response with a maximum conversion time of 4.5ms to 76ms depending on the oversampling setting.

• Absolute Accuracy: Maintains a high absolute accuracy of ±1.0 hPa over a wide temperature range of 0°C to +65°C.

• Voltage Input: While the chip operates at 1.8V-3.6V, the module VCC pin typically accepts 3.3V to 5V DC.

• Data Packet Format: Outputs 16-bit to 19-bit pressure data and 16-bit temperature data via I2C registers.

• Altitude Calculation: Uses the international barometric formula to derive height based on sea-level pressure (QNH).

• Sampling Flexibility: Supports four distinct operating modes: Low Power, Standard, High Resolution, and Ultra High Resolution.

• Hardware Robustness: Features high-quality gold-plated PCB pads for low contact resistance and long-term signal integrity.

• Miniature Footprint: One of the smallest barometric sensors available, suitable for integration into wearable IoT devices.

• Lead-Free Construction: Fully RoHS compliant and halogen-free for environmentally friendly electronic assemblies.

• Pin Configuration: Standard 4-pin breakout: VCC, GND, SCL, and SDA.

• Logic Levels: I2C lines are compatible with the supplied VCC, though 3.3V logic is native to the sensor.

• Thermal Drift: Optimized to minimize temperature-induced pressure drift, ensuring stable readings in varying climates.