Barometer 5 Click is a compact add-on board used to measure air pressure in a specific environment. This board features the MS5637-02BA03, a high accuracy low voltage barometric and temperature sensor from TE Connectivity Measurement Specialties. The MS5637-02BA03 includes a high-linearity pressure sensor and an ultra-low-power 24-bit ΔΣ ADC with internal factory-calibrated coefficients, providing a precise digital 24-bit pressure and temperature value, and different operation modes allowing the user to optimize for conversion speed and current consumption. It comes with a configurable host interface that supports I2C serial communication and measures pressure in a range from 300mbar up to 1.2bar with an accuracy of ±2mbar over a wide operating temperature range. This Click board™ is suited for various pressure-based applications, especially when low power consumption is required.

Barometer 5 Click is supported by a mikroSDK compliant library, which includes functions that simplify software development.

Barometer 5 Click as its foundation uses the MS5637-02BA03, a high accuracy low voltage barometric and temperature sensor from TE Connectivity Measurement Specialties, to measure air pressure in a specific environment. This new sensor module generation is based on leading MEMS technology, where the sensing principle leads to very low hysteresis and high stability of both pressure and temperature signal. It consists of a piezoresistive sensor and a sensor interface integrated circuit. The primary function of the MS5637-02BA03 is to convert and provide the uncompensated analog output voltage from the piezoresistive pressure sensor to a 24-bit digital value for the temperature of the sensor. It can measure pressure in a range from 300mbar up to 1.2bar with an accuracy of ±2mbar over a wide operating temperature range at the industry’s lowest power.

As mentioned before, the MS5637-02BA03 has integrated ultra-low-power 24-bit ΔΣ ADC with internal factory-calibrated coefficients, which alongside precise pressure value, also provides temperature value. A high-resolution temperature output allows the implementation of an altimeter/thermometer function without any additional sensor, with an altitude resolution at sea level of 13cm of air.

Barometer 5 Click communicates with MCU using the standard I2C 2-Wire interface to read data and configure settings, supporting Standard Mode operation with a clock frequency of 100kHz and Fast Mode up to 400kHz. Besides, it also offers different operation modes allowing the user to optimize for conversion speed and current consumption.

Suppose the user decides not to use our compliant library but to do software development independently. In that case, it is recommended to compensate for the non-linearity over the temperature to obtain the best accuracy over the temperature range, particularly at low temperatures. This can be achieved by correcting the calculated temperature, offset, and sensitivity by a second-order correction factor.

This Click board™ can be operated only with a 3.3V logic voltage level. The board must perform appropriate logic voltage level conversion before using MCUs with different logic levels. However, the Click board™ comes equipped with a library containing functions and an example code that can be used, as a reference, for further development.

• Interface: I²C
• Compatibility: mikroBUS™
• Dimensions: 28.6 x 25.4mm
• Input Voltage: 3.3V
• Supply Voltage: Min. 3.3V, Max. 5V
• Operating Pressure Range: Min. 300 mbar, Max. 1200 mbar
• Accuracy: ±2 mbar
• ADC Resolution: 24 bit
• Operating Temperature Range: Min. -40°Cm Typ. +25°C, Max. +85°C

• Schematic
• MS5637-02BA03 Datasheet
• mikroSDK
• GitHub