The MS5840-02BA has been released on the market by TE Connectivity. Due to its incredibly small size, this gel-filled digital pressure and temperature sensor are perfect for small mobile devices and smart electronics. (2.5-minute reading)
PAVOL BUHLA SOS electronic Product Specialist More articles from the author
The pressure and temperature sensor MS5840-02BA21’s major benefits are:
- Ultra-compact design (3.3 x 3.3 x 1.7mm)
- 24-bit ΔΣ ADC
- Silicone gel ensures water resistance and protection against light
- Includes MEMS sensing element
- Factory calibrated sensor module
The demand for high performance and precision sensor components in applications with very small or limited space is now steadily increasing, which is why TE Connectivity (TE) has designed the MS5840-02BA sensor module with one of the lowest profiles on the market (3.3 x 3.3 x 1.7mm). This water-resistant pressure and temperature sensor thus enables integration into a variety of mobile devices.
Individual Factory Calibration and Serial I2C Interface
The sensor consists of a high-linearity MEMS pressure sensing component and a 24-bit ADC with extremely low power consumption. Each sensor is independently calibrated in the factory at two different pressures and temperatures.
“Sensor supports different operation modes that allow the user to optimize for conversion speed and current consumption. A high-resolution temperature output allows the implementation of an altimeter/thermometer function without any additional sensor. Small dimensions of only 3.3 x 3.3 x 1.7mm allow integration in mobile and wearable devices.” says Miroslav Piskor, Product Specialist at SOS electronic.
The MS5840 provides measured values through I2C-bus. The communication protocol is simple, without the need of programming internal registers. To speed up the development, you can start with a freely available Arduino library.
Internal Structure of MS5840-02BA21
As per the following picture:
- Atmospheric pressure
- Stainless steel lid
- Protective gel transfers force to MEMS sensor
- The opaque silicone gel ensures watertightness, protection of the sensor from damage and light
- MEMS sensor generates an electrical signal proportional to the applied force
- The signal is processed and digitized by ASIC
- PCB on alumina substrate. I2C bus, VDD and GND pads are on the bottom side of PCB
Applications of Use
- Drones
- Bike Computers
- Fitness Trackers
- Mobile Altimeters
- Multisport Watches
- Personal Navigation Devices
Features
- Ceramic and metal package: 3.3 x 3.3 x 1.7mm
- High resolution: 13cm
- Supply voltage: 1.5 to 3.6V
- Fast conversion down to 0.5ms
- Low current consumption, 0.6μA (standby ≤ 0.1 μA at 25°C)
- 24-bit ΔΣ ADC
- Operating range: 300 to 1200mbar, -20 to +85°C
- I2C interface
- No external components (internal oscillator)
- Chlorine resistant variant: MS5840-02BA36 (20000982-00)
For more information about TE connectivity products, please contact sales representative’s of SOS electronic for your region or send an email to [email protected].
