Compact barometric pressure sensor for smart electronics from TE

• 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 includes a high-linearity MEMS pressure sensing element and an ultra-low power 24-bit ΔΣ ADC. Every sensor is individually factory-calibrated at two temperatures and two pressures. 

“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:

1. Atmospheric pressure
2. Stainless steel lid
3. Protective gel transfers force to MEMS sensor
4. The opaque silicone gel ensures watertightness, protection of the sensor from damage and light
5. MEMS sensor generates an electrical signal proportional to the applied force
6. The signal is processed and digitized by ASIC
7. 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 our sales representative for your region or send us an email to te connectivity@soselectronic.com; we will be happy to advise you and help you find a suitable solution.