The MS5611-01BA is a new generation of high resolution altimeter sensors from MEAS Switzerland with SPI and I2C bus interface.

This barometric pressure sensor is optimized for altimeters and variometers with an altitude resolution of 10 cm. The sensor module includes a high linearity pressure sensor and an ultra-low power 24 bit ΔΣ ADC with internal factory calibrated coefficients. It provides a precise digital 24 Bit pressure and temperature value and different operation modes that allow the user to optimize for conversion speed and current consumption.

Technical Specifications

ItemItem MS5611-01BA03
Power Input TypeMolex 4 pin 2.50mm header
Voltage Supply 3.3V to 5.5V
FunctionsI2C Barometric pressure sensor
Operating Temperature-40°C to +85°C
Board Dimensions 20 x 20 mm

Board Spesific Properties

  • It can work with 3.3V or 5V.
  • It easily communicates with an MCU with TTL I2C outputs.
  • CSB, SDO, and PS pins are work with 3.3V.
  • This board default works I2C, you can set SPI mode with PS pin. (You can see more info in MS5611-01BA03 Datasheet.)

Board Pinout

PIN NumberPIN NameDescription
1VCCPower Supply
2SCLI2C Serial Clock Pin.
3SDAI2C Serial Data Pin.
PIN NumberPIN NameDescription
1CSBChip select (active low), internal connection
2SDOSerial data output
3PSProtocol select PS high (VDD) = I2C PS low (GND) = SPI