Product Descriptions

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. A high resolution temperature output allows the implementation of an altimeter/thermometer function 

without any additional sensor.

The MS5611-01BA can be interfaced to virtually any microcontroller. The communication protocol is simple, without the need of programming 

internal registers in the device. Small dimensions of only 5.0 mm x 3.0 mm and a height of only 1.0 mm allow for integration in mobile devices. 

This new sensor module generation is based on leading MEMS technology and latest benefits from MEAS Switzerland proven experience and 

knowhow in high volume manufacturing of altimeter modules, which have been widely used for over a decade. The sensing principle employed 

leads to very low hysteresis and high stability of both pressure and temperature signal. 

Product Specifications

 High resolution module, 10 cm

 Fast conversion down to 1 ms

 Low power, 1 µA (standby < 0.15 µA)

 QFN package 5.0 x 3.0 x 1.0 mm3

 Supply voltage 1.8 to 3.6 V

 Integrated digital pressure sensor (24 bit ΔΣ ADC)

 Operating range: 10 to 1200 mbar, -40 to +85 °C

 I2C and SPI interface up to 20 MHz

 No external components (Internal oscillator)

 Excellent long-term stability

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