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It is optimized for depth meters and altimeters with an altitude resolution of 30 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 MS5803-05BA can be interfaced  to  virtually  any  microcontroller.  The  communication protocol  is  simple,  without  the  need  of  programming  internal registers  in  the  device.  The  gel  protection  and  antimagnetic stainless steel cap allows the use  in 100m waterproof watches. This new sensor module generation is based on leading MEMS technology  and  latest  benefits  from  MEAS  Switzerland  proven experience  and  know-how  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


  • High resolution module, 30cm 
  • Fast conversion down to 1 ms 
  • Low power, 1 µA (standby < 0.15 µA)
  • Integrated digital pressure sensor (24 bit ΔΣ ADC)  
  • Supply voltage 1.8 to 3.6 V 
  • Operating range: 0 to 5 bar, -40 to +85 °C
  • I2C and SPI interface (Mode 0,3) 
  • No external components (Internal oscillator) 
  • Excellent long term stability 
  • Hermetically sealable for outdoor devices


Please review product documents or contact us for the latest agency approval information.  

Product Type Features

  • Sensor Type  Digital Pressure and Altimeter Sensor Modules

  • Type  Absolute

Electrical Characteristics

  • Supply Voltage (V) 1.8 – 3.6


  • Dimensions 6.2 x 6.4 mm [ .24 x .25 in ]

Usage Conditions

  • Operating Temperature -40 – 85 °C [ -40 – 185 °F ]


  • Output Interface  I²C and SPI (Mode 0, 3)

  • Overpressure  30 bar

  • Pressure (mbar) 5000

  • Output/Span  24 bit ADC

  • Accuracy  ±120mbar

  • Resolution  .036

Packaging Features

  • Package  Surface Mountable

Related Materials

Catalog Pages/Data Sheets

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