Absolute pressure sensor MS5803 by AMSYS

Absolute pressure sensor MS5803

The MS5803-xxBA is a new generation of high resolution sensors with SPI & I²C interface. The sensor module includes a high linearity pressure sensor with an ultra low power 24 bit ADC with internal factory calibrated coefficients. It provides precise digital 24 bit pressure and temperature values 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 an additional sensor. Gel protection and an antimagnetic stainless steel cap allow the use in 100m waterproof altimeter/compass watches.

The MS5803 is available in the following pressure ranges:

MS5803-01BA: 10-1300mbar
MS5803-01BA07: 10-1300 mbar for harsh environments
MS5803-02BA: 300-2000mbar
MS5803-05BA: 0-6bar
MS5803-07BA: 0-7bar (not for new designs)
MS5803-14BA: 0-14bar
MS5803-30BA: 0-30bar

*Modules are pressure sensors, whose output signals have to be calculated by an external microprocessor.

Accessories for the MS5803

Also available are sample boards, which can be used together with the USB Development Kit to quickly evaluate the sensors and build prototypes, as well as light and dust protection caps.


  • Pressure ranges from 1 to 30 bar
  • Supply voltage 1.8 – 3.6 V
  • Temperature range: -40°C – 85 °C
  • Resolution pressure: 0.012 mbar (MS5803-01BA)
  • Resolution temperature: <0.01 °C
  • I²C and SPI interface up to 20 MHz
  • Fast conversion under 1ms (adjustable)
  • Low power consumption, 1 μA (standby <0.15 μA)
  • Suitable for outdoor applications
  • ESD protected
  • Small size: 6.2 × 6.4 mm
  • Excellent long-term stability
  • RoHS and REACH compliant


  • Mobile altimeters and mobile barometric measuring systems
  • People search and navigation devices
  • Weather stations
  • Sports watches
  • GPS receiver
  • Air traffic control (Variometer)
  • Pneumatic applications
  • Mobile water depth gauges
  • Dive computers and diver watches

For information on prices and delivery times or if you have any technical questions, please contact info@amsys-sensor.com.