AT2640 High Accuracy Low Power Barometer Module

General Description

The Atmodule AT2640-16A precision digital-output pressure sensor uses smart sensor techniques to correct pressure readings for temperature and linearity, achieving a total error band of under 0.1% FS (0.016 PSI) over the -58 F to +185 F temperature range. The typical error band is 0.05% FS (0.008 PSI) over the -58 F to +185 F temperature range. Static accuracy is better than 0.002 PSI. The module contains an aerospace-grade silicon pressure sensor, sensor interface electronics, a 21-bit A/D converter, EEPROM calibration memory, and a sensor signal processor. Operating from a 3.3 volt supply, the module is designed for board mounting with 8-pin micro header connection. The module is media isolated and compatible with air and oils. The wetted materials are stainless steel and silicon. A parylene conformal coating protects the electronic circuitry.

Features

• Low power device 3.3 volt operation at 2.0 mA
• Media isolation
• 0.10% FS total error over temperature all effects
• Very low long term drift
• Four-wire serial interface. Three-wire user interface
• Pressure measurement range 0 to 16.6 PSIA
• Digital temperature compensation and calibration
• Parylene conformal coating protects circuitry
• 80 mS conversion time
• 1.0 mS data access time
• 0.013% (0.002 PSI) static accuracy
  

Applications

• Barometers and altimeters
• Secondary air data computers
• Smart radios and GPS receivers
• Pressure transmitters

Datasheet

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The Atmos AT2640

A pair of AT2640 Atmodules next
to their big brother, the AT2610