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Pressure Sensors
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Pressure Sensors  
…Ő∆∑√Ż≥∆£ļMEMS miniature, low-power water pressure sensor MS5540

MEMS miniature, low-power water pressure sensor MS5540



Product introduction£ļ

MEMS miniature, low-power water pressure sensor MS5540

MS5540B (RoHS*) MINIATURE BAROMETER MODULE
°§ 10 - 1100 mbar absolute pressure range
°§ 6 coefficients for software compensation stored
on-chip
°§ Piezoresistive silicon micromachined sensor
°§ Integrated miniature pressure sensor 6.2 x 6.4 mm
°§ 15 Bit ADC
°§ 3-wire serial interface
°§ 1 system clock line (32.768 kHz)
°§ Low voltage and low power consumption
°§ RoHS-compatible & Pb-free*
DESCRIPTION
The MS5540B is a SMD-hybrid device including a precision piezoresistive pressure sensor and an ADCInterface
IC. It is a miniature version of the MS5534B barometer/altimeter module and provides a 16 Bit data
word from a pressure and temperature dependent voltage. MS5540B is a low power, low voltage device with
automatic power down (ON/OFF) switching. A 3-wire interface is used for all communications with a microcontroller.
Compared to MS5534A the pressure range (measurement down to 10 mbar) has been improved. Other
improvements concern the ESD sensitivity, current consumption and converter accuracy. The MS5540B is fully
software compatible to the MS5534A and MS5534B. In addition, the MS5540B is from its outer dimensions
compatible to the MS54XX series of pressure sensors. The gel protection of the sensor provides a water
protection sufficient for 100 m waterproof watches without any additional protection.
FEATURES APPLICATIONS
°§ Resolution 0.1 mbar °§ Mobile altimeter/barometer systems
°§ Supply voltage 2.2 V to 3.6 V °§ Weather control systems
°§ Low supply current < 5 uA °§ Adventure or multi-mode watches
°§ Standby current < 0.1 uA °§ GPS receivers
°§ -40°„C to +85°„C operation temperature
°§ No external components required

 
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