325540009-00 TE Connectivity

MS5540C Miniature Barometer Module The MS5540C is a SMD-hybrid device including a precision piezoresistive pressure sensor and an ADC-Interface IC. The MS5540C HE is the high endurance version of MS5540C sensor. It is a miniature version of the MS5534C barometer/altimeter module and provides a 16 Bit data word from a pressure and temperature dependent voltage. MS5540C 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 micro- controller. FEATURES Compared to MS5534A the pressure range (measurement down 10 - 1100 mbar absolute pressure range to 10 mbar) has been improved. The MS5540C is fully software 6 coefficients for software compensation stored on- compatible to the MS5534C and previous versions of MS5540. In chip addition, the MS5540C is from its outer dimensions compatible to the MS54XX series of pressure sensors. Compared to the Piezoresistive silicon micromachined sensor previous version the ESD sensitivity level has been improved to Integrated miniature pressure sensor 6.2 x 6.4 mm 4kV on all pins. The gel protection of the sensor provides a water 16 Bit ADC protection sufficient for 100 m waterproof watches without any 3-wire serial interface additional protection. 1 system clock line (32.768 kHz) Low voltage and low power consumption High Endurance (HE version) APPLICATIONS Mobile altimeter / barometer systems Weather control systems Adventure or multi-mode watches GPS receivers High endurance pad technology (HE version) SENSOR SOLUTIONS ///MS5540C Page 1 06/2017 MS5540C Miniature Barometer Module TECHNICAL DATA Sensor Performances (V = 3 V) DD Pressure Min Typ Max Unit Range 10 1100 mbar ADC 16 bit Resolution 0.1 mbar Accuracy 0C to +50C, -1 +1 mbar 300 to 1000 mbar Accuracy -40C to +85C -2 +5 mbar 300 to 1000 mbar Response time 35 ms Long term stability -1 mbar/yr Temperature Min Typ Max Unit Range -40 +85 C Resolution 0.005 0.015 C Accuracy -0.8 +0.8 C FUNCTIONAL BLOCK DIAGRAM VDD MCLK Input MUX +IN Digital SENSOR DIN Interface DOUT dig. ADC -IN Filter SCLK Memory Sensor (PROM) Interface IC 64 bits SGND GND 08/2017 SENSOR SOLUTIONS ///MS5540C Page 2