MS5540

MS5540是MS5534气压计/高度计模块的微型版本，并且依靠电压提供了16位的的压力和温度参数。MS5540是低电压，低功耗的器件，且带自动断电开关。3线接口则可满足与微处理器的各种通讯。其他改善包括ESD敏感性、当前消耗和交换器准确性。MS5540C软件兼容MS5534A、MS5534B、MS5534C、MS5540A、MS5540B。除此之外MS5540C是从它的外维尺度兼容到压力传感器MS54xx系列。传感器的胶防护在没有任何其他的防护下对在100米水深的防水手表有足够的保护。

Features

• Integrated pressure sensor
• Small size 6.2×6.4 mm
• Pressure range 10-1100 mbar
• Resolution 0.1 mbar
• 16 Bit ADC
• 6 coefficients for a software compensation stored on-chip
• 3-wire serial interface
• 1 system clock line (32.768 kHz)
• Temperature range -40..+85°C
• Low voltage (2.2 to 3.6 V)
• Low power (Standby current: 0.1 uA)
• Pb-free & RoHS-compatible
• No external components required

Applications

• Mobile altimeter/barometer systems
• Weather control systems
• Adventure or multi-mode watches
• GPS receivers

Description

The MS5540C is a SMD-hybrid device including a precision piezoresistive pressure sensor and an ADC Interface IC. 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 microcontroller. Compared to MS5534A the pressure range (measurement down to 10 mbar) has been improved. The MS5540C is fully software compatible to the MS5534C and previous versions of MS5540. In addition, the MS5540C is from its outer dimensions compatible to the MS54XX series of pressure sensors. Compared to the previous version the ESD sensitivity level has been improved to 4 kV on all pins. The gel protection of the sensor provides a water protection sufficient for 100 m waterproof watches without any additional protection.