Diving computers and divers watches use gigital water pressure sensor MS5535

  14 bar Pressure Sensor - MS5535C   Applications: Mobile water depth measurement systems, Diving computers and divers watches   Description:  (1)The MS5535C is a SMD-hybrid device including a piezoresistive pressure sensor and an ADC-Interface IC. (2)It provides a 16-bit data word from a pressure and temperature dependent voltage. Additionally the module contains 6 readable coefficients for a highly accurate software calibration of the sensor. (3)MS5535C is a low power, low voltage device with automatic power down (ON/OFF) switching. (4)A 3-wire interface is used for all communications with a microcontroller. (5)The MS5535C is fully software compatible to the previous versions (MS5535A and MS5535B). Compared to the previous versions, the ESD sensitivity has been improved to 4kV on all pins. Features:
• Integrated pressure sensor (9x9 mm) 
• Pressure range 0-14 bar (200 PSI) 
• 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..+125°C 
• Low voltage (2.2 to 3.6V) 
• Low power (Standby current: 0.1uA) 
• Pb-free and RoHS-compatible 
• Soldering profile: 240-250°C 
• Low supply current 
• No external components required