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MS5540C Digital Pressure & Altimeter Sensor
Brand: American Sensor Technologies IncThe 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 micro-controller.
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 meters waterproof watches without any additional protection.
Features- Resolution 0.1 mbar
- Supply voltage 2.2 V to 3.6 V
- Low supply current < 5 µA
- Standby current < 0.1 µA
- -40°C to +85°C operation temperature
- No external components required
Specifications
Accuracy
- ± 0.5 Mbar at 25° C (77° F) - Relative Pressure Accuracy
- ± 0.8° C (± 1.4° F) at 20° C (68° F)
- ± 1.5 Mbar at 25° C (77° F) - Absolute Pressure Accuracy
Ambient Temperature Range
- 25° C (77° F)
Approvals & Certifications
- RoHS
Communication
- 16-bit - Analog to Digital Converter
Consumption
- 0.5 µA - Current Consumption Into MCLK
Duty Cycle
- 40 to 60 % - Duty Cycle of MCLK
Frequency
- 30 to 500 KiloHertz - External & Serial Data Clock (MCLK & SCLK)
Input
- 0-20 % Vdd - Input & Output Low Voltage
- 80-100 % Vdd - Input & Output High Voltage
Interface Connection
- 3-Wire Serial Interface
Media
- Non-Corrosive Dry Gases
Operating Temperature - Sensor
- -40° to 85° C (-40° to 185° F)
Output
- 0.1 µA - Supply Current (Standby or No Conversion)
- 1 mA - Typical Supply Current (During Conversion)
- 4 µA - Typical Supply Current (Average)
Overpressure & Static Pressure Limits
- psi: 145 (kPa: 1,000, bar: 10) - Max.
Pressure Range
- bar: 00.01 to 01.1
- kPa: 01 to 110
- mbar: 10 to 1,100
- psi: 00.145 to 15.95
Pressure Type
- Absolute
Resolution
- 0.005° to 0.015° C
- 0.1 Mbar
- 16-bits
Sensitivity
- 4 kV - ESD Sensitivity
Sensor, Probe Material
- Silicon - Piezoresistive
Sensor, Probe Type
- Pressure Sensor - Integrated Miniature
Stability
- -1 Mbar Per Year - Long Term Stability
Storage Temperature
- -40° to 85° C (-40° to 185° F)
Supply Voltage
- 2.2-3.6 V
Update Time
- 35 ms - Conversion Time
- Mobile Altimeter / Barometer Systems
- Weather control systems
- Adventure or Multi-mode Watches
- GPS Receivers
