MS5541-CM Measurement Specialties Inc., MS5541-CM Datasheet
MS5541-CM
Specifications of MS5541-CM
Related parts for MS5541-CM
MS5541-CM Summary of contents
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... MS5535C. Compared to the previous version the ESD sensitivity has been improved to 4kV on all pins. In addition to this the MS5541C is from its outer dimensions compatible to the MS54xx series of pressure sensors. It uses an antimagnetic polished stainless steel ring for sealing with O-ring. The sensor provides 15 Bit pressure and temperature data via a 3 wire serial interface that can be easily interfaced with 4 Bit low power microcontrollers ...
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... Symbol Supply Voltage Storage Temperature Overpressure NOTES 1) Storage and operation in an environment of dry and non-corrosive gases. 2) The MS5541CM is qualified referring to the ISO 6425 standard and can withstand an absolute pressure of 30 bar in salt water. DA5541C_001.doc 000055411194 ECN1037 Fig. 2: Pin configuration of MS5541C Type ...
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... During conversion the sensor will be switched on and off in order to reduce power consumption; the total on time within a conversion is about 2ms. 3) This value can be reduced by switching off MCLK while MS5541C is in standby mode strongly recommended that a crystal oscillator be used because the device is sensitive to clock jitter. A square-wave form of the clock signal is a must ...
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ELECTRICAL CHARACTERISTICS DIGITAL INPUTS Parameter Symbol Input High Voltage V IH Input Low Voltage V IL Signal Rise Time t R Signal Fall Time t f DIGITAL OUTPUTS Parameter Symbol Output High Voltage V OH Output Low Voltage V OL ...
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... PRESSURE OUTPUT CHARACTERISTICS With the calibration data stored in the interface IC of the MS5541C the following characteristics can be achieved: Parameter Resolution Absolute Pressure Accuracy (Temperature range 0 .. +40 ° C) Absolute Pressure Accuracy (Temperature range -40 .. +85 ° C) Error over Temperature (p = const. relative to 20° C) ...
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... DA5541C_001.doc 000055411194 ECN1037 ADC-value D1 vs Pressure (typical) 6000 8000 10000 Pressure (mbar) ADC-value D2 vs Temperature (typical Temperature (°C) February 19th, 2008 -40° C 25° C 85° C 12000 14000 60 ...
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... Absolute Pressure Accuracy after Calibration, 1st order compensation 250 200 150 100 2000 4000 -50 -100 Absolute Pressure Accuracy after Calibration, 2nd order compensation 2000 4000 -20 -40 -60 -80 -100 DA5541C_001.doc 000055411194 ECN1037 6000 8000 10000 Pressure (mbar) 6000 8000 10000 Pressure (mbar) February 19th, 2008 85° ...
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... Temperature Error Accuracy vs temperature (typical -40 - 100 -40 -20 -25 -50 DA5541C_001.doc 000055411194 ECN1037 20 40 Temperature (°C) Pressure Error Accuracy vs temperature (typical Temperature (° C) February 19th, 2008 Temperature error (standard calculation) Temperature error (with 2nd order calculation Pres. error 4bar (1st order) Pres. error 4bar (2nd order ...
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... DA5541C_001.doc 000055411194 ECN1037 Pressure error vs supply voltage (typical) 2.8 3 3.2 Voltage (V) Temperature error vs supply voltage (typical) 2.8 3 3.2 Voltage (V) February 19th, 2008 14000 mbar 6000 mbar 3.4 3.6 1000 mbar 3.4 3 ...
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... FUNCTION GENERAL The MS5541C consists of a piezoresistive sensor and a sensor interface IC. The main function of the MS5541C is to convert the uncompensated analog output voltage from the piezoresistive pressure sensor into a 16-Bit digital value, as well as providing a 16-Bit digital value for the temperature of the sensor. ...
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... C3: Temperature coefficient of pressure sensitivity (10 Bit) C4: Temperature coefficient of pressure offset C5: Reference Temperature C6: Temperature coefficient of the temperature Read digital pressure value from MS5541 D1 (16 Bit) Read digital temperature value from MS5541 D2 (16 Bit) Calculate calibration temperature UT1=8*C5+10000 Calculate actual temperature Difference between actual temperature and reference ...
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... The second-order factors are calculated as follows: dT < 0 yes Low Temperatures dT2 = dT – (dT/128*dT/128)/2 Fig. 5: Flow chart for calculating the temperature and pressure to the optimum accuracy. DA5541C_001.doc 000055411194 ECN1037 C1 (13 Bit) DB7 DB6 ...
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... Fig. 1. The SCLK (Serial Clock) signal initiates the communication and synchronizes the data transfer with each Bit being sampled by the MS5541C on the rising edge of SCLK and each Bit being sent by the MS5541C on the rising edge of SCLK. The data should thus be sampled by the microcontroller on the falling edge of SCLK and sent to the MS5541C with the falling edge of SCLK. The SCLK-signal is generated by the microprocessor’ ...
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Conversion start for temperature measurement and ADC-data-out "D2": start of conversion sequence: START+T-measurement Bit0 Bit1 Bit2 Bit3 Bit4 Bit5 Bit6 Bit7 Bit8 Bit9 Start-bit Setup-bits Stop-bit Calibration data read out sequence for word 1/ word 3: sequence: coefficient read + ...
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... LIGHT SENSITIVITY The MS5541C is protected against sunlight by a layer of white gel. It is, however, important to note that the sensor may still be slightly sensitive to sunlight, especially to infrared light sources. This is due to the strong photo effect of silicon. As the effect is reversible there will be no damage, but the user has to take care that in the final product the sensor cannot be exposed to direct light during operation ...
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... DECOUPLING CAPACITOR Particular care must be taken when connecting the device to power supply: A 47µF tantalum capacitor must be placed as close as possible of the MS5541C's VDD pin. This capacitor will stabilize the power supply during data conversion and thus, provide the highest possible accuracy. ...
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... DEVICE PACKAGE OUTLINES Fig. 9: Device package outlines of MS5541C DA5541C_001.doc 000055411194 ECN1037 February 19th, 2008 17 ...
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... MS5541C provides the possibility to seal with an O-ring. The protective cap of the MS5541C is made of special anticorrosive stainless steel with a polished surface. In addition to this the MS5541C is filled with silicone gel covering the sensor and the bonding wires. The O-ring (or O-rings) shall be placed at the outer diameter of the metal cap ...
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... ORDERING INFORMATION Product Product Code Miniature 14 bar MS5541-CM module with metal cap FACTORY CONTACTS Intersema Sensoric SA Ch. Chapons-des-Prés 11 CH-2022 BEVAIX SWITZERLAND NOTICE Intersema reserves the right to make changes to the products contained in this data sheet in order to improve the design or performance and to supply the best possible products. Intersema assumes no responsibility for the use of any circuits shown in this data sheet, conveys no license under any patent or other rights unless otherwise specified in this data sheet, and makes no claim that the circuits are free from patent infringement ...