PDF MS5541-30C Data sheet ( Hoja de datos )

Número de pieza	MS5541-30C
Descripción	Miniature 30 bar Module
Fabricantes	TE
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No Preview Available ! MS5541-30C Miniature 30 bar Module SPECIFICATIONS  0 – 30 bar absolute pressure range  6 coefficients for software compensation stored on-chip  Piezoresistive silicon micromachined sensor  Integrated miniature pressure sensor 6.2 x 6.4 mm  16 Bit ADC  3-wire serial interface  1 system clock line (32.768 kHz)  Low voltage and low power consumption  High Endurance (HM version) The MS5541-30C is the high-pressure version of MS5541C pressure sensor module. The MS5541-30HM is the high endurance pad technology version of MS5541-30C pressure sensor module. It contains a precision piezoresistive pressure sensor and an improved version of the 16 Bit Micropower Sensor interface IC known from the MS5535C. The ESD sensitivity has been improved to 4kV on all pins. In addition to this the MS5541-30C 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 16 Bit pressure and temperature data via a 3 wire serial interface that can be easily interfaced with 4 Bit low power microcontrollers. 64 Bit of factory programmed PROM provides calibration data for a highly accurate pressure and temperature calculation. SENSOR SOLUTIONS ///MS5541-30C 09/2015 Page 1 1 page MS5541-30C Miniature 30 bar Module PERFORMANCE SPECIFICATIONS (CONTINUED) DIGITAL INPUTS Parameter Input High Voltage Input Low Voltage Signal Rise Time Signal Fall Time Symbol VIH VIL tr tf Conditions (T = -40 °C .. 85 °C, VDD = 2.2 V .. 3.6 V) Min Typ Max Unit 80% VDD 100% VDD V 0% VDD 20% VDD V 200 ns 200 ns DIGITAL OUTPUTS Parameter Output High Voltage Output Low Voltage Signal Rise Time Signal Fall Time AD-CONVERTER Parameter Resolution Linear Range Conversion Time INL Symbol VOH VOL tr tf Conditions Isource = 0.6 mA Isink = 0.6 mA (T = -40 °C .. 85 °C VDD = 2.2 V .. 3.6 V) Min Typ Max Unit 80% VDD 100% VDD V 0% VDD 20% VDD V 200 ns 200 ns Symbol Conditions MCLK = 32.768 kHz Within linear range Min 4'000 -5 (T = -40 °C .. 85 °C VDD = 2.2 V .. 3.6 V) Typ Max Unit 16 Bit 40'000 LSB 35 ms +5 LSB SENSOR SOLUTIONS ///MS5541-30C 09/2015 Page 5 5 Page MS5541-30C Miniature 30 bar Module SERIAL INTERFACE The MS5541-30C communicates with microprocessors and other digital systems via a 3-wire synchronous serial interface as shown in Fig. 1. The SCLK (Serial clock) signal initiates the communication and synchronizes the data transfer with each bit being sampled by the MS5541-30C on the rising edge of SCLK and each bit being sent by the MS5541-30C 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 MS5541-30C with the falling edge of SCLK. The SCLK-signal is generated by the microprocessor’s system. The digital data provided by the MS5541-30C on the DOUT pin is either the conversion result or the software calibration data. In addition, the signal DOUT (Data out) is also used to indicate the conversion status (conversion-ready signal, see below). The selection of the output data is done by sending the corresponding instruction on the pin DIN (Data input). Following is a list of possible output data instructions:  Conversion start for pressure measurement and ADC-data-out  Conversion start for temperature measurement and ADC-data-out  Calibration data read-out sequence for Word1  Calibration data read-out sequence for Word2  Calibration data read-out sequence for Word3  Calibration data read-out sequence for Word4  RESET sequence “D1” (Figure 6a) “D2” (Figure 6b) (Figure 6c) (Figure 6d) (Figure 6c) (Figure 6d) (Figure 6e) Every communication starts with an instruction sequence at pin DIN. Fig. 6 shows the timing diagrams for the MS5541-30C. The device does not need a ‘Chip select’ signal. Instead there is a START sequence (3-Bit high) before each SETUP sequence and STOP sequence (3-Bit low) after each SETUP sequence. The SETUP sequence consists in 4-Bit that select a reading of pressure, temperature or calibration data. In case of pressure- (D1) or temperature- (D2) reading the module acknowledges the start of a conversion by a low to high transition at pin DOUT. Two additional clocks at SCLK are required after the acknowledge signal. Then SCLK is to be held low by the microcontroller until a high to low transition on DOUT indicates the end of the conversion. This signal can be used to create an interrupt in the microcontroller. The microcontroller may now read out the 16 bit word by giving another 17 clocks on the SLCK pin. It is possible to interrupt the data READOUT sequence with a hold of the SCLK signal. It is important to always read out the last conversion result before starting a new conversion. The RESET sequence is special as the module in any state recognizes its unique pattern. By consequence, it can be used to restart if synchronization between the microcontroller and the MS5541-30C has been lost. This sequence is 21-bit long. The DOUT signal might change during that sequence (see Fig. 6e). It is recommended to send the RESET sequence before each CONVERSION sequence to avoid hanging up the protocol permanently in case of electrical interference. Conversion start for pressure measurement and ADC-data-out "D1": end of conversion start of conversion sequence: START+P-measurement Bit0 Bit1 Bit2 Bit3 Bit4 Bit5 Bit6 Bit7 Bit8 Bit9 S tart-b it Setu p -b its Sto p -b it co n v ers io n (3 3 ms ) ADC-data outMSB DB7 DB6 DB5 DB4 DB3 DB2 DB1 ADC-data outLSB DB0 DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0 Fig. 6a: D1 ACQUISITION sequence SENSOR SOLUTIONS ///MS5541-30C 09/2015 Page 11 11 Page

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