MS5803-01BA TEC | Alldatasheet
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SENSOR SOLUTIONS ///MS5803-01BA Page 1 09/2015 MS5803-01BA Miniature Variometer Module SPECIFICATIONS High resolution module, 10cm Fast conversion down to 1 ms Low power, 1 µA (standby < 0.15 µA) Integrated digital pressure sensor (24 bit ΔΣ ADC) Supply voltage 1.8 to 3.6 V Operating range: 10 to 1300 mbar, -40 to +85 °C I2C and SPI interface (Mode 0, 3) No external components (Internal oscillator) Excellent long term stability Hermetically sealable for outdoor devices High Endurance (HM version) The MS5803-01BA is a new generation of high resolution altimeter sensors from Measurement Specialties with SPI and I2C bus interface. The MS5803-01BA HE is the high endurance pad technology version of the MS5803-01BA pressure sensor module. It is optimized for altimeters and variometers with an altitude resolution of 10 cm. The sensor module includes a high linearity pressure sensor and an ultra low power 24 bit ΔΣ ADC with internal factory calibrated coefficients. It provides a precise digital
24 Bit pressure and temperature value and different operation
modes that allow the user to optimize for conversion speed and current consumption. A high resolution temperature output allows the implementation of an altimeter/thermometer function without any additional sensor. The MS5803-01BA can be interfaced to virtually any microcontroller. The communication protocol is simple, without the need of programming internal registers in the device. The gel protection and antimagnetic stainless steel cap allows the use in 100m water resistant altimeter/compass watches. This new sensor module generation is based on leading MEMS technology and latest benefits from MEAS proven experience and know-how in high volume manufacturing of altimeter modules, which have been widely used for over a decade. The sensing principle employed leads to very low hysteresis and high stability of both pressure and temperature
Miniature Variometer Module SENSOR SOLUTIONS ///MS5803-01BA 09/2015 Page 2
FEATURES
Mobile altimeter / barometer systems Bike computers Adventure or multi-mode watches Variometers Dataloggers High endurance pad technology (HM version) TECHNICAL DATA Sensor Performances (VDD = 3 V) Pressure Min Typ Max Unit Range 10 1300 mbar ADC 24 bit Resolution (1) 0.065 / 0.042 / 0.027 / 0.018 / 0.012 mbar Accuracy 25°C, 750 to 1100 mbar -1.5 +1.5 mbar Accuracy -20°C to + 85°C, 300 to 1100 mbar (2) -2.5 +2.5 mbar Response time 0.5 / 1.1 / 2.1 / 4.1 / 8.22 ms Long term stability -1 mbar/yr Temperature Min Typ Max Unit Range -40 +85 °C Resolution <0.01 °C Accuracy -0.8 +0.8 °C Notes: (1) Oversampling Ratio: 256 / 512 / 1024 / 2048 / 4096 (2) With autozero at one pressure point FUNCTIONAL BLOCK DIAGRAM VDD GND PS SCLK SDO SDI/SDA Meas. MUX ADC Digital Interface Memory (PROM) 128 bits SENSOR SGND +IN -IN dig. Filter Sensor Interface IC PGA CSB
Miniature Variometer Module SENSOR SOLUTIONS ///MS5803-01BA 09/2015 Page 3 PERFORMANCE SPECIFICATIONS ABSOLUTE MAXIMUM RATINGS Parameter Symbol Conditions Min. Typ. Max Unit Supply voltage VDD -0.3 +4.0 V Storage temperature TS -40 +125 °C Overpressure Pmax 100 m, ISO2281 10 bar Maximum Soldering Temperature Tmax 40 sec max 250 °C ESD rating Human Body Model -4 +4 kV Latch up JEDEC standard No 78 -100 +100 mA
ELECTRICAL CHARACTERISTICS
Parameter Symbol Conditions Min. Typ. Max Unit Operating Supply voltage VDD 1.8 3.0 3.6 V Operating Temperature T -40 +25 +85 °C Supply current (1 sample per sec.) IDD OSR 4096 2048 1024 512 256 12.5 6.3 3.2 1.7 0.9 µA Peak supply current during conversion 1.4 mA Standby supply current at 25°c 0.02 0.14 µA VDD Capacitor From VDD to GND 100 nF ANALOG DIGITAL CONVERTER (ADC) Parameter Symbol Conditions Min. Typ. Max Unit Output Word 24 bit Conversion time tc OSR 4096 2048 1024 512 256 7.40 3.72 1.88 0.95 0.48 8.22 4.13 2.08 1.06 0.54 9.04 4.54 2.28 1.17 0.60 ms
Miniature Variometer Module SENSOR SOLUTIONS ///MS5803-01BA 09/2015 Page 4 PERFORMANCE SPECIFICATIONS (CONTINUED) PRESSURE OUTPUT CHARACTERISTICS (VDD = 3 V, T = 25°C UNLESS OTHERWISE NOTED) Parameter Conditions Min. Typ. Max Unit Operating Pressure Range Prange Full Accuracy 300 1100 mbar Extended Pressure Range Pext Linear Range of ADC 10 1300 mbar Absolute Accuracy, no autozero at 25°C, 700..1100 mbar at 0..50°C, 300..1100 mbar at -20..85°C, 300..1100 mbar at -40..85°C, 300..1100 mbar -1.5 -2.0 -3.5 -6.0 +1.5 +2.0 +3.5 +6.0 mbar Absolute Accuracy, autozero at one pressure point at 25°C, 700..1100 mbar at 0..50°C, 300..1100 mbar at -20..85°C, 300..1100 mbar at -40..85°C, 300..1100 mbar -0.5 -1.0 -2.5 -5.0 +0.5 +1.0 +2.5 +5.0 mbar Maximum error with supply voltage VDD = 1.8 V … 3.6 V +/- 2 mbar Long-term stability -1 mbar/yr Resolution RMS OSR 4096 2048 1024 512 256 0.012 0.018 0.027 0.042 0.065 mbar TEMPERATURE OUTPUT CHARACTERISTICS (VDD = 3 V, T = 25°C UNLESS OTHERWISE NOTED) Parameter Conditions Min. Typ. Max Unit Absolute Accuracy at 25°C -20..85°C -40..85°C -0.8 -2.0 -4.0 +0.8 +2.0 +4.0 Maximum error with supply voltage Resolution RMS OSR 4096 2048 1024 512 256 0.002 0.003 0.005 0.008 0.012
Miniature Variometer Module SENSOR SOLUTIONS ///MS5803-01BA 09/2015 Page 5 PERFORMANCE SPECIFICATIONS (CONTINUED) DIGITAL INPUTS (PS, CSB, DIN, SCLK, SDA, SCL) Parameter Symbol Conditions Min. Typ. Max Unit Serial data clock SCLK SPI protocol 20 MHz Serial data clock SCL I2C protocol 400 kHz Input high voltage VIH Pins CSB 80% VDD 100% VDD V Input low voltage VIL 0% VDD 20% VDD V Input leakage current Ileak25°C at 25°c 0.15 µA CS low to first SCLK rising tCSL 21 ns CS low from last SCLK falling tCSH 21 ns DIGITAL OUTPUTS (DOUT, SDA, SCL) Parameter Symbol Conditions Min. Typ. Max Unit Output high voltage VOH Isource = 0.6 mA 80% VDD 100% VDD V Output low voltage VOL Isink = 0.6 mA 0% VDD 20% VDD V Load capacitance CLOAD 16 pF
Miniature Variometer Module SENSOR SOLUTIONS ///MS5803-01BA 09/2015 Page 6 PERFORMANCE CHARACTERISTICS PRESSURE ERROR VS PRESSURE AND TEMPERATURE TEMPERATURE ERROR VS TEMPERATURE PRESSURE AND TEMPERATURE ERROR VS SUPPLY VOLTAGE -6.0 -4.0 -2.0 0.0 2.0 4.0 6.0 0 200 400 600 800 1000 1200 Pressure error [mbar] Pressure [mbar] Absolute pressure accuracy with 2nd order compensation Typical -40 -2.0 0.0 2.0 4.0 6.0 8.0 10.0 -40 -20 0 20 40 60 80 Pressure error [mbar] Temperature [°C] Pressure accuracy vs temperature Typical 1000mbar 2nd order 600mbar 2nd order 300mbar 2nd order 1000mbar 1st order 600mbar 1st order 300mbar 1st order -2.0 0.0 2.0 4.0 6.0 8.0 10.0 12.0 -40 -20 0 20 40 60 80 Temperature error [°C] Temperature [°C] Temperature accuracy vs temperature Typical 1000mbar 2nd order 300mbar 2nd order 1000mbar 1st order 300mbar 1st order -2.0 -1.5 -1.0 -0.5 0.0 0.5 1.0 1.5 2.0 Pressure error [mbar] Supply Voltage [V] Pressure error vs supply voltage at 25°C Typical 1000mbar -0.8 -0.6 -0.4 -0.2 0.0 0.2 0.4 0.6 0.8 Temperature error [°C] Supply voltage [V] Temperature error vs supply voltage at 25°C Typical 1000 mbar
Miniature Variometer Module SENSOR SOLUTIONS ///MS5803-01BA 09/2015 Page 7 FUNCTIONAL DESCRIPTION Figure 1: Block diagram of MS5803-01BA GENERAL The MS5803-01BA consists of a piezo-resistive sensor and a sensor interface IC. The main function of the MS5803-01BA is to convert the uncompensated analogue output voltage from the piezo -resistive pressure sensor to a 24-bit digital value, as well as providing a 24-bit digital value for the temperature of the sens or. FACTORY CALIBRATION Every module is individually factory calibrated at two temperatures and t wo pressures. As a result, 6 coefficients necessary to compensate for process variations and temperature variations are calc ulated and stored in the 128- bit PROM of each module. These bits (partitioned into 6 coefficients W1 to W6) must be read by the microcontroller software and used in the program converting D1 and D2 into compensated pressure and temperature values. The 2 coefficients W0 and W7 are for factory configuration and CRC. SERIAL INTERFACE The MS5803-01BA has built in two types of serial interfaces: SPI and I2C. Pulling the Protocol Select pin PS to low selects the SPI protocol, pulling PS to high activates the I2C bus protocol. Pin PS Mode Pins used High I2C SDA, SCL, CSB Low SPI SDI, SDO, SCLK, CSB SPI MODE The external microcontroller clocks in the data through the input SCLK (Serial CLocK) and SDI (Serial Data In). In the SPI mode module can accept both mode 0 and mode 3 for the clock polarity and phas e. The sensor responds on the output SDO (Serial Data Out). The pin CSB (Chip Select) is used to enable/disable the interface, so that other devices can talk on the same SPI bus. The CSB pin can be pulled high after the command is sent or after the end of the command execution (for example end of conversion). The best noise performanc e from the module is obtained when the SPI bus is idle and without communication to other devices during th e ADC conversion. SCLK / SCL VDD GND PS SDO SDI / SDA Meas. MUX ADC Digital Interface Memory (PROM) 128 bits SENSOR SGND +IN -IN dig. Filter Sensor Interface IC PGA CSB
Miniature Variometer Module SENSOR SOLUTIONS ///MS5803-01BA 09/2015 Page 8 I2C MODE The external microcontroller clocks in the data through the input SCLK (Serial CLocK) and SDA (Serial DAta). The sensor responds on the same pin SDA which is bidirectional for the I 2C bus interface. So this interface type uses only 2 signal lines and does not require a chip select, which can be favorable to red uce board space. In I2C-Mode the complement of the pin CSB (Chip Select) represents the LSB of the I2C address. It is possible to use two sensors with two different addresses on the I 2C bus. The pin CSB shall be connected to VDD or GND (do not leave unconnected!). Pin CSB Address (7 bits) High 0x76 (1110110 b) Low 0x77 (1110111 b) COMMANDS The MS5803-01BA has only five basic commands: 1. Reset 2. Read PROM (128 bit of calibration words) 3. D1 conversion 4. D2 conversion 5. Read ADC result (24 bit pressure / temperature) Size of each command is 1 byte (8 bits) as described in the table below. After ADC read commands the device will return 24 bit result and after the PROM read 16bit result. The address of the PROM is em bedded inside of the PROM read command using the a2, a1 and a0 bits. Command byte hex value Bit number 0 1 2 3 4 5 6 7 Bit name PR M COV - Typ Ad2/ Os2 Ad1/ Os1 Ad0/ Os0 Stop Command Reset 0 0 0 1 1 1 1 0 0x1E Convert D1 (OSR=256) 0 1 0 0 0 0 0 0 0x40 Convert D1 (OSR=512) 0 1 0 0 0 0 1 0 0x42 Convert D1 (OSR=1024) 0 1 0 0 0 1 0 0 0x44 Convert D1 (OSR=2048) 0 1 0 0 0 1 1 0 0x46 Convert D1 (OSR=4096) 0 1 0 0 1 0 0 0 0x48 Convert D2 (OSR=256) 0 1 0 1 0 0 0 0 0x50 Convert D2 (OSR=512) 0 1 0 1 0 0 1 0 0x52 Convert D2 (OSR=1024) 0 1 0 1 0 1 0 0 0x54 Convert D2 (OSR=2048) 0 1 0 1 0 1 1 0 0x56 Convert D2 (OSR=4096) 0 1 0 1 1 0 0 0 0x58 ADC Read 0 0 0 0 0 0 0 0 0x00 PROM Read 1 0 1 0 Ad2 Ad1 Ad0 0 0xA0 to 0xAE Figure 4: Command structure
Miniature Variometer Module SENSOR SOLUTIONS ///MS5803-01BA 09/2015 Page 9 PRESSURE AND TEMPERATURE CALCULATION Figure 2: Flow chart for pressure and temperature reading and software compensation. Size [1] [bit] min max C1 Pressure sensitivity | SENST1 unsigned int 16 16 0 65535 40127 C2 Pressure offset | OFFT1 unsigned int 16 16 0 65535 36924 C3 Temperature coefficient of pressure sensitivity | TCS unsigned int 16 16 0 65535 23317 C4 Temperature coefficient of pressure offset | TCO unsigned int 16 16 0 65535 23282 C5 Reference temperature | TREF unsigned int 16 16 0 65535 33464 C6 Temperature coefficient of the temperature | TEMPSENS unsigned int 16 16 0 65535 28312 D1 Digital pressure value unsigned int 32 24 0 16777216 9085466 D2 Digital temperature value unsigned int 32 24 0 16777216 8569150 dT Difference between actual and reference temperature [2] dT = D2 - TREF = D2 - C5 * 2 8 signed int 32 25 -16776960 16777216 2366 2007 = 20.07 °C OFF Offset at actual temperature [3] OFF = OFFT1 + TCO * dT = C2 * 216 + (C4 * dT ) / 27 signed int 64 41 -8589672450 12884705280 2420281617 SENS Sensitivity at actual temperature [4] SENS = SENST1 + TCS * dT = C1 * 2 15 + (C3 * dT ) / 28 signed int 64 41 -4294836225 6442352640 1315097036 100009 = 1000.09 mbar Notes [1] [2] [3] [4] min and max have to be defined min and max have to be defined Maximal size of intermediate result during evaluation of variable 130000100058P Recommended variable typeDescription | Equation signed int 32Actual temperature (-40…85°C with 0.01°C resolution) TEMP = 20°C + dT * TEMPSENS = 2000 + dT * C6 / 223 Read digital pressure and temperature data signed int 32 Temperature compensated pressure (10…1300mbar with 0.01mbar resolution) P = D1 * SENS - OFF = (D1 * SENS / 2 21 - OFF) / 2 15 min and max have to be defined Convert calibration data into coefficients (see bit pattern of W1 to W4) Variable Example / Typical Value Calculate temperature compensated pressure 8500-4000TEMP 41 Start Maximum values for calculation results: PMIN = 10mbar PMAX = 1300mbar TMIN = -40°C TMAX = 85°C TREF = 20°C Read calibration data (factory calibrated) from PROM Read digital pressure and temperature data Calculate temperature Calculate temperature compensated pressure Display pressure and temperature value
Miniature Variometer Module SENSOR SOLUTIONS ///MS5803-01BA 09/2015 Page 10 SECOND ORDER TEMPERATURE COMPENSATION Yes No SENS2 = 7 (TEMP – 2000)2 / 23 SENS = SENS - SENS2 TEMP<20°C Low temperature T2 = dT OFF2 = 0 T2 = 0 OFF2 = 3 (TEMP – 2000)2 OFF = OFF - OFF2 TEMP = TEMP - T2 Low temperature High temperature Calculate pressure and temperature TEMP<-15°C No Yes SENS2 = SENS2 + 2 (TEMP + 1500)2 Low temperature Very low temperature SENS2 = 0 TEMP<45°C Yes No Very high temperature SENS2 = SENS2 - (TEMP - 4500)2 / 23 Figure 3: Flow chart for pressure and temperature to the optimum accuracy.
Miniature Variometer Module SENSOR SOLUTIONS ///MS5803-01BA 09/2015 Page 14 PROM READ SEQUENCE The PROM Read command consists of two parts. First command sets up the system into PROM read mode. The second part gets the data from the system. Figure 11: I2C Command to read memory address= 011 (Coefficient 3) Figure 12: I2C answer from MS5803-01BA CYCLIC REDUNDANCY CHECK (CRC) MS5803-01BA contains a PROM memory with 128-Bit. A 4-bit CRC has been implemented to check the data validity in memory. The application note AN520 describes in detail CRC-4 code used. A d d D B D B D B D B D B D B D B D B D B D B D B D B D B D B D B D B 0 16 bit reserved for manufacturer
1 Coefficient 1 (16 bit unsigned)
2 Coefficient 2 (16 bit unsigned)
3 Coefficient 3 (16 bit unsigned)
4 Coefficient 4 (16 bit unsigned)
5 Coefficient 5 (16 bit unsigned)
6 Coefficient 6 (16 bit unsigned)
7 CRC
Figure 16: Memory PROM mapping 1 1 1 0 1 1 CSB 0 0 1 0 1 0 0 1 1 0 0 S W A A P From Master S = Start Condition W = Write A = Acknowledge From Slave P = Stop Condition R = Read N = Not Acknowledge commandDevice Address Device Address cmd byte
Miniature Variometer Module SENSOR SOLUTIONS ///MS5803-01BA 09/2015 Page 15 APPLICATION CIRCUIT The MS5803-01BA is a circuit that can be used in conjunction with a microcontroller in mobile altimeter applications. It is designed for low-voltage systems with a supply voltage of 3 V. Figure 17: Typical application circuit with SPI / I2C protocol communication MS5803-01BA MS5803-01BA
Miniature Variometer Module SENSOR SOLUTIONS ///MS5803-01BA 09/2015 Page 16 PACKAGE OUTLINE AND PIN CONFIGURATION TOP view Pin Name Type Function
1 SCLK I Serial data clock
2 GND G Ground
3 CSB I Chip Select (active low)
4 NC NC -
5 VDD P Positive supply voltage
6 PS I Communication protocol select
7 SDI/SDA I Serial data input
8 SDO O Serial data output
Figure 18: MS5803-01BA package outlines, pin configuration and description Notes: (1) Dimensions in mm (2) General tolerance ±0.1 (3) Cap centering ± 0.15 from center of the ceramic RECOMMENDED PAD LAYOUT
Miniature Variometer Module SENSOR SOLUTIONS ///MS5803-01BA 09/2015 Page 17 SHIPPING PACKAGE Tube Tape & reel
Miniature Variometer Module SENSOR SOLUTIONS ///MS5803-01BA 09/2015 Page 18 MOUNTING AND ASSEMBLY CONSIDERATIONS SOLDERING Please refer to the application note AN808 available on our website for all soldering issues. MOUNTING The MS5803-01BA can be placed with automatic Pick & Place equipment usin g vacuum nozzles. It will not be damaged by the vacuum. Due to the low stress assembly the sensor does not show pressure hysteresis effects. It is important to solder all contact pads. CONNECTION TO PCB The package outline of the module allows the use of a flexible PCB for interco nnection. This can be important for applications in watches and other special devices. SEALING WITH O-RINGS In products like outdoor watches the electronics must be protected against direct water or humidity. For those products the MS5803-01BA provides the possibility to seal with an O-ring. The protective cap of the MS5803-01BA is made of special anticorrosive stainless steel with a polished surface. In addition to this the MS5803-01BA 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. This method avoids mechanical stress because the sensor can move in vertical direction. CLEANING The MS5803-01BA has been manufactured under cleanroom conditions. It is therefore recommended to assemble the sensor under class 10’000 or better conditions. Should this not be possible, it is recommended to protect the sensor opening during assembly from entering particles and dust. To avoid c leaning of the PCB, solder paste of type “no-clean” shall be used. Cleaning might damage the sensor! ESD PRECAUTIONS The electrical contact pads are protected against ESD up to 4 kV HBM (human body model). It is therefore essential to ground machines and personnel properly during assembly and handling of the devi ce. The MS5803-01BA is shipped in antistatic transport boxes. Any test adapters or production transport boxes used during the assembly of the sensor shall be of an equivalent antistatic material. DECOUPLING CAPACITOR Particular care must be taken when connecting the device to the power supply. A 100 nF ceramic capacitor must be placed as close as possible to the MS5803-01BA VDD pin. This capacitor will stab ilize the power supply during data conversion and thus, provide the highest possible accuracy.
Miniature Variometer Module SENSOR SOLUTIONS ///MS5803-01BA 09/2015 Page 19
ORDERING INFORMATION
Art. Number Product MEAS Production Site Delivery Form MS580301BA01-00 MS5803-01BA Miniature Variometer Module Switzerland Tube MS580301BA01-50 MS5803-01BA Miniature Variometer Module T&R Switzerland Tape&Reel MS580301BA01-08 MS5803-01BA Miniature Variometer Module China MS580301BA06-00 MS5803-01BA Miniature Variometer Module HE Switzerland Tube MS580301BA06-50 MS5803-01BA Miniature Variometer Module HE T&R Switzerland Tape&Reel TE.com/sensorsolutions Measurement Specialties, Inc., a TE Connectivity company. Measurement Specialties, TE Connectivity, TE Connectivity (logo) and EVERY CONNECTION COUNTS are trademarks. All other logos, products and/or company names referred to herein might be trademarks of their respective owners. The information given herein, including drawings, illustrations and schematics which are intended for illustration purposes only, is belie ved to be reliable. However, TE Connectivity makes no warranties as to its accuracy or completeness and disclaims any liability in connection with its use. TE Connectivity‘s ob ligations shall only be as set forth in TE Connectivity‘s Standard Terms and Conditions of Sale for this product and in no case will TE Connectivity be liable for any incidental, indirect or consequential damages arising out of the sale, resale, use or misuse of the product. Users of TE Connectivity products should make their own evaluation to determine the suitability of each such product for the specific application. © 2015 TE Connectivity Ltd. family of companies All Rights Reserved. DA5803-01BA_011
000058031533 ECN2224
Measurement Specialties, Inc., a TE Connectivity Company
45738 Northport Loop West
Fremont, CA 94538 Tel: +1 800 767 1888 Fax: +1 510 498 1578 e-mail: pfg.cs.amer@meas-spec.com Website: www.meas-spec.com EUROPE Measurement Specialties (Europe), Ltd., a TE Connectivity Company Switzerland Sàrl Ch. Chapons-des-Prés 11 CH-2022 Bevaix Tel: +41 32 847 9550 Fax: + 41 32 847 9569 e-mail: sales.ch@meas-spec.com Website: www.meas-spec.com ASIA Measurement Specialties (China), Ltd., a TE Connectivity Company No. 26 Langshan Road Shenzhen High-Tech Park (North) Nanshan District, Shenzhen, 518057 China Tel: +86 755 3330 5088 Fax: +86 755 3330 5099 e-mail: pfg.cs.asia@meas-spec.com Website: www.meas-spec.com