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 SENSOR SOLUTIONS ///MS5803-01BA 09/2015 Page 1 MS5803-01BA Miniature Variometer Module FEATURES FIELD OF APPLICATION 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 Range Typ 10 ADC Resolution (1) Accuracy 25°C, 750 to 1100 mbar Accuracy -20°C to + 85°C, 300 to 1100 mbar (2) Max Unit 1300 mbar 24 bit 0.065 / 0.042 / 0.027 / 0.018 / 0.012 mbar -1.5 +1.5 mbar -2.5 +2.5 mbar Long term stability 0.5 / 1.1 / 2.1 / 4.1 / 8.22 -1 Temperature Min Range -40 Response time Resolution Typ ms mbar/yr Max Unit +85 °C <0.01 Accuracy -0.8 °C +0.8 °C Notes: (1) Oversampling Ratio: 256 / 512 / 1024 / 2048 / 4096 (2) With autozero at one pressure point FUNCTIONAL BLOCK DIAGRAM VDD PS Meas. MUX SENSOR CSB Digital Interface +IN -IN PGA ADC Sensor Interface IC SDI/SDA SDO dig. Filter SCLK Memory (PROM) 128 bits SGND GND SENSOR SOLUTIONS ///MS5803-01BA 09/2015 Page 2 MS5803-01BA Miniature Variometer Module PERFORMANCE SPECIFICATIONS ABSOLUTE MAXIMUM RATINGS Parameter Supply voltage Storage temperature Overpressure Maximum Soldering Temperature Symbol VDD TS Pmax Conditions Tmax Min. -0.3 -40 100 m, ISO2281 Max +4.0 +125 10 Unit V °C bar 40 sec max 250 °C -4 +4 kV -100 +100 mA Max 3.6 +85 Unit V °C Human Body Model JEDEC standard No 78 ESD rating Latch up Typ. ELECTRICAL CHARACTERISTICS Parameter Operating Supply voltage Operating Temperature Supply current (1 sample per sec.) Symbol VDD T IDD Peak supply current Standby supply current VDD Capacitor Conditions Min. 1.8 -40 Typ. 3.0 +25 OSR 4096 2048 1024 512 256 during conversion at 25°c From VDD to GND 100 Conditions Min. Typ. 24 Max 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 12.5 6.3 3.2 1.7 0.9 1.4 0.02 µA 0.14 mA µA nF ANALOG DIGITAL CONVERTER (ADC) Parameter Output Word Conversion time SENSOR SOLUTIONS ///MS5803-01BA Symbol tc OSR 4096 2048 1024 512 256 09/2015 Unit bit ms Page 3 MS5803-01BA Miniature Variometer Module PERFORMANCE SPECIFICATIONS (CONTINUED) PRESSURE OUTPUT CHARACTERISTICS (VDD = 3 V, T = 25°C UNLESS OTHERWISE NOTED) Parameter Operating Pressure Range Extended Pressure Range Absolute Accuracy, no autozero Absolute Accuracy, autozero at one pressure point Maximum error with supply voltage Long-term stability Conditions Prange Full Accuracy Linear Range of Pext ADC 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 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 Min. 300 Max 1100 Unit mbar 10 1300 mbar -1.5 -2.0 -3.5 -6.0 -0.5 -1.0 -2.5 -5.0 +1.5 +2.0 +3.5 +6.0 +0.5 +1.0 +2.5 +5.0 VDD = 1.8 V … 3.6 V OSR Resolution RMS 4096 2048 1024 512 256 Typ. mbar mbar +/- 2 mbar -1 0.012 0.018 0.027 0.042 0.065 mbar/yr mbar TEMPERATURE OUTPUT CHARACTERISTICS (VDD = 3 V, T = 25°C UNLESS OTHERWISE NOTED) Parameter Absolute Accuracy Maximum error with supply voltage Conditions at 25°C -20..85°C -40..85°C VDD = 1.8 V … 3.6 V OSR Resolution RMS Min. -0.8 -2.0 -4.0 4096 2048 1024 512 256 Typ. Max +0.8 +2.0 +4.0 Unit °C +/- 0.5 °C 0.002 0.003 0.005 0.008 0.012 °C + SENSOR SOLUTIONS ///MS5803-01BA 09/2015 Page 4 MS5803-01BA Miniature Variometer Module PERFORMANCE SPECIFICATIONS (CONTINUED) DIGITAL INPUTS (PS, CSB, DIN, SCLK, SDA, SCL) Parameter Serial data clock Serial data clock Input high voltage Input low voltage Input leakage current CS low to first SCLK rising CS low from last SCLK falling Symbol SCLK SCL VIH VIL Ileak25°C tCSL tCSH Conditions SPI protocol I2C protocol Pins CSB Min. Typ. Max 20 400 100% VDD 20% VDD 0.15 Unit MHz kHz V V µA ns ns Typ. Max 100% VDD 20% VDD Unit V V pF 80% VDD 0% VDD at 25°c 21 21 DIGITAL OUTPUTS (DOUT, SDA, SCL) Parameter Output high voltage Output low voltage Load capacitance SENSOR SOLUTIONS ///MS5803-01BA Symbol VOH VOL CLOAD Conditions Isource = 0.6 mA Isink = 0.6 mA Min. 80% VDD 0% VDD 16 09/2015 Page 5 MS5803-01BA Miniature Variometer Module PERFORMANCE CHARACTERISTICS PRESSURE ERROR VS PRESSURE AND TEMPERATURE Pressure accuracy vs temperature Typical 6.0 10.0 4.0 8.0 Pressure error [mbar] Pressure error [mbar] Absolute pressure accuracy with 2nd order compensation Typical 85 2.0 25 0 0.0 -40 -2.0 1000mbar 2nd order 600mbar 2nd order 300mbar 2nd order 1000mbar 1st order 600mbar 1st order 300mbar 1st order 6.0 4.0 2.0 0.0 -4.0 -2.0 -6.0 0 200 400 600 800 1000 -40 1200 -20 0 20 40 60 80 Temperature [°C] Pressure [mbar] TEMPERATURE ERROR VS TEMPERATURE Temperature accuracy vs temperature Typical 12.0 Temperature error [°C] 10.0 8.0 1000mbar 2nd order 6.0 300mbar 2nd order 4.0 1000mbar 1st order 2.0 300mbar 1st order 0.0 -2.0 -40 -20 0 20 40 60 80 Temperature [°C] PRESSURE AND TEMPERATURE ERROR VS SUPPLY VOLTAGE Temperature error vs supply voltage at 25°C Typical 0.8 1.5 0.6 1.0 0.4 0.5 0.2 0.0 1000mbar -0.5 -1.0 -1.5 Temperature error [°C] Pressure error [mbar] Pressure error vs supply voltage at 25°C Typical 2.0 0.0 1000 mbar -0.2 -0.4 -0.6 -2.0 1.8 2.0 2.2 2.4 2.6 2.8 3.0 3.2 3.4 3.6 -0.8 1.8 2.0 Supply Voltage [V] SENSOR SOLUTIONS ///MS5803-01BA 2.2 2.4 2.6 2.8 3.0 3.2 3.4 3.6 Supply voltage [V] 09/2015 Page 6 MS5803-01BA Miniature Variometer Module FUNCTIONAL DESCRIPTION VDD PS Meas. MUX CSB Digital Interface +IN SENSOR PGA -IN ADC SDO dig. Filter Sensor Interface IC SDI / SDA SCLK / SCL Memory (PROM) 128 bits SGND GND 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 sensor. FACTORY CALIBRATION Every module is individually factory calibrated at two temperatures and two pressures. As a result, 6 coefficients necessary to compensate for process variations and temperature variations are calculated and stored in the 128bit 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 Low I2 C SPI SDA, SCL, CSB 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 phase. 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 performance from the module is obtained when the SPI bus is idle and without communication to other devices during the ADC conversion. SENSOR SOLUTIONS ///MS5803-01BA 09/2015 Page 7 MS5803-01BA Miniature Variometer Module 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 reduce 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 I2C bus. The pin CSB shall be connected to VDD or GND (do not leave unconnected!). Pin CSB Address (7 bits) High Low 0x76 (1110110 b) 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 embedded inside of the PROM read command using the a2, a1 and a0 bits. Bit number Bit name Command Reset Convert D1 (OSR=256) Convert D1 (OSR=512) Convert D1 (OSR=1024) Convert D1 (OSR=2048) Convert D1 (OSR=4096) Convert D2 (OSR=256) Convert D2 (OSR=512) Convert D2 (OSR=1024) Convert D2 (OSR=2048) Convert D2 (OSR=4096) ADC Read PROM Read Command byte 0 1 2 PR COV M 3 Typ 4 5 6 7 Ad2/ Ad1/ Ad0/ Stop Os2 Os1 Os0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 0 0 0 0 0 1 1 1 1 1 0 0 1 0 0 0 0 1 0 0 0 0 1 0 Ad2 0 1 1 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 hex value 1 0 0 1 1 0 0 0 1 1 0 0 Ad1 1 0 1 0 1 0 0 1 0 1 0 0 Ad0 0 0 0 0 0 0 0 0 0 0 0 0 0 0x1E 0x40 0x42 0x44 0x46 0x48 0x50 0x52 0x54 0x56 0x58 0x00 0xA0 to 0xAE Figure 4: Command structure SENSOR SOLUTIONS ///MS5803-01BA 09/2015 Page 8 MS5803-01BA Miniature Variometer Module PRESSURE AND TEMPERATURE CALCULATION Start Maximum values for calculation results: PMIN = 10mbar PMAX = 1300mbar TMIN = -40°C TMAX = 85°C TREF = 20°C Convert calibration datadata into coefficients (see bit pattern W1 to W4) Read calibration (factory calibrated) from of PROM Variable Description | Equation Recommended variable type Size [1] [bit] min max Example / Typical C1 Pressure sensitivity | SENST1 unsigned int 16 16 0 65535 40127 C2 Pressure offset | OFFT1 unsigned int 16 16 0 65535 36924 Value 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 Read digitalpressure pressure and and temperature data Read digital temperature data D1 Digital pressure value unsigned int 32 24 0 16777216 9085466 D2 Digital temperature value unsigned int 32 24 0 16777216 8569150 signed int 32 25 -16776960 16777216 2366 signed int 32 41 -4000 8500 Calculate temperature [2] dT Difference between actual and reference temperature dT = D2 - TREF = D2 - C5 * 2 8 TEMP Actual temperature (-40…85°C with 0.01°C resolution) TEMP = 20°C + dT * TEMPSENS = 2000 + dT * C6 / 223 2007 = 20.07 °C Calculate temperature compensated compensated pressure Calculate temperature pressure OFF Offset at actual temperature [3] OFF = OFFT1 + TCO * dT = C2 * 216 + (C4 * dT ) / 27 signed int 64 41 -8589672450 12884705280 2420281617 1315097036 [4] SENS Sensitivity at actual temperature SENS = SENST1 + TCS * dT = C1 * 2 15 + (C3 * dT ) / 28 signed int 64 41 -4294836225 6442352640 P Temperature compensated pressure (10…1300mbar with 0.01mbar resolution) P = D1 * SENS - OFF = (D1 * SENS / 2 21 - OFF) / 2 15 signed int 32 58 1000 130000 100009 = 1000.09 mbar Display pressure and temperature value Notes [1] [2] [3] [4] Maximal size of intermediate result during evaluation of variable min and max have to be defined min and max have to be defined min and max have to be defined Figure 2: Flow chart for pressure and temperature reading and software compensation. SENSOR SOLUTIONS ///MS5803-01BA 09/2015 Page 9 MS5803-01BA Miniature Variometer Module SECOND ORDER TEMPERATURE COMPENSATION No Yes TEMP<20°C Low temperature Low temperature 2 High temperature 31 T2 = 0 OFF2 = 0 SENS2 = 0 T2 = dT / 2 OFF2 = 3 (TEMP – 2000)2 2 3 SENS2 = 7 (TEMP – 2000) / 2 Yes No Yes TEMP<-15°C Low temperature TEMP<45°C No Very high temperature Very low temperature SENS2 = SENS2 + 2 (TEMP + 1500) 2 2 3 SENS2 = SENS2 - (TEMP - 4500) / 2 Calculate pressure and temperature TEMP = TEMP - T2 OFF = OFF - OFF2 SENS = SENS - SENS2 Figure 3: Flow chart for pressure and temperature to the optimum accuracy. SENSOR SOLUTIONS ///MS5803-01BA 09/2015 Page 10 MS5803-01BA Miniature Variometer Module SPI INTERFACE RESET SEQUENCE The Reset sequence shall be sent once after power-on to make sure that the calibration PROM gets loaded into the internal register. It can be also used to reset the device ROM from an unknown condition 0 1 2 3 4 5 6 7 SCLK CSB SDI 2.8ms RELOAD SDO PS Figure 5: Reset command sequence SPI mode 0 0 1 2 3 4 5 6 7 SCLK CSB SDI 2.8ms RELOAD SDO PS Figure 6: Reset command sequence SPI mode 3 SENSOR SOLUTIONS ///MS5803-01BA 09/2015 Page 11 MS5803-01BA Miniature Variometer Module CONVERSION SEQUENCE The conversion command is used to initiate uncompensated pressure (D1) or uncompensated temperature (D2) conversion. The chip select can be disabled during this time to communicate with other devices. After the conversion, using ADC read command the result is clocked out with the MSB first. If the conversion is not executed before the ADC read command, or the ADC read command is repeated, it will give 0 as the output result. If the ADC read command is sent during conversion the result will be 0, the conversion will not stop and the final result will be wrong. Conversion sequence sent during the already started conversion process will yield incorrect result as well. 0 1 2 3 4 5 6 7 SCLK CSB SDI 8.22ms ADC CONVERSION SDO PS Figure 7: Conversion out sequence, Typ=d1, OSR = 4096 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 27 28 29 30 31 SCLK CSB SDI READING 24BIT ADC RESULT MSB FIRST SDO PS Figure 8: ADC Read sequence PROM READ SEQUENCE The read command for PROM shall be executed once after reset by the user to read the content of the calibration PROM and to calculate the calibration coefficients. There are in total 8 addresses resulting in a total memory of 128 bit. Address 0 contains factory data and the setup, addresses 1-6 calibration coefficients and address 7 contains the serial code and CRC. The command sequence is 8 bits long with a 16 bit result which is clocked with the MSB first. 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 SCLK CSB SDI READING 16BIT PROM VALUE MSB FIRST SDO PS Figure 9: PROM Read sequence, address = 011 (Coefficient 3). SENSOR SOLUTIONS ///MS5803-01BA 09/2015 Page 12 MS5803-01BA Miniature Variometer Module I2C INTERFACE COMMANDS Each I2C communication message starts with the start condition and it is ended with the stop condition. The MS5803-01BA address is 111011Cx, where C is the complementary value of the pin CSB. Since the IC does not have a microcontroller inside, the commands for I2C and SPI are quite similar. RESET SEQUENCE The reset can be sent at any time. In the event that there is not a successful power on reset this may be caused by the SDA being blocked by the module in the acknowledge state. The only way to get the MS5803-01BA to function is to send several SCLKs followed by a reset sequence or to repeat power on reset. . 1 1 1 0 1 1 CSB 0 0 0 0 0 1 1 1 1 0 0 Device Address command S Device Address W A cmd byte A P From Master From Slave S = Start Condition P = Stop Condition W = Write R = Read A = Acknowledge N = Not Acknowledge Figure 10: I2C Reset Command CONVERSION SEQUENCE A conversion can be started by sending the command to MS5803-01BA. When command is sent to the system it stays busy until conversion is done. When conversion is finished the data can be accessed by sending a Read command, when an acknowledge appears from the MS5803-01BA, 24 SCLK cycles may be sent to receive all result bits. Every 8 bit the system waits for an acknowledge signal. 1 1 1 0 1 1 CSB 0 0 0 1 0 0 1 0 0 0 0 Device Address command S Device Address W A cmd byte A P From Master From Slave S = Start Condition P = Stop Condition W = Write R = Read A = Acknowledge N = Not Acknowledge Figure 13: I2C Command to initiate a pressure conversion (OSR=4096, typ=D1) 1 1 1 0 1 1 CSB 0 0 0 0 0 0 0 0 0 0 0 Device Address command S Device Address W A cmd byte A P From Master From Slave S = Start Condition P = Stop Condition W = Write R = Read A = Acknowledge N = Not Acknowledge Figure 14: I2C ADC read sequence Figure 15: I2C pressure response (D1) on 24 bit from MS5803-01BA SENSOR SOLUTIONS ///MS5803-01BA 09/2015 Page 13 MS5803-01BA Miniature Variometer Module 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. 1 1 1 0 1 1 CSB 0 0 1 0 1 0 0 1 1 0 0 Device Address command S Device Address W A cmd byte A P From Master From Slave S = Start Condition P = Stop Condition W = Write R = Read A = Acknowledge N = Not Acknowledge 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 0 1 2 3 4 5 6 7 D B 1 5 D B 1 4 D B 1 3 D B 1 2 D B 1 1 D D D D D D D D D D D B B B B B B B B B B B 1 9 8 7 6 5 4 3 2 1 0 0 16 bit reserved for manufacturer Coefficient 1 (16 bit unsigned) Coefficient 2 (16 bit unsigned) Coefficient 3 (16 bit unsigned) Coefficient 4 (16 bit unsigned) Coefficient 5 (16 bit unsigned) Coefficient 6 (16 bit unsigned) CRC Figure 16: Memory PROM mapping SENSOR SOLUTIONS ///MS5803-01BA 09/2015 Page 14 MS5803-01BA Miniature Variometer Module 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. MS5803-01BA MS5803-01BA Figure 17: Typical application circuit with SPI / I2C protocol communication SENSOR SOLUTIONS ///MS5803-01BA 09/2015 Page 15 MS5803-01BA Miniature Variometer Module PACKAGE OUTLINE AND PIN CONFIGURATION 5 4 6 3 7 2 8 1 TOP view 8 1 7 2 6 5 3 4 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 SPI / I2C 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 SENSOR SOLUTIONS ///MS5803-01BA 09/2015 Page 16 MS5803-01BA Miniature Variometer Module SHIPPING PACKAGE Tube Tape & reel SENSOR SOLUTIONS ///MS5803-01BA 09/2015 Page 17 MS5803-01BA Miniature Variometer Module 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 using 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 interconnection. 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 cleaning 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 device. 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 stabilize the power supply during data conversion and thus, provide the highest possible accuracy. SENSOR SOLUTIONS ///MS5803-01BA 09/2015 Page 18 MS5803-01BA Miniature Variometer Module ORDERING INFORMATION Part Number / Art. Number MS580301BA01-00 MS580301BA01-50 Product MS5803-01BA Miniature Variometer Module MS5803-01BA Miniature Variometer Module T&R MEAS Production Site Switzerland Switzerland MS580301BA01-08 MS5803-01BA Miniature Variometer Module China MS580301BA06-00 MS580301BA06-50 MS5803-01BA Miniature Variometer Module HE MS5803-01BA Miniature Variometer Module HE T&R Switzerland Switzerland Delivery Form Tube Tape&Reel Tube Tape&Reel NORTH AMERICA EUROPE ASIA 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: [email protected] Website: www.meas-spec.com 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: [email protected] Website: www.meas-spec.com 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: [email protected] Website: www.meas-spec.com 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 believed 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 obligations 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 SENSOR SOLUTIONS ///MS5803-01BA 09/2015 Page 19