MS5839-02BA36

MS5839-02BA Ultra-compact, chlorine resistant, digital pressure and temperature sensor Miniaturization, performance and precision are key for sensors embedded in consumer devices like swim watches and diving equipment. Expanding on TE Connectivity’s (TE) portfolio of ultra-compact digital altimeters, our MS5839 2 bar model is designed to meet the next generation of device manufacturer designs and challenges. TE’s MS5839 is an ultra-compact (3.3 x 3.3 x 2.75 mm) digital altimeter that is optimized for applications where chlorine and saline are present. The robust, gel-filled design of the MS5839 enables operation in harsh media environments while providing accurate and reliable digital measurements. This MEMS based sensor offers advanced water resistance, chlorine resistance, shielding, low power consumption and digital interconnectivity in an ultra-compact, low profile package. The board level design delivers sensing accuracy for both pressure (±0.5mbar) and temperature (±2ºC) measurements. Take your devices to the next level with the MS5839-02BA. FEATURES APPLICATIONS • Ceramic and metal package: 3.3 x 3.3 x 2.75mm • Shallow Diving Computers • High resolution module: 13 cm • Swim Watches • Supply voltage: 1.5 to 3.6 V • Fitness Trackers • Low power: 0.6 µA (standby ≤ 0.1 µA at 25°C) • Underwater Vehicles • Integrated digital pressure sensor (24-bit ΔΣ ADC) • Diving Equipment • Operating range: 300 to 1,200 mbar, -20 to +85 °C • Diving Computers • I2C interface • No external components (internal oscillator) • Water resistant sealing with 1.8 x 0.8mm O-ring • Chlorine resistant • Shielded metal lid TE CONNECTIVITY SENSORS /// MS5839-02BA REV A4 09/2021 Page 1 MS5839-02BA Ultra-compact, chlorine resistant, digital pressure and temperature sensor PREFORMANCE SPECIFCIATIONS ABSOLUTE MAXIMUM RATINGS Parameter Supply voltage Storage temperature Overpressure Maximum Soldering Temperature (2) ESD rating (lid to GND version) Symbol VDD TS Pmax Conditions Tmax (2) ISO 22810(1) Max +3.6 +85 10 Unit V °C bar 40 sec. max 250 °C -2 +2 kV -100 +100 mA Typ. 3.0 +25 20.09 10.05 5.02 2.51 1.26 0.63 1.25 Max 3.6 +85 Unit V °C 0.01 0.1 Human Body Model JEDEC JESD78 standard Latch up (1) Min. -0.3 -40 Typ. Pressure ramp up/down min 60s Refer to application note 808 ELECTRICAL CHARACTERISTICS Parameter Operating Supply voltage Operating Temperature Supply current (1 sample per sec.) Symbol VDD T IDD Peak supply current Standby supply current Power supply hold off for internal reset (3) VDD Capacitor Resistor value between the lid and the GND (3) Conditions Min. 1.5 -20 8192 4096 2048 OSR 1024 512 256 during conversion at 25°C (VDD = 3.0 V) VDD < 0.1V from VDD to GND 200 100 µA mA µA 470 ms nF 1000 Ω Supply voltage power up must be continuous from GND to VDD without any step ANALOG DIGITAL CONVERTER (ADC) Parameter Output Word ADC Conversion time (4) (4) Symbol tc Conditions OSR Min. 8192 4096 2048 1024 512 256 Typ. 24 16.44 8.22 4.13 2.08 1.06 0.54 Max 17.2 8.61 4.32 2.17 1.10 0.56 Unit bit ms Maximum values must be used to determine waiting times in I 2C communication TE CONNECTIVITY SENSORS /// MS5839-02BA REV A4 09/2021 Page 2 MS5839-02BA Ultra-compact, chlorine resistant, digital pressure and temperature sensor PERFORMANCE SPECIFICATIONS (Continued) PRESSURE OUTPUT CHARACTERISTICS (VDD = 3 V, T = 25°C UNLESS OTHERWISE NOTED) Parameter Operating Pressure Range Extended Pressure Range Relative Accuracy (1) (4) Resolution RMS Maximum error with supply voltage (2) Long-term stability Reflow soldering impact Conditions Prange Linear Range of Pext ADC 600...1000 mbar, at 20°C 300...1100 mbar, 0...60°C 300...1100 mbar, -20...85°C 8192 4096 2048 OSR 1024 512 256 Min. 300 Max 1200 Unit mbar 10 2000 mbar -0.5 -2 -4 +0.5 +2 +4 mbar VDD = 1.5 V…3.6 V IPC/JEDEC J-STD-020C (Refer to application note AN808) Recovering time after reflow (3) Typ. 0.016 0.021 0.028 0.039 0.062 0.11 mbar ±2 mbar ±1 mbar/yr ±4 mbar 7 days (1) With autozero at one pressure point (2) With autozero at 3V point (3) Time to recover at least 66% of reflow impact (4) Wet/dry cycle: sensor must be dried typically once a day TEMPERATURE OUTPUT CHARACTERISTICS (VDD = 3 V, T = 25°C UNLESS OTHERWISE NOTED) Parameter Relative Accuracy Maximum error with supply voltage Resolution RMS Conditions -20…85°C, 300…1100 mbar Min. -2 VDD = 1.5 V…3.6 V OSR 8192 4096 2048 1024 512 256 Typ. Max +2 Unit °C ±0.3 °C 0.002 0.003 0.004 0.006 0.009 0.012 °C DIGITAL INPUTS (SDA, SCL) Parameter Serial data clock Input high voltage Input low voltage Input leakage current Symbol SCL VIH VIL Ileak Conditions Symbol VOH VOL Conditions Isource = 1 mA Isink = 1 mA Min. Typ. Max 400 100% VDD 20% VDD 0.1 Unit kHz V V µA Typ. Max 100% VDD 20% VDD Unit V V 80% VDD 0% VDD T = 25 °C DIGITAL OUTPUTS (SDA) Parameter Output high voltage Output low voltage TE CONNECTIVITY SENSORS /// MS5839-02BA Min. 80% VDD 0% VDD REV A4 09/2021 Page 3 MS5839-02BA Ultra-compact, chlorine resistant, digital pressure and temperature sensor TYPICAL PERFORMANCE CHARACTERISTICS RELATIVE PRESSURE ERROR AND TEMPERATURE ERROR VS PRESSURE AND TEMPERATURE (TYPICAL VALUES) TE CONNECTIVITY SENSORS /// MS5839-02BA REV A4 09/2021 Page 4 MS5839-02BA Ultra-compact, chlorine resistant, digital pressure and temperature sensor TYPICAL PERFORMANCE CHARACTERISTICS RELATIVE PRESSURE AND TEMPERATURE ERROR VS TEMPERATURE (1ST ORDER AND 2ND ORDER ALGORITHM, TYPICAL VALUES) RELATIVE PRESSURE AND TEMPERATURE ERROR VS POWER SUPPLY (TYPICAL VALUES) TE CONNECTIVITY SENSORS /// MS5839-02BA REV A4 09/2021 Page 5 MS5839-02BA Ultra-compact, chlorine resistant, digital pressure and temperature sensor PRESSURE AND TEMPERATURE CALCULATION GENERAL The MS5839 consists of a piezo-resistive sensor and a sensor interface integrated circuit. The main function of the MS5839 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 112bit PROM of each module. These bits (partitioned into 6 coefficients) must be read by the microcontroller software and used in the program converting D1 and D2 into compensated pressure and temperature values. COMMUNICATION INTERFACE The MS5839 has been built with I2C serial interface. Module ref Mode Pins used MS5839-02BA36 I2 C SDA, SCL The external microcontroller clocks in the data through the input SCL (Serial CLock) and SDA (Serial DAta). The sensor responds on the same pin SDA which is bidirectional for the I 2C bus interface. This interface type uses only 2 signal lines and does not require a chip select. TE CONNECTIVITY SENSORS /// MS5839-02BA REV A4 09/2021 Page 6 MS5839-02BA Ultra-compact, chlorine resistant, digital pressure and temperature sensor FIRST ORDER PRESSURE AND TEMPERATURE CALCULATION Start Maximum values for calculation results: PMIN = 10mbar PMAX = 2000mbar TMIN = -40°C TMAX = 85°C TREF = 20°C Read calibration data (factory calibrated) from PROM Variable Description | Equation Recommended variable type Size [1] [bit] min max Value Example / Typical C1 Pressure sensitivity | SENS T1 unsigned int 16 16 0 65335 46372 C2 Pressure offset | OFF T1 unsigned int 16 16 0 65335 43981 C3 Temperature coefficient of pressure sensitivity | TCS unsigned int 16 16 0 65335 29059 C4 Temperature coefficient of pressure offset | TCO unsigned int 16 16 0 65335 27842 C5 C6 Reference temperature | TREF Temperature coefficient of the temperature | TEMPSENS unsigned int 16 unsigned int 16 16 16 0 0 65335 65335 31553 28165 Read digital pressure and temperature data D1 Digital pressure value unsigned int 32 24 0 16777215 6464444 D2 Digital temperature value unsigned int 32 24 0 16777215 8077636 signed int 32 25 -16776960 16777216 68 signed int 32 25 -4000 8500 2000 = 20.00°C Calculate temperature dT TEMP Difference between actual and reference temperature [2] dT = D2 - T REF = D2 - C5 * 2 8 Actual temperature (-40…85°C with 0.01°C resolution) TEMP = 20°C + dT * TEMPSENS = 2000 + dT * C6 / 2 23 Calculate temperature compensated pressure Offset at actual temperature [2] OFF OFF = OFF T1 + TCO * dT = C2 * 2 17 + dT * C4 / 2 6 Sensitivity at actual temperature SENS SENS = SENS T1 + TCS * dT = C1 * 2 16 + dT * C3 / 2 7 P Temperature compensated pressure (10…1200mbar with 0.01mbar resolution) P = (D1 * SENS / 2 21 - OFF) / 2 signed int 64 41 -17179344900 25769410560 5764707214 signed int 64 41 -8589672450 12884705280 303950829 signed int 32 58 1000 120000 110002 = 1100.02 mbar [2] 15 Display pressure and temperature value Notes: [1] Maximal size of intermediate result during evaluation of variable [2] Min and max have to be defined Figure 1 : Pressure and temperature first order TE CONNECTIVITY SENSORS /// MS5839-02BA REV A4 09/2021 Page 7 MS5839-02BA Ultra-compact, chlorine resistant, digital pressure and temperature sensor SECOND ORDER TEMPERATURE COMPENSATION The results of the first order calculation are used as described in the following chart to obtain the 2 nd order pressure and temperature compensated values. Pressure and temperature values first order NO TEMP > 20°C YES High temperature Ti = 0 OFFi = 0 SENSi = 0 NO Very low temperature TEMP > 10°C YES Low temperature Ti = 14 * dT2 / 235 Ti = 12 * dT2 / 235 2 3 2 5 OFFi = 30 * (TEMP -2000) 2 / 28 SENSi = 0 OFFi = 35 * (TEMP -2000) / 2 SENSi = 63 * (TEMP-2000) / 2 Calculate pressure and temperature TEMP2 = (TEMP - Ti) / 100 OFF2 = OFF - OFFi SENS2 = SENS- SENSi Figure 2 : Second order compensation flowchart TE CONNECTIVITY SENSORS /// MS5839-02BA REV A4 09/2021 Page 8 MS5839-02BA Ultra-compact, chlorine resistant, digital pressure and temperature sensor I2C INTERFACE COMMANDS The MS5839 has only five basic commands: 1. Reset 2. Read PROM (112 bit of calibration words) 3. D1 conversion 4. D2 conversion 5. Read ADC result (24 bit pressure / temperature) Each I2C communication message starts with the start condition and it is ended with the stop condition. The MS5839 address is 1110110x (write: x=0, read: x=1). 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 16 bit results. 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 D1 (OSR=8192) Convert D2 (OSR=256) Convert D2 (OSR=512) Convert D2 (OSR=1024) Convert D2 (OSR=2048) Convert D2 (OSR=4096) Convert D2 (OSR=8192) ADC Read PROM Read Command byte 0 1 2 PRO CO M NV 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 0 0 1 1 0 0 0 0 0 0 1 1 1 1 1 1 0 0 1 0 0 0 0 1 1 0 0 0 0 1 1 0 Ad2 0 1 1 1 1 1 1 1 1 1 1 1 1 0 0 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 0 1 1 0 0 0 Ad1 1 0 1 0 1 0 1 0 1 0 1 0 1 0 Ad0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0x1E 0x40 0x42 0x44 0x46 0x48 0x4A 0x50 0x52 0x54 0x56 0x58 0x5A 0x00 0xA0 to 0xAE Command structure TE CONNECTIVITY SENSORS /// MS5839-02BA REV A4 09/2021 Page 9 MS5839-02BA Ultra-compact, chlorine resistant, digital pressure and temperature sensor 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 PROM from an unknown condition. 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 MS5839 to function is to send several SCLs followed by a reset sequence or to repeat power on reset. 1 1 1 0 1 1 0 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 I2C Reset Command 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 7 addresses resulting in a total memory of 112 bit. Addresses contain factory data and the setup, calibration coefficients, the serial code and CRC. The command sequence is 8 bits long with a 16 bit result which is clocked with the MSB first. 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 0 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 I2C Command to read memory address= 011 1 1 1 0 1 1 0 1 0 X X X X X X X X 0 X X X X X X X X 0 Device Address data data S Device Address R A Memory bit 15 - 8 A Memory bit 7 - 0 N P From Master From Slave S = Start Condition P = Stop Condition W = Write R = Read A = Acknowledge N = Not Acknowledage I2C answer from MS5839 TE CONNECTIVITY SENSORS /// MS5839-02BA REV A4 09/2021 Page 10 MS5839-02BA Ultra-compact, chlorine resistant, digital pressure and temperature sensor CONVERSION SEQUENCE The conversion command is used to initiate uncompensated pressure (D1) or uncompensated temperature (D2) conversion. 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. A conversion can be started by sending the command to MS5839. 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 is sent from the MS5839, 24 SCL cycles may be sent to receive all result bits. Every 8 bits the system waits for an acknowledge signal. 1 1 1 0 1 1 0 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 I2C command to initiate a pressure conversion (OSR=4096, typ=D1) 1 1 1 0 1 1 0 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 I2C ADC read sequence 1 1 1 0 1 1 0 1 0 X X X X X X X X 0 X X X X X X X X 0 X X X X X X X X 0 Device Address data data data S Device Address R A Data 23-16 A Data 15 - 8 A Data 7 - 0 N P From Master From Slave S = Start Condition P = Stop Condition W = Write R = Read A = Acknowledge N = Not Acknowledge I2C answer from MS5839 VERSION PROM WORD 0 PROGRAMMING For product type, the bits [11:5] of memory address 0 must be programmed with the following fixed values: MS5839-02BA36 Address 0 15 14 13 12 crc TE CONNECTIVITY SENSORS /// MS5839-02BA 11 0 10 1 9 0 8 0 7 1 6 0 5 0 4 3 2 1 factory settings REV A4 09/2021 0 Page 11 MS5839-02BA Ultra-compact, chlorine resistant, digital pressure and temperature sensor CYCLIC REDUNDANCY CHECK (CRC) MS5839 contains a PROM memory with 112-Bit. A 4-bit CRC has been implemented to check the data validity in memory. MS5839-02BA A d d D B 1 5 D B 1 4 0 1 2 3 4 5 6 D B 1 3 CRC 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 Version defined C1 C2 C3 C4 C5 C6 Factory defined Memory PROM mapping C Code example for CRC-4 calculation: unsigned char crc4(unsigned int n_prom[]) // n_prom defined as 8x unsigned int (n_prom[8]) { int cnt; // simple counter unsigned int n_rem=0; // crc remainder unsigned char n_bit; n_prom[0]=((n_prom[0]) & 0x0FFF); // CRC byte is replaced by 0 n_prom[7]=0; // Subsidiary value, set to 0 for (cnt = 0; cnt < 16; cnt++) // operation is performed on bytes { // choose LSB or MSB if (cnt%2==1) n_rem ^= (unsigned short) ((n_prom[cnt>>1]) & 0x00FF); else n_rem ^= (unsigned short) (n_prom[cnt>>1]>>8); for (n_bit = 8; n_bit > 0; n_bit--) { if (n_rem & (0x8000)) n_rem = (n_rem 12) & 0x000F); // final 4-bit remainder is CRC code return (n_rem ^ 0x00); } TE CONNECTIVITY SENSORS /// MS5839-02BA REV A4 09/2021 Page 12 MS5839-02BA Ultra-compact, chlorine resistant, digital pressure and temperature sensor APPLICATION CIRCUIT The MS5839 is a circuit that can be used in conjunction with a microcontroller in mobile altimeter applications. Figure: Typical application circuit PIN CONFIGURATION AND DEVICE PACKAGE OUTLINE UNLESS OTHERWISE SPECIFIED DIMENSIONS ARE IN MILLIMETERS. GENERAL TOLERANCE ± 0.1mm Product marking: Product description: xxxxxxxx Work order 9 digits: yyyyyyyyy 1 GND GROUND 2 VDD POSITIVE SUPPLY 3 SCL I2C CLOCK 4 SDA I2C DATA Figure: Package outlines and Pin configuration TE CONNECTIVITY SENSORS /// MS5839-02BA REV A4 09/2021 Page 13 MS5839-02BA Ultra-compact, chlorine resistant, digital pressure and temperature sensor RECOMMENDED PAD LAYOUT Pad layout for bottom side of the MS5839 soldered onto printed circuit board. Figure SHIPPING PACKAGE TE CONNECTIVITY SENSORS /// MS5839-02BA REV A4 09/2021 Page 14 MS5839-02BA Ultra-compact, chlorine resistant, digital pressure and temperature sensor MOUNTING AND ASSEMBLY CONSIDERATIONS SOLDERING Please refer to the application note AN808 available on our website for soldering recommendations. MOUNTING The MS5839 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. Gel must stay free of external physical contact when manipulation. 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 applications such as outdoor watches the electronics must be protected against direct water or humidity. For such applications the MS5839 provides the possibility to seal with an O-ring. The O-ring shall be placed at the groove location, i.e. the small outer diameter of the metal lid. The following O-ring / housing dimensions are recommended: O-ring inner diameter O-ring cross-section diameter Housing bore diameter 1.8 ± 0.05 mm 0.8 ± 0.03 mm 3.07 ± 0.03 mm Please refer to the application note AN523 available on our website for O-ring mounting recommendations. CLEANING The MS5839 has been manufactured under clean-room 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 “noclean” shall be used. Warning: cleaning might damage the sensor. ESD PRECAUTIONS The electrical contact pads are protected against ESD. It is therefore essential to ground machines and personnel properly during assembly and handling of the device. The MS5839 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 100nF minimum ceramic capacitor must be placed as close as possible to the MS5839 VDD pin. This capacitor will stabilize the power supply during data conversion and thus, provide the highest possible accuracy. TE CONNECTIVITY SENSORS /// MS5839-02BA REV A4 09/2021 Page 15 MS5839-02BA Ultra-compact, chlorine resistant, digital pressure and temperature sensor ORDERING INFORMATION PART NUMBER DESCRIPTION 20008669-50 MS5839-02BA36 CL RESISTANT LS T&R SEN SHIELDING CHLORINE RESISTANT X X NORTH AMERICA EUROPE ASIA Tel +1 800 522 6752 customercare.frmt@te.com Tel +31 73 624 6999 customercare.bevx@te.com Tel +86 0400 820 6015 customercare.shzn@te.com te.com/sensorsolutions 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. © 2019 TE Connectivity Ltd. family of companies All Rights Reserved. TE CONNECTIVITY SENSORS /// MS5839-02BA REV A4 09/2021 Page 16