`
`MS5637-02BA03 Low Voltage Barometric Pressure Sensor
`
`
`
`
`
`DESCRIPTION
`
`
`• QFN package 3 x 3 x 0.9 mm3
`• High-resolution module, 13 cm
`• Supply voltage: 1.5 to 3.6 V
`• Fast conversion down to 0.5 ms
`• Low power, 0.6 µA (standby ≤ 0.1 µA at 25°C)
`Integrated digital pressure sensor (24 bit ΔΣ ADC)
`•
`• Operating range: 300 to 1200 mbar, -40 to +85 °C
`I2C interface
`•
`• No external components (internal oscillator)
`
`
`
`The MS5637 is an ultra-compact micro altimeter. It is optimized for altimeter and barometer applications in
`Smart-phones and Tablet PCs. The altitude resolution at sea level is 13 cm of air. 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 MS5637 can be
`interfaced to any microcontroller with I2C-bus interface. The communication protocol is simple, without the need
`of programming internal registers in the device. Small dimensions of 3 x 3 x 0.9 mm3 allow the integration in
`mobile devices. This new sensor module generation is based on leading MEMS technology and latest benefits
`from MEAS Switzerland proven experience and know-how in high volume manufacturing of altimeter modules,
`which has been widely used for over a decade. The sensing principle employed leads to very low hysteresis and
`high stability of both pressure and temperature signal.
`
`FEATURES
`
`FIELD OF APPLICATION
`Smart-phones
`Tablet PCs
`Personal navigation devices
`
`TECHNICAL DATA
`Sensor Performances (VDD = 3 V)
`Pressure
`Min
`Maximum Range
`10
`ADC
`
`FUNCTIONAL BLOCK DIAGRAM
`
`Resolution (1)
`
`mbar
`
`Unit
`Typ Max
`2000 mbar
`
`24
`bit
`0.11 / 0.062/ 0.039
`/ 0.028 / 0.021 /
`0.016
`
`
`-2
`
`+2
`
`mbar
`
`Error band at 25°C,
`300 to 1200 mbar
`Error band, -20°C to + 85°C
`300 to 1200 mbar (2)
`Response time (1)
`
`SENSOR
`
`+IN
`
`-IN
`
`SGND
`
`I2C Bus
`Interface
`
`ADC
`
`dig.
`Filter
`
`Sensor
`Interface IC
`
`Memory
`(PROM)
`112 bits
`
`
`
`VDD
`
`SDA
`
`SCL
`
`GND
`
`mbar
`
`ms
`
`+4
`
`-4
`0.5 / 1.1 / 2.1 / 4.1 /
`8.22 / 16.44
` mbar/yr
`±1
`
`Long term stability
`Typ Max
`Unit
`Min
`Temperature
`
`+85
`°C
`-40
`Range
`<0.01
`
`°C
`
`Resolution
`
`+1
`°C
`-1
`Accuracy at 25°C
`Notes: (1) Oversampling Ratio: 256 / 512 / 1024 / 2048 / 4096 / 8192
` (2) With auto-zero at one pressure point
`
`DA5637-02BA03_006
`000056372111 ECN1978
`
`www.meas-spec.com
`1/16
`
`May 22, 2013
`
`
`
`
`
`NJOY Exhibit 1020.001
`
`

`

`MS5637-02BA03 Low Voltage Barometric Pressure Sensor
`
`MS5637
`
`
`PERFORMANCE SPECIFICATIONS
`
`ABSOLUTE MAXIMUM RATINGS
`Parameter
`Symbol Conditions
`Supply voltage
`VDD
`
`Storage temperature
`TS
`
`Overpressure
`Pmax
`
`Maximum Soldering
`Temperature
`
`40 sec max
`
`Tmax
`
`ESD rating
`
`Latch up
`
`
`
`
`
`
`
`
`Human Body
`Model
`JEDEC standard
`No 78
`
`Min.
`-0.3
`-20
`
`
`
`
`-2
`
`-100
`
`Typ.
`
`
`6
`
`
`
`
`
`
`
`Max.
`+3.6
`+85
`
`
`250
`
`+2
`
`Unit
`V
`°C
`bar
`
`°C
`
`kV
`
`+100
`
`mA
`
`ELECTRICAL CHARACTERISTICS
`Parameter
`Symbol
`Operating Supply voltage
`VDD
`Operating Temperature
`T
`
`Supply current
`(1 sample per sec.)
`
`Peak supply current
`Standby supply current
`VDD Capacitor
`
`IDD
`
`
`
`
`
`
`
`
`
`Min.
`Conditions
` 1.5
`
`-40
`
`OSR 8192
`4096
`2048
`1024
`512
`256
`during conversion
`at 25°C (VDD = 3.0 V)
`from VDD to GND
`
`
`
`100
`
`
`
`ANALOG DIGITAL CONVERTER (ADC)
`Parameter
`Symbol Conditions
`Output Word
`
`
`OSR 8192
`4096
`2048
`1024
`512
`256
`
`Conversion time
`
`tc
`
`Min.
`
`
`
`
`Max.
`3.6
` +85
`
`Unit
`V
`°C
`
`
`
`µA
`
`
`0.1
`
`
`mA
`µA
`nF
`
`Max.
`
`
`Unit
`bit
`
`
`
`ms
`
`Typ.
`3.0
` +25
`20.09
`10.05
`5.02
`2.51
`1.26
`0.63
`1.25
`0.01
`470
`
`Typ.
`24
`16.44
`8.22
`4.13
`2.08
`1.06
`0.54
`
`
`
`DA5637-02BA03_006
`000056372111 ECN1978
`
`www.meas-spec.com
`2/16
`
`May 22, 2013
`
`NJOY Exhibit 1020.002
`
`

`

`MS5637-02BA03 Low Voltage Barometric Pressure Sensor
`
`MS5637
`
`
`PERFORMANCE SPECIFICATIONS (CONTINUED)
`
`PRESSURE OUTPUT CHARACTERISTICS (VDD = 3.0 V, T = 25 °C UNLESS OTHERWISE NOTED)
`Parameter
`Conditions
`Min.
`Typ.
`Max.
`Unit
`Operating Pressure Range
`Prange
`
`300
`
`1200
`mbar
`Linear Range of
`ADC
`
`10
`
`
`
`2000
`
`mbar
`
`Extended Pressure Range
`
`Pext
`
`Relative Accuracy, autozero at
`one pressure point (1)
`
`700…1000 mbar at 25°C
`
`300..1200 mbar at 25°C
`300..1200mbar, -20..85°C
`OSR 8192
`4096
`2048
`1024
`512
`256
`
`VDD = 1.5 V … 3.6 V
`
`
`
`-2
`-4
`
`
`
`
`
`
`
`±0.1
`
`
`0.016
`0.021
`0.028
`0.039
`0.062
`0.11
`
`±0.5
`
`
`
`+2
`+4
`
`
`
`
`
`mbar
`
`mbar
`
`mbar
`
`mbar
`
`Absolute Accuracy,
`no autozero
`
`Resolution RMS
`
`Maximum error with supply
`voltage
`Long-term stability
`
`Reflow soldering impact
`
`
`
`
`
`
`
`±1
`
`-1
`
`3
`
`
`
`
`
`
`
`mbar/yr
`
`mbar
`
`days
`
`
`IPC/JEDEC J-STD-020C
`(See application note AN808
`on http://meas-spec.com)
`
`Recovering time after reflow (2)
`(1) Characterized value performed on qualification devices
`(2) Recovering time at least 66% of the reflow impact
`
`
`TEMPERATURE OUTPUT CHARACTERISTICS (VDD = 3 V, T = 25°C UNLESS OTHERWISE NOTED)
`Parameter
`Conditions
`Min.
`Typ.
`Max.
`Unit
`at 25°C
`-1
`
`+1
`Absolute Accuracy
`°C
`-20..85°C
`-2
`
`+2
`
`Maximum error with supply
`voltage
`
`Resolution RMS
`
`
`
`VDD = 1.5 V … 3.6 V
`
`
`
`±0.3
`
`0.002
`OSR 8192
`0.003
`4096
`0.004
`2048
`0.006
`1024
`0.009
`512
`256
`0.012
`
`
`
`
`
`
`
`°C
`
`°C
`
`DA5637-02BA03_006
`000056372111 ECN1978
`
`www.meas-spec.com
`3/16
`
`May 22, 2013
`
`NJOY Exhibit 1020.003
`
`

`

`MS5637-02BA03 Low Voltage Barometric Pressure Sensor
`
`MS5637
`
`
`PERFORMANCE SPECIFICATIONS (CONTINUED)
`
`DIGITAL INPUTS (SDA, SCL)
`Parameter
`Serial data clock
`Input high voltage
`Input low voltage
`Input leakage current
`Input capacitance
`
`
`
`DIGITAL OUTPUTS (SDA)
`Parameter
`Output high voltage
`Output low voltage
`Load capacitance
`
`Symbol Conditions
`SCL
`
`VIH
`
`VIL
`
`Ileak
`CIN
`
`
`
`T = 25 °C
`
`Symbol Conditions
`VOH
`Isource = 1 mA
`VOL
`Isink = 1 mA
`CLOAD
`
`
`Min.
`
`80% VDD
`0% VDD
`
`
`
`Min.
`80% VDD
`0% VDD
`
`
`Typ.
`
`
`
`
`6
`
`Typ.
`
`
`16
`
`Unit
`Max.
`kHz
`400
`100% VDD V
`20% VDD
`V
`0.1
`µA
`
`pF
`
`Unit
`Max.
`100% VDD V
`20% VDD
`V
`
`pF
`
`DA5637-02BA03_006
`000056372111 ECN1978
`
`www.meas-spec.com
`4/16
`
`May 22, 2013
`
`NJOY Exhibit 1020.004
`
`

`

`MS5637-02BA03 Low Voltage Barometric Pressure Sensor
`
`MS5637
`
`
`FUNCTIONAL DESCRIPTION
`
`SENSOR
`
`+IN
`
`-IN
`
`SGND
`
`I2C Bus
`Interface
`
`ADC
`
`dig.
`Filter
`
`Sensor
`Interface IC
`
`Memory
`(PROM)
`112 bits
`
`
`
`
`Figure 1: Block diagram
`
`VDD
`
`SDA
`
`SCL
`
`GND
`
`
`
`GENERAL
`The MS5637 consists of a piezo-resistive sensor and a sensor interface integrated circuit. The main function of
`the MS5637 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
`112-bit 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.
`
`SERIAL I2C INTERFACE
`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 I2C bus interface. So this interface type uses
`only 2 signal lines and does not require a chip select.
`
`
`
`
`
`
`Module reference Mode
`I2C
`MS563702BA03
`
`Pins used
`SDA, SCL
`
`DA5637-02BA03_006
`000056372111 ECN1978
`
`www.meas-spec.com
`5/16
`
`May 22, 2013
`
`NJOY Exhibit 1020.005
`
`

`

`MS5637-02BA03 Low Voltage Barometric Pressure Sensor
`
`MS5637
`
`
`
`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
`Convert calibration data into coefficients (see bit pattern of W1 to W4)
`
`Variable
`
`Description | Equation
`
`Pressure sensitivity | SENST1
`Pressure offset | OFFT1
`Temperature coefficient of pressure sensitivity | TCS
`Temperature coefficient of pressure offset | TCO
`Reference temperature | TREF
`Temperature coefficient of the temperature | TEMPSENS
`
`C1
`C2
`C3
`C4
`C5
`C6
`
`D1
`D2
`
`Recommended
`variable type
`
`unsigned int 16
`unsigned int 16
`unsigned int 16
`unsigned int 16
`unsigned int 16
`unsigned int 16
`
`Size [1]
`[bit]
`16
`16
`16
`16
`16
`16
`
`Value
`
`max
`65535
`65535
`65535
`65535
`65535
`65535
`
`Example /
`Typical
`
`46372
`43981
`29059
`27842
`31553
`28165
`
`16777216
`16777216
`
`6465444
`8077636
`
`min
`0
`0
`0
`0
`0
`0
`
`0
`0
`
`Read digital pressure and temperature data
`Read digital pressure and temperature data
`
`Digital pressure value
`Digital temperature value
`
`unsigned int 32
`unsigned int 32
`
`24
`24
`
`Calculate temperature
`
`dT
`
`TEMP
`
`Difference between actual and reference temperature [2]
`dT = D2 - TREF = D2 - C5 * 2 8
`Actual temperature (-40…85°C with 0.01°C resolution)
`TEMP = 20°C + dT * TEMPSENS = 2000 + dT * C6 / 223
`
`signed int 32
`
`signed int 32
`
`25
`
`41
`
`-16776960
`
`16777216
`
`68
`
`-4000
`
`8500
`
`2000
`= 20.00 °C
`
`Calculate temperature compensated pressure
`Calculate temperature compensated pressure
`
`Offset at actual temperature [3]
`OFF = OFFT1 + TCO * dT = C2 * 217 + (C4 * dT ) / 26
`
`Sensitivity at actual temperature [4]
` + (C3 * dT ) / 27
`SENS = SENST1 + TCS * dT = C1 * 2 16
`Temperature compensated pressure (10…1200mbar with
`0.01mbar resolution)
`P = D1 * SENS - OFF = (D1 * SENS / 2 21 - OFF) / 2 15
`
`signed int 64
`
`signed int 64
`
`signed int 32
`
`41
`
`41
`
`58
`
`-17179344900
`
`25769410560
`
`5764707214
`
`-8589672450
`
`12884705280
`
`3039050829
`
`1000
`
`120000
`
`110002
`
`= 1100.02 mbar
`
`Display pressure and temperature value
`
`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.
`
`
`
`OFF
`
`SENS
`
`P
`
`Notes
`[1]
`[2]
`[3]
`[4]
`
`
`
`DA5637-02BA03_006
`000056372111 ECN1978
`
`www.meas-spec.com
`6/16
`
`May 22, 2013
`
`NJOY Exhibit 1020.006
`
`

`

`MS5637-02BA03 Low Voltage Barometric Pressure Sensor
`
`MS5637
`
`
`
`SECOND ORDER TEMPERATURE COMPENSATION
`In order to obtain best accuracy over temperature range, particularly at low temperature, it is recommended to
`compensate the non-linearity over the temperature. This can be achieved by correcting the calculated
`temperature, offset and sensitivity by a second-order correction factor. The second-order factors are calculated
`as follows:
`
`
`
`Yes
`
`No
`
`High temperature
`T2 = T2 = 5 ⋅ dT 2 / 2 38
`OFF2 = 0
`
`SENS2 = 0
`
`
`No
`
`
`
`TEMP<20°C
`
`
`
`
`
`
`
`
`
`
`
`
`
`
`
`
`
`
`
`
`
`
`
`
`
`
`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.
`
`Low temperature
`Low temperature
`T2 = 3 ⋅ dT 2 / 2 33
`OFF2 = 61 ⋅ (TEMP – 2000)2 / 24
`SENS2 = 29 ⋅ (TEMP – 2000)2/ 24
`
`Yes
`
`TEMP<-15°C
`
`Low temperature
`Very low temperature
`OFF2 = OFF2 + 17 ⋅ (TEMP + 1500)2
`SENS2 = SENS2 + 9 ⋅ (TEMP + 1500)2
`
`
`
`
`
`DA5637-02BA03_006
`000056372111 ECN1978
`
`www.meas-spec.com
`7/16
`
`May 22, 2013
`
`NJOY Exhibit 1020.007
`
`

`

`MS5637-02BA03 Low Voltage Barometric Pressure Sensor
`
`MS5637
`
`
`I2C INTERFACE
`
`COMMANDS
`The MS5637 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
`MS5637 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.
`
`
`
`hex value
`
`
`
`
`0x1E
`0x40
`0x42
`0x44
`0x46
`0x48
`0x4A
`0x50
`0x52
`0x54
`0x56
`0x58
`0x5A
`0x00
`0xA0 to
`0xAE
`
`
`Bit number
`Bit name
`
`Command byte
`0
`1
`2
`PRO
`CO
`-
`M
`NV
`
`
`Command
`0
`0
`Reset
`0
`1
`Convert D1 (OSR=256)
`0
`1
`Convert D1 (OSR=512)
`Convert D1 (OSR=1024) 0
`1
`Convert D1 (OSR=2048) 0
`1
`Convert D1 (OSR=4096) 0
`1
`Convert D1 (OSR=8192) 0
`1
`Convert D2 (OSR=256)
`0
`1
`Convert D2 (OSR=512)
`0
`1
`Convert D2 (OSR=1024) 0
`1
`Convert D2 (OSR=2048) 0
`1
`Convert D2 (OSR=4096) 0
`1
`Convert D2 (OSR=8192) 0
`1
`ADC Read
`0
`0
`PROM Read
`1
`0
`
`7
`Stop
`
`6
`5
`4
`3
`Ad0/
`Ad1/
`Typ Ad2/
`Os0
`Os1
`Os2
`
`
`
`
`0
`1
`1
`1
`0
`0
`0
`0
`0
`1
`0
`0
`0
`0
`1
`0
`0
`1
`1
`0
`0
`0
`0
`1
`0
`1
`0
`1
`0
`0
`0
`0
`0
`1
`0
`0
`0
`0
`1
`0
`0
`1
`1
`0
`0
`0
`0
`1
`0
`1
`0
`1
`0
`0
`0
`0
`Ad2 Ad1 Ad0 0
`
`
`1
`0
`0
`0
`0
`0
`0
`1
`1
`1
`1
`1
`1
`0
`0
`
`
`0
`0
`0
`0
`0
`0
`0
`0
`0
`0
`0
`0
`0
`0
`1
`
`
`
`
`
`Figure 4: Command structure
`
`DA5637-02BA03_006
`000056372111 ECN1978
`
`www.meas-spec.com
`8/16
`
`May 22, 2013
`
`NJOY Exhibit 1020.008
`
`

`

`MS5637-02BA03 Low Voltage Barometric Pressure Sensor
`
`MS5637
`
`
`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 MS5637 to function
`is to send several SCLs followed by a reset sequence or to repeat power on reset.
`
`
`S
`
`
`
`1 1 1 0 1 1 0 0 0 0 0 0 1 1 1 1 0 0
`Device Address
`command
`cmd byte
`Device Address
`
`W A
`
`A P
`
`From Master
`From Slave
`
`S = Start Condition
`P = Stop Condition
`
`W = Write
`R = Read
`
`
`Figure 5: I2C Reset Command
`
`A = Acknowledge
`N = Not Acknowledge
`
`
`
`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 contains 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
`Device Address
`cmd byte
`
`W A
`
`A P
`
`From Master
`From Slave
`
`S = Start Condition
`P = Stop Condition
`
`W = Write
`R = Read
`
`A = Acknowledge
`N = Not Acknowledge
`
`
`Figure 6: 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
`Memory bit 7 - 0
`Device Address
`Memory bit 15 - 8
`
`R A
`
`A
`
`N P
`
`
`
`S
`
`S
`
`From Master
`From Slave
`
`S = Start Condition
`P = Stop Condition
`
`W = Write
`R = Read
`
`A = Acknowledge
`N = Not Acknowledage
`
`
`
`
`Figure 7: I2C answer from MS5637
`
`
`
`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 MS5637.
`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 MS5637, 24 SCL
`cycles may be sent to receive all result bits. Every 8 bits the system waits for an acknowledge signal.
`
`
`
`
`DA5637-02BA03_006
`000056372111 ECN1978
`
`www.meas-spec.com
`9/16
`
`May 22, 2013
`
`NJOY Exhibit 1020.009
`
`

`

`MS5637-02BA03 Low Voltage Barometric Pressure Sensor
`
`MS5637
`
`
`1 1 1 0 1 1 0 0 0 0 1 0 0 1 0 0 0 0
`Device Address
`command
`cmd byte
`Device Address
`
`W A
`
`A P
`
`S
`
`From Master
`From Slave
`
`S = Start Condition
`P = Stop Condition
`
`W = Write
`R = Read
`
`A = Acknowledge
`N = Not Acknowledge
`
`
`
`Figure 8: 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
`Device Address
`cmd byte
`
`S
`
`W A
`
`A P
`
`From Master
`From Slave
`
`S = Start Condition
`P = Stop Condition
`
`W = Write
`R = Read
`
`A = Acknowledge
`N = Not Acknowledge
`
`
`
`
`Figure 9: 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
`Data 7 - 0
`Data 8 - 15
`Device Address
`Data 23-16
`
`S
`
`R A
`
`A
`
`A
`
`From Master
`From Slave
`
`S = Start Condition
`P = Stop Condition
`
`W = Write
`R = Read
`
`A = Acknowledge
`N = Not Acknowledge
`
`
`
`Figure 10: I2C answer from MS5637
`
`
`
`
`
`CYCLIC REDUNDANCY CHECK (CRC)
`
`N P
`
`
`
`MS5637 contains a PROM memory with 112-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.
`
`
`
`DB13
`
`DB14
`
`
`
`CRC
`
`DB0
`
`
`
`DB1
`
`
`
`DB2
`
`
`
`DB3
`
`DB4
`
`DB5
`
`DB6
`
`DB7
`
`DB8
`
`DB9
`
`
`
`
`
`
`
`
`
`Factory defined
`C1
`C2
`C3
`C4
`C5
`C6
`
`DB10
`
`
`
`DB11
`
`
`
`DB12
`
`
`
`DB15
`
`
`
`A
`d
`d
`0
`1
`2
`3
`4
`5
`6
`
`
`Figure 11: Memory PROM mapping
`
`DA5637-02BA03_006
`000056372111 ECN1978
`
`www.meas-spec.com
`10/16
`
`May 22, 2013
`
`NJOY Exhibit 1020.010
`
`

`

`MS5637-02BA03 Low Voltage Barometric Pressure Sensor
`
`MS5637
`
`
`APPLICATION CIRCUIT
`
`The MS5637 is a circuit that can be used in conjunction with a microcontroller in mobile altimeter applications.
`
`
`
`
`
`Figure 12: Typical application circuit
`
`
`
`DA5637-02BA03_006
`000056372111 ECN1978
`
`www.meas-spec.com
`11/16
`
`May 22, 2013
`
`NJOY Exhibit 1020.011
`
`

`

`MS5637-02BA03 Low Voltage Barometric Pressure Sensor
`
`MS5637
`
`PIN CONFIGURATION
`
`Pin Name
`1
`VDD
`
`Type Function
`P
`Positive supply voltage
`
`2
`
`3
`
`4
`
`SDA
`
`SCL
`
`GND
`
`I/O
`
`I2C data
`
`I
`
`I
`
`I2C clock
`
`Ground
`
`
`DEVICE PACKAGE OUTLINE
`
`
`
`
`
`
`
`
`
`
`
`
`
`
`Notes:
`
`
`
`(1) Dimensions in mm
`(2) General tolerance: ±0.1
`
`Figure 13: MS5637 package outline
`
`
`
`DA5637-02BA03_006
`000056372111 ECN1978
`
`www.meas-spec.com
`12/16
`
`May 22, 2013
`
`NJOY Exhibit 1020.012
`
`

`

`MS5637-02BA03 Low Voltage Barometric Pressure Sensor
`
`MS5637
`
`
`RECOMMENDED PAD LAYOUT
`
`Pad layout for bottom side of the MS5637 soldered onto printed circuit board.
`
`
`
`
`
`
`
`
`
`
`
`
`
`
`
`
`
`
`Figure 14: MS5637 pad layout
`
`
`
`SHIPPING PACKAGE
`
`Reserved area:
`Please do not route
`tracks between pads
`
`
`Tape and Tape and reel
`
`DA5637-02BA03_006
`000056372111 ECN1978
`
`www.meas-spec.com
`13/16
`
`May 22, 2013
`
`NJOY Exhibit 1020.013
`
`

`

`MS5637-02BA03 Low Voltage Barometric Pressure Sensor
`
`MS5637
`
`
`MOUNTING AND ASSEMBLY CONSIDERATIONS
`
`SOLDERING
`Please refer to the application note AN808 available on our website for all soldering issues.
`
`MOUNTING
`The MS5637 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.
`
`CLEANING
`The MS5637 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 “no-clean” shall be used. Cleaning might damage the sensor!
`
`ESD PRECAUTIONS
`The electrical contact pads are protected against ESD up to 2 kV HBM (human body model). It is therefore
`essential to ground machines and personnel properly during assembly and handling of the device.
`The MS5637 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 MS5637 VDD pin. This capacitor will stabilize the power
`supply during data conversion and thus, provide the highest possible accuracy.
`
`DA5637-02BA03_006
`000056372111 ECN1978
`
`www.meas-spec.com
`14/16
`
`May 22, 2013
`
`NJOY Exhibit 1020.014
`
`

`

`MS5637-02BA03 Low Voltage Barometric Pressure Sensor
`
`MS5637
`
`
`TYPICAL PERFORMANCE CHARACTERISTICS
`
`
`PRESSURE AND TEMPERATURE ERROR VERSUS PRESSURE AND TEMPERATURE
`(TYPICAL VALUES)
`
`
`
`
`
`
`
`PRESSURE AND TEMPERATURE ERROR VERSUS POWER SUPPLY
` (TYPICAL VALUES)
`
`
`
`DA5637-02BA03_006
`000056372111 ECN1978
`
`www.meas-spec.com
`15/16
`
`May 22, 2013
`
`NJOY Exhibit 1020.015
`
`

`

`MS5637-02BA03 Low Voltage Barometric Pressure Sensor
`
`MS5637
`
`
`ORDERING INFORMATION
`
`Product Code
`MS5637-02BA03
`
`Product
`Micro Altimeter Module 3x3mm
`
`Art. No
`MS563702BA03-50
`
`Delivery Form
`Tape and reel
`
`
`FACTORY CONTACTS
`
`EUROPE
`
`MEAS 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.
`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
`
`
`NORTH AMERICA
`
`Measurement Specialties
`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
`
`
`
`
`
`The information in this sheet has been carefully reviewed and is believed to be accurate; however, no responsibility is assumed for
`inaccuracies. Furthermore, this information does not convey to the purchaser of such devices any license under the patent rights to the
`manufacturer. Measurement Specialties, Inc. reserves the right to make changes without further notice to any product herein. Measurement
`Specialties, Inc. makes no warranty, representation or guarantee regarding the suitability of its product for any particular purpose, nor does
`Measurement Specialties, Inc. assume any liability arising out of the application or use of any product or circuit and specifically disclaims
`any and all liability, including without limitation consequential or incidental damages. Typical parameters can and do vary in different
`applications. All operating parameters must be validated for each customer application by customer’s technical experts. Measurement
`Specialties, Inc. does not convey any license under its patent rights nor the rights of others.
`
`
`
`
`DA5637-02BA03_006
`000056372111 ECN1978
`
`www.meas-spec.com
`16/16
`
`May 22, 2013
`
`NJOY Exhibit 1020.016
`
`