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datasheet.eeworld.com.cn_maxim_integrated_201907113870623.pdf

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    General Description The MAX30205 temperature sensor accurately measures temperature and provide an overtemperature alarm/ interrupt/shutdown output. This device converts the temperature measurements to digital form using a high- resolution, sigma-delta, analog-to-digital converter (ADC). Accuracy meets clinical thermometry specification of the ASTM E1112 when soldered on the final PCB. Communication is through an I2C-compatible, 2-wire serial interface. The I2C serial interface accepts standard write byte, read byte, send byte, and receive byte commands to read the temperature data and configure the behavior of the open- drain overtemperature shutdown output. The MAX30205 features three address select lines with a total of 32 available addresses. The sensor has a 2.7V to 3.3V supply voltage range, low 600µA supply current, and a lockup-protected I2C-compatible interface that make it ideal for wearable fitness and medical applications. This device is available in an 8-pin TDFN package and operates over the 0NC to +50NC temperature range. Applications ● Fitness ● Medical Typical Application Circuit Benefits and Features ● High Accuracy and Low-Voltage Operation Aids Designers in Meeting Error and Power Budgets • 0.1°C Accuracy (37°C to 39°C) • 16-Bit (0.00390625°C) Temperature Resolution • 2.7V to 3.3V Supply Voltage Range ● One-Shot and Shutdown Modes Help Reduce Power Usage ● 600μA (typ) Operating Supply Current ● Digital Functions Make Integration Easier into Any System • Selectable Timeout Prevents Bus Lockup • Separate Open-Drain OS Output Operates as Interrupt or Comparator/Thermostat Output Ordering Information appears at end of data sheet. 4.7kΩ TO I2C MASTER +2.7V TO +3.3V MAX30205 SDA SCL OS GND VDD A0 A1 A2 0.1µF 19-8505; Rev 0; 3/16 MAX30205Human Body Temperature Sensor
    Absolute Maximum Ratings (All voltages relative to GND.) Voltage Range on VDD, SDA, SCL, A0, A1 ............-0.3V to +4V Voltage Range on A2, OS ........................ -0.3V to (VDD + 0.3V) Input Current at Any Pin ....................................................+5mA Package Input Current ....................................................+20mA Continuous Power Dissipation (TA = +70°C) TDFN (derate 24.4mW/NC above +70°C) ...............1951.2mW ESD Protection (All Pins, Human Body Model) (Note 1) ... ±4000V Operating Temperature Range ...............................0NC to +50°C Junction Temperature ........................................................+50°C Storage Temperature Range .............................. -10NC to +50°C Lead Temperature (soldering, 10s) .................................+300°C Soldering Temperature (reflow) ......................................+260°C Note 1: Human Body Model, 100pF discharged through a 1.5kI resistor. Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. Package Thermal Characteristics (Note 2) TDFN Junction-to-Ambient Thermal Resistance (θJA) ..........41°C/W Junction-to-Case Thermal Resistance (θJC) .................8°C/W Note 2: Package thermal resistances were obtained using the method described in JEDEC specification JESD51-7, using a four-layer board. For detailed information on package thermal considerations, refer to www.maximintegrated.com/thermal-tutorial. Recommended Operating Conditions (TA = 0°C to +50°C, unless otherwise noted.) (Notes 3, 4) PARAMETER SYMBOL CONDITIONS Operating Supply Voltage Input High Voltage Input Low Voltage VDD VIH VIL MIN 2.7 TYP 3.0 MAX 3.3 VDD x 0.7 VDD x 0.3 UNITS V V V Electrical Characteristics (VDD = 2.7V to 3.3V, TA = 0°C to +50°C, unless otherwise noted. Typical values are VDD = 3.0V, TA = +25NC.) (Note 3) PARAMETER SYMBOL CONDITIONS Thermometer Error (Note 5) TERR ADC Repeatability Temperature Data Resolution Conversion Time First Conversion Completed Trepeat 0°C to +15°C +15°C to +35.8°C +35.8°C to +37°C +37°C to +39°C +39°C to +41°C +41°C to +45°C +45°C to +50°C 1 Sigma Data ready after POR MIN -0.5 -0.3 -0.2 -0.1 -0.2 -0.3 -0.5 TYP 0.009 16 44 MAX +0.5 +0.3 +0.2 +0.1 +0.2 +0.3 +0.5 50 50 UNITS °C °C Bits ms ms Maxim Integrated │ 2 www.maximintegrated.comMAX30205Human Body Temperature Sensor
    Electrical Characteristics (continued) (VDD = 2.7V to 3.3V, TA = 0°C to +50°C, unless otherwise noted. Typical values are VDD = 3.0V, TA = +25NC.) (Note 3) PARAMETER SYMBOL CONDITIONS MIN TYP 600 1.65 80 75 2.26 130 0.005 0.005 5 MAX 925 3.5 6 UNITS µA Conversions °C °C V mV µA µA pF µA V V 1 1 1 0.8 0.4 I2C inactive, TA = 0°C to +50°C Shutdown mode, I2C inactive, TA = 0°C to +50°C Depends on fault queue setting Factory default setting Factory default setting 1 Quiescent Supply Current IDD OS Delay TOS Default Temperature THYST Default Temperature POR Voltage Threshold POR Hysteresis Input-High Leakage Current Input-Low Leakage Current Input Capacitance Output-High Leakage Current OS Output Saturation Voltage Output Low Voltage IIH IIL VIN = 3.3V (all digital inputs) VIN = 0V (all digital inputs ) All digital inputs VIN = 3.3V (SDA and OS) IOUT = 4.0mA IOL = 3mA (SDA) I2C AC Electrical Characteristics (VDD = 2.7V to 3.3V, TA = 0°C to +50°C, unless otherwise noted. Typical values are VDD = 3.0V, TA = +25°C.) (Notes 3, 6) (Figure 1) UNITS kHz CONDITIONS MAX 400 SYMBOL TYP MIN DC PARAMETER Serial Clock Frequency Bus Free Time Between STOP and START Conditions START Condition Hold Time STOP Condition Setup Time Clock Low Period Clock High Period START Condition Setup Time Data Setup Time Data Out Hold Time Data In Hold Time Maximum Receive SCL/SDA Rise Time Minimum Receive SCL/SDA Rise Time Maximum Receive SCL/SDA Fall Time Minimum Receive SCL/SDA Fall Time fSCL (Note 7) 1.3 0.6 600 1.3 0.6 100 100 100 0 tBUF tHD:STA tSU:STO tLOW tHIGH tSU:STA tSU:DAT tDH tHD:DAT tR tR tF tF 90% of SCL to 10% of SDA 90% of SCL to 90% of SDA 10% of SDA to 10% of SCL (Note 8) 10% of SCL to 10% of SDA (Note 8) (Note 9) (Note 9) (Note 9) (Note 9) 0.9 300 20 + 0.1CB 300 20 + 0.1CB Fs Fs ns Fs Fs ns ns ns Fs ns ns ns ns Maxim Integrated │ 3 www.maximintegrated.comMAX30205Human Body Temperature Sensor
    I2C AC ELECTRICAL CHARACTERISTICS (continued) (VDD = 2.7V to 3.3V, TA = 0°C to +50°C, unless otherwise noted. Typical values are VDD = 3.0V, TA = +25°C.) (Notes 3, 6) (Figure 1) UNITS CONDITIONS PARAMETER TYP MAX SYMBOL Transmit SDA Fall Time Pulse Width of Suppressed Spike SDA Time Low for Reset of Serial Interface tF tSP (Note 9) (Note 10) tTIMEOUT (Note 7) MIN 20 + 0.1CB 0 45 50 250 50 55 ns ns ms Note 3: Limits are 100% production tested at TA = +25NC. Limits over the operating temperature range and relevant supply voltage range are guaranteed by design and characterization. Typical values are not guaranteed. Note 4: All voltages are referenced to ground. Currents entering the IC are specified positive. Note 5: These limits represent a 6-sigma distribution of shipped devices and a 3-sigma distribution when these devices are sol- dered down on the PCB. Sample period > 10s to eliminate self-heating effects. Note 6: All timing specifications are guaranteed by design. Note 7: Holding the SDA line low for a time greater than tTIMEOUT causes the devices to reset SDA to the idle state of the serial Note 8: A master device must provide a hold time of at least 300ns for the SDA signal to bridge the undefined region of SCL’s fall- bus communication (SDA released). ing edge. Note 9: CB = total capacitance of one bus line in pF. Tested with CB = 400pF. Note 10: Input filters on SDA and SCL suppress noise spikes less than 50ns. SDA SCL tBUF tLOW tHD:STA tR tF tHIGH STOP START NOTE: TIMING IS REFERENCED TO VIL(MAX) AND VIH(MIN). tHD:DAT tSU:DAT Figure 1. I2C Timing Diagram tHD:STA tSP tSU:STA REPEATED START tSU:STO Maxim Integrated │ 4 www.maximintegrated.comMAX30205Human Body Temperature Sensor
    Typical Operating Characteristics (TA = +25°C, unless otherwise noted.) 750 700 650 600 550 500 ) A μ ( D D I ) C º ( R O R R E 0.15 0.1 0.05 0 -0.05 -0.1 -0.15 STATIC QUIESCENT SUPPLY CURRENT vs. TEMPERATURE toc01 3.3V 3.0V 2.7V -10 10 TEMPERATURE (ºC) 30 50 ACCURACY vs. TEMPERATURE (VDD = 2.7V) toc03 +3 SIGMA ERROR MEAN ERROR -3 SIGMA ERROR 0 20 40 TEMPERATURE (ºC) 60 ) A μ ( D D I 2 1.9 1.8 1.7 1.6 1.5 1.4 1.3 1.2 1.1 1 ) C º ( R O R R E 0.15 0.1 0.05 0 -0.05 -0.1 -0.15 STATIC QUIESCENT SUPPLY CURRENT vs. TEMPERATURE (SHUTDOWN MODE) toc02 3.0V 3.3V 2.7V -10 10 30 50 TEMPERATURE (ºC) ACCURACY vs. TEMPERATURE (VDD = 3.0V) toc04 +3 SIGMA ERROR MEAN ERROR -3 SIGMA ERROR 0 20 40 TEMPERATURE (ºC) 60 ) C º ( R O R R E 0.15 0.1 0.05 0 -0.05 -0.1 -0.15 ACCURACY vs. TEMPERATURE (VDD = 3.3V) toc05 +3 SIGMA ERROR MEAN ERROR -3 SIGMA ERROR 0 20 40 TEMPERATURE (ºC) 60 Maxim Integrated │ 5 www.maximintegrated.comMAX30205Human Body Temperature Sensor
    Pin Configuration TOP VIEW VDD 8 A0 7 A1 6 A2 5 MAX30205 EP 4 GND + 1 SDA 3 2 OS SCL TDFN (3mm x 3mm) Pin Description NAME PIN FUNCTION 1 2 3 4 5 6 7 8 — SDA SCL OS GND A2 A1 A0 VDD EP Serial-Data Input/Output Line. Open-drain. Connect SDA to a pullup resistor. High impedance for supply voltages from 0 to 3.3V. Serial-Data Clock Input. Open-drain. Connect SCL to a pullup resistor. High impedance for supply voltages from 0 to 3.3V. Overtemperature Shutdown Output. Open-drain. Connect OS to a pullup resistor. Ground I2C Slave Address Input. Connect A2 to GND or VDD to set the desired I2C bus address. Do not leave unconnected (Table 1). I2C Slave Address Input. Connect A1 to GND, VDD, SDA, or SCL to set the desired I2C bus address. Do not leave unconnected (Table 1). High impedance for supply voltages from 0 to 3.3V. I2C Slave Address Input. Connect A0 to GND, VDD, SDA, or SCL to set the desired I2C bus address. Do not leave unconnected (Table 1). High impedance for supply voltages from 0 to 3.3V. Positive 3.3V Supply Voltage Input. Bypass to GND with a 0.1µF bypass capacitor. Exposed Pad (Bottom-Side of Package). Connect EP to GND. Maxim Integrated │ 6 www.maximintegrated.comMAX30205Human Body Temperature Sensor
    Block Diagram MAX30205 I2C BLOCK DIGITAL LOGIC BLOCK TOS REGISTER TEMP REGISTER THYST REGISTER DIGITAL COMPARATOR THERMOSTAT LOGIC OS ACTIVATE OS N MSB 0 0 0 0 0 DATA POINTER LSB 0 D1 D0 SERIAL LOGIC ADDRESS DECODER VDD SDA SCL A0 A1 VDD GND FAULT QUEUE BITS COMPARE/ INTERRUPT BIT OS POLARITY BIT DATA REGISTER BLOCK D1 D0 0 0 MSB S TEMP MS BYTE 26 25 24 23 22 21 LSB 20 LS BYTE MSB LSB 2-1 2-2 2-3 2-4 2-5 2-6 2-7 2-8 0 1 CONFIG MSB ONE SHOT TIMEOUT DATA FORMAT FAULT QUEUE [1] FAULT QUEUE [2] OS POLARITY COMPARATOR/ INTERRUPT SHUTDOWN LSB MSB S THYST TOS S 1 1 0 1 MS BYTE 26 26 25 25 24 24 23 23 22 22 21 21 LSB 20 LS BYTE MSB LSB 2-1 2-2 2-3 2-4 2-5 2-6 2-7 2-8 20 2-1 2-2 2-3 2-4 2-5 2-6 2-7 2-8 3 2 TEMPERATURE CORE BLOCK VOLTAGE REFERENCE 16-BIT Σ∆ ADC ONE-SHOT BIT SHUTDOWN BIT DIGITAL CONTROL TEMPERATURE SENSOR Maxim Integrated │ 7 www.maximintegrated.comMAX30205Human Body Temperature Sensor
    Detailed Description The MAX30205 temperature sensor measures temperature and converts the data into digital form. An I2C-compatible two-wire serial interface allows access to conversion results. The device accepts standard I2C commands to read the data, set the overtemperature alarm (OS) trip thresholds, and configure other characteristics. While reading the temperature register, any changes in temperature are ignored until the read is completed. The temperature register is updated for the new temperature measurement upon completion of the read operation. OS Output, TOS and THYST Limits In comparator mode, the OS output behaves like a thermostat (Figure 2). The output asserts when the temperature rises above the limit set in the TOS register. The output deasserts when the temperature falls below the limit set in the THYST register. In comparator mode, the OS output can be used to turn on a cooling fan, initiate an emergency shutdown signal, or reduce system clock speed. TEMPERATURE OS OUTPUT (COMPARATOR MODE) OS SET ACTIVE LOW OS OUTPUT (INTERRUPT MODE) OS SET ACTIVE LOW TOS THYST INACTIVE ACTIVE INACTIVE ACTIVE Figure 2. OS Output Temperature Response Diagram READ OPERATION READ OPERATION READ OPERATION Maxim Integrated │ 8 www.maximintegrated.comMAX30205Human Body Temperature Sensor
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