MLX90615SSG-DAA Melexis Inc, MLX90615SSG-DAA Datasheet
MLX90615SSG-DAA
Specifications of MLX90615SSG-DAA
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MLX90615SSG-DAA Summary of contents
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... Measurement resolution of 0.02° C SMBus compatible digital interface Power saving mode Customizable PWM output for continuous reading Embedded emissivity compensation 3V supply voltage Ordering Information Part No. MLX90615 (1) Accuracy B standard D medical accuracy Example: MLX90615SSG-BAA 1 Functional diagram J1 MLX90615 4 U1 Vss SCL SDA SDA 1 Vdd Vdd 2 GND 0 ...
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... Melexis is able to deliver a high accuracy and high resolution infrared thermometer. The calculated object and ambient temperatures are available in the RAM memory of the MLX90325 with a resolution of 0.02 ˚C. The values are accessible by 2 wire serial SMBus compatible protocol with a resolution of 0.02° via a 10- bit PWM (Pulse Width Modulated) signal from the device. The MLX90615 is factory calibrated in standard temperature ranges from: -40...85˚ ...
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... Sleep Mode..................................................................................................................................................................................... 14 8.5 Switching between PWM and SMBus ................................................................................................................................................... 15 8.5.1 PWM is enabled ............................................................................................................................................................................. 15 8.5.2 Request condition........................................................................................................................................................................... 15 8.5.3 PWM is disabled............................................................................................................................................................................. 16 8.6 PWM ....................................................................................................................................................................................................... 16 8.6.1 PWM format.................................................................................................................................................................................... 16 8.6.2 Customizing the temperature range for PWM output.................................................................................................................... 16 8.7 Principle of operation ............................................................................................................................................................................. 18 8.7.1 Ambient temperature Ta ................................................................................................................................................................ 18 8.7.2 Object temperature T .................................................................................................................................................................... Unique Features ............................................................................................................................................................................................ 19 10 Performance Graphs ...
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... POR HFO DSP FIR IIR IR DC LPF FOV SDA,SCL Serial DAta, Serial CLock – SMBus compatible communication pins Ta Ambient Temperature measured from the chip – (the package temperature) To ESD EMC TBD 5 Maximum ratings Parameter. Supply Voltage, V (over voltage) DD Supply Voltage, V (operating) ...
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Pin definitions and descriptions Pin Name Digital input / output open drain NMOS. In SMBus mode (factory default) Serial Data I/ SDA / PWM mode – output. W eak pull- ...
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Electrical Specifications All parameters are preliminary for T Parameter Symbol External supply Supply current Supply current I (programming) Power-down supply current Isleep POR level V V rise time T DD Output valid Tvalid Data retention Erase/write cycles Erase/write cycles ...
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... MLX90615 is always a slave device on the bus. MLX90615 can work in both low-power and high-power SMBus communication. All voltages are with respect to the Vss (ground) unless otherwise noted. 3901090615 Rev 002 Test Conditions SMBus compatible 2-wire interface (Ta,V) Over temperature and supply (Ta,V) Over temperature and supply Over temperature and supply Isink = 2mA Ta=+85° C leak ...
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... RAM remain constant). The IIR filter can also limit effect of spurious objects that may appear in the FOV in some applications. The PWM output can be enabled in EEPROM as the POR default. Linearized temperatures (To or Ta, selectable in EEPROM) are available through the free-running PWM output. ...
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... Note that all MLX90615 will respond to SA=0x00 and therefore this value is useless in a network. Factory default is 5Bh. PWM T min: 15 bit limit for the PWM signal minimum temperature – right justified (factory default is 355Bh, which corresponds to +0.03° C) PWM T range: 15 bit range for the PWM signal temperature (T 09C3h, which corresponds to a PWM range +0.03… ...
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IIR setting 000b must be avoided Emissivity: Contains the value for object emissivity correction. The MLX90615 will compensate for the emissivity of the object measured with respect to that value. The equation for that register is Emissivity = dec2hex[round(16384 ...
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... T is the MLX90615 package (ambient) temperature and T A 0.02° K/LSB. To convert a read object temperature into degrees Celsius the equation ° RAM Raw IR data is in sign (1 bit, the MSB) and magnitude (15 bits) format. 8.4 SMBus compatible 2-wire protocol The chip supports a 2 wires serial protocol, build with pins SDA and SCL. ...
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Detailed description The SDA pin of the MLX90615 can operate also as a PWM output, depending on the EEPROM settings. If PWM is enabled, after POR the SDA pin is directly configured as a PWM output. The PWM mode ...
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Write Word (EEPROM only) Figure 6: SMBus write word format (Write 0x3999 to EEPROM 0x03) Note: Before a write operation to takes place, the EEPROM cell needs to be erased. An erase operation is simply a writing of 0x0000 ...
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... In application mode RAM and EEPROM can be read both with 16x16 sizes. (For example, address 0x07h will sweep between 0x2D8Ah to 0x4BD0h as the object temperature rises from -40° +115° C). The MSB read from RAM is an error flag (active high) for the linearized temperatures (T Opcode ...
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SCL needs to be high during Sleep. SDA can idle in each state at the same time, but the high state is recommended as the pull-up does not add current drain. There are weak pull-ups on both SCL and SDA ...
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... PWM operates with a 10-bit number so the transmitted temperature is rescaled in order to fit in the desired range. For this goal 2 cells in EEPROM are foreseen to store the desired temperature range, PWM T min and PWM T range. Thus the output range can be programmed with an accuracy of 0.02 °C. ...
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... 3904 = = = T 1004 The temperature is calculated as follows − 3904 . 0 125 O Where 0.125 is START period (always high) which carry no temperature information and must be subtracted. 3901090615 Rev 002 T RANGE = EEPROM 1023 To − MIN [° MAX = MIN + RANGE Figure 14: PWM example => PWM T [EEPROM (to min => ...
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... Ta is the sensor die absolute (Kelvin) temperature, and the overall sensitivity. An additional sensor is needed for the chip temperature. After measurement of the output of both sensors, the corresponding ambient and object temperatures can be calculated. These calculations are done by the internal DSP, which produces digital outputs, linearly proportional to measured temperatures. ...
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... Figure 14: Preliminary accuracy of MLX90615 (T All accuracy specifications apply under settled isothermal conditions only and nominal supply voltage. The accuracy for the MLX90615SSG-DAX in the range T in diagram below. The accuracy for the rest ranges is same as in previous diagram. 3901090615 Rev 002 To, ° ...
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... Figure 15: Preliminary accuracy of MLX90615SSG-DAx (T 10.2 Field Of View (FOV) Field of view is determined at 50% thermopile signal and with respect to the sensor main axis. Parameter Peak direction FOV width 1.0 0.8 0.5 0.3 0.0 -80° -70° -60° -50° -40° -30° -20° -10° 0° ...
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... Figure 17 Typical FOV of MLX90615SSG-XAG 11 Applications Information 11.1 Use of the MLX90615 thermometer in SMBus configuration Figure 18: Connection of MLX90615 to SMBus. MLX90615 has diode clamps SDA/SCL to Vdd necessary to provide MLX90615 with power in order not to load the SMBus lines ...
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... In EEPROM two PWM periods can be programmed – 102 (typ). With remote installation (wires) PWM is recommended as more robust to EMI than the SMBus and the high PWM period would be also preferred factory default, once PWM is enabled, output will cover 0…50°C object temperature range (as 12.5 … 62.5% duty cycle kHz frequency. ...
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Application Comments Significant contamination at the optical input side (sensor filter) might cause unknown additional filtering/distortion of the optical signal and therefore result in unspecified errors. IR sensors are inherently susceptible to errors caused by thermal gradients . There ...
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... Do not expose the sensor to aggressive detergents such as Freon, Trichloroethylene, etc. - Windows may be cleaned with alcohol and cotton swab at ambient temperatures. - Rework by manual soldering can be done with soldering iron temperature maximum 350°C for maximum 5 sec. - Avoid heat exposure to the top and the window of the package. ...
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... When considering reflow soldering, measure the temperature profile of the top of the can and keep the peak temperature as low as possible. - Please contact Melexis in case you intend to use a reflow soldering process for through hole devices to verify your soldering process design. Melexis is contributing to global environmental conservation by promoting lead free solutions. For more ...
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... Emissivity (explained first in this section) is another issue with clothes that has to be considered. There is also the simple chance that the measured temperature is adequate – for example cold winter human hand can appear at temperatures not too close to the well known +37°C. ...
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... Package Information Figure 22: MLX90615SSG-DAA package drawing Figure 23: MLX90615SSG-DAG package drawing 3901090615 Rev 002 Infra Red Thermometer Page Data Sheet 12 Oct 2010 ...
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... Melexis reserves the right to change specifications and prices at any time and without notice. Therefore, prior to designing this product into a system necessary to check with Melexis for current information. This product is intended for use in normal commercial applications. Applications requiring extended temperature range, unusual environmental requirements, or high reliability applications, such as military, medical life- support or life-sustaining equipment are specifically not recommended without additional processing by Melexis for each application ...