mlx90614 Melexis Company, mlx90614 Datasheet
mlx90614
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mlx90614 Summary of contents
Page 1
... Number of thermopiles: A – single zone B – dual zone 2 General Description The MLX90614 is an Infra Red thermometer for non contact temperature measurements. Both the IR sensitive thermopile detector chip and the signal conditioning ASSP are integrated in the same TO-39 can. Thanks to its low noise amplifier, 17-bit ADC and powerful DSP unit, a high accuracy and resolution of the thermometer is achieved ...
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... As a standard, the MLX90614 is calibrated for an object emissivity can be easily customized by the customer for any other emissivity in the range 0.1-1.0 without the need of recalibration with a black body. ...
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... Thermal relay.....................................................................................................................................................................................24 9 Unique Features........................................................................................................................................................................................25 10 Performance Graphs...............................................................................................................................................................................26 10.1 Temperature accuracy of the MLX90614 ........................................................................................................................................26 10.2 Field Of View (FOV) ........................................................................................................................................................................28 11 Applications Information..........................................................................................................................................................................30 11.1 Use of the MLX90614 thermometer in SMBus configuration ..........................................................................................................30 11.2 Use of multiple MLX90614s in SMBus configuration.......................................................................................................................30 11.3 PWM output operation.....................................................................................................................................................................31 11.4 Thermal alert / thermostat ...............................................................................................................................................................31 11.5 High voltage source operation.........................................................................................................................................................32 12 Application Comments ............................................................................................................................................................................33 13 Standard information regarding manufacturability of Melexis products with different soldering processes ...
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... Ambient Temperature measured from the chip – (the package temperature) To Object Temperature, ‘seen’ from IR sensor ESD Electro-Static Discharge EMC Electro-Magnetic Compatibility TBD To Be Defined Note: sometimes the MLX90614xxx is referred to as “the module”. 5 Maximum ratings Parameter Supply Voltage, V (over voltage) DD Supply Voltage, V (operating) DD ...
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... Ground. The metal can is also connected to this pin. Serial clock input for 2 wire communications protocol. 5.7V zener is available at this pin for connection of external bipolar transistor to MLX90614A to supply the device from external 8 -16V source. Digital input / output. In normal mode the measured object temperature is available at this pin Pulse Width Modulated. ...
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... source sink Vout 0.8V PWM DD Vout,L = 0.8V PWM 100 pF capacitive load, full Tset operating Ta range 220 Ohm in series with 47nF load on the wire, full Ta operating RC range Page MLX90614 family Single and Dual Zone Min Typ Max 4 1.5 2.5 5.6 5.75 5.8 5.15 5.75 6.24 2.7 3.0 3.3 3 0.15 ...
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... All the communication and refresh rate timings are given for the nominal calibrated HFO frequency and will vary with this frequency’s variations. 1. All PWM timing specifications are given for single PWM output (factory default for MLX90614xAx). For the extended PWM output (factory default for the MLX90614xBx) each period has twice the timing specifications (refer to the PWM detailed description section) ...
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... MLX90614Bxx , MLX90614Dxx All parameters are preliminary for T Parameter Symbol External supply V DD Supply current I DD Supply current I DDpr (programming) Power-down supply Isleep current Power-down supply Isleep current POR level V POR V rise time T DD POR Output valid Tvalid PWM resolution PWMres PWM output period ...
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... Data retention Erase/write cycles Erase/write cycles Erase cell time Terase Write cell time Twrite Note: refer to MLX90614Axx notes. 3901090614 Rev 003 MLX90614 family Infra Red Thermometer in TO-39 Test Conditions SMBus compatible 2-wire interface Over temperature and supply Over temperature and supply SDA pin in open drain mode, ...
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... PWM output or the SMBus compatible interface. The ASSP supports 2 IR sensors (second one not implemented in the MLX90614xAx).The output of the IR sensors is amplified by a low noise low offset chopper amplifier with programmable gain, converted by a Sigma Delta modulator to a single bit stream and fed to a powerful DSP for further processing ...
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... MLX90614xxx in reset until the Vdd is higher than the specified POR threshold V different for MLX90614Axx and MLX90614Bxx). During the time POR is active, the POR signal is available as an open drain (active high) at the PWM/SDA pin. After the MLX90614xxx exits the POR condition, the function programmed in EEPROM takes precedence for that pin. ...
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... Page MLX90614 family Single and Dual Zone 0 – Extended PWM, factory default for MLX90614xBx 0 - Disable PWM (Enable SMBus), Factory default 0 – OpenDrain NMOS, factory default 0 - PWM, Factory default Bit 0.5 0.5 1 0.571428571 0.428571428 0 0 ...
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... The MD has read access to the RAM and EEPROM and write access to 9 EEPROM cells (at addresses 0x20h, 0x21h, 0x22h, 0x23h, 0x24h, 0x25h*, 0x2Eh, 0x2Fh, 0x39h). If the access to the MLX90614 is a read operation it will respond with 16 data bits and 8 bit PEC only if its own slave address, programmed in internal EEPROM, is equal to the SA, sent by the master ...
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... Write Word 8.4.3 Detailed description The PWM/SDA pin of MLX90614 can operate also as PWM output, depending on the EEPROM settings. If PWM is enabled, after POR the PWM/SDA pin is directly configured as PWM output. The PWM mode can be avoided and the pin can be restored to its Data function by a special command. That is why hereafter both modes are treated separately ...
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... REQ mode to SMBus mode; Timeout L is the maximum allowed time for SCL to be low. After this time the MLX90614 will reset its communication block and will be ready for new communication; Timeout H is the maximum time for which it is allowed for SCL to be high during communication. After this time MLX90614 will reset its communication block assuming that the bus is idle (according to the SMBus specification) ...
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... Note*: The xxxxx represent the 5 LSBits of the memory map address to be read/written. Note**: Behaves like read command. The MLX90614 returns PEC after 16 bits data of which only 4 are meaningful and if the MD wants it, it can stop the communication after the first byte. The difference between read and read flags is that the latter does not have a repeated start bit ...
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... This mode is not available for the 5V supply version. To limit the current consumption to 2.5uA (typical), the SCL pin should be kept low during sleep. MLX90614 goes back into power-up default mode (via POR reset) by setting SCL pin high and then PWM/SDA pin low for at least t configured for PWM (EN_PWM is high), the PWM interface will be selected after awakening and if PWM control [2], PPODB is 1 the MLX90614 will output a PWM pulse train with push-pull output ...
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... PWM The MLX90614 can be read via PWM or SMBus compatible interface. Selection of PWM output is done in EEPROM configuration (factory default is SMBus). PWM output has two programmable formats, single and dual data transmission, providing single wire reading of two temperatures (dual zone object or object and ambient) ...
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... Table high1 =1.125*T. As shown in Figure 11, in extended PWM format the 4 +38.2)/64 = 34h, min +38.2)/64 = E0h, max + 273.15) = 6AB3h min + 273.15) = 7E3Bh max Page MLX90614 family Single and Dual Zone = 0. New Data 1 ⎤ Tmin ⎥ 1 ⎦ ⎤ Tmin ⎥ ...
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... MAX MIN EEPROM EEPROM PWM ambient 1023 100 LSB 64 100 LSB 64 Page MLX90614 family Single and Dual Zone and To ) and one for min max ). min [°C] and 1LSB MAX − MAX 1023 Data Sheet 03/Oct/2007 MIN [°C] ...
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... Switching Between PWM and SMBus communication 8.6.1 PWM is enabled The diagram below illustrates the way of switching to SMBus if PWM is enabled (factory programmed POR default for MLX90614 is SMBus, PWM disabled). Note that the SCL pin needs to be kept high in order to use PWM. SCL PWM/SDA ...
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... Processing of the object temperature consists of three parts. The first one is common for both IR sensors, the third part can be skipped if only one IR sensor is used. IR offset: Offset measurement with a fixed length FIR Additional filtering with a fixed length IIR. The result is stored into RAM as IR 3901090614 Rev 003 MLX90614 family Infra Red Thermometer in TO- − ...
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... IR1 = IIR(L Gcomp filtering T OBJ1 IR = IIR(L , Gcomp K calculation G 2 Figure 15: Software flow Page MLX90614 family Single and Dual Zone . IR2 meas = meas(N ) IR2 = meas Offset comp = IR1 - IR IR2 = IR2 D OS Dcomp Gain comp *K IR2 ...
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... The MLX90614 can be configured to behave as a thermo relay with programmable threshold and hysteresis on the PWM/SDA pin. The input for the comparator unit of the relay is the object temperature from sensor 1 The output of the MLX90614 is NOT a relay driver but a logical output which should be connected to a relay driver if necessary. ...
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... Unique Features The MLX90614 is a ready-to use low-cost non contact thermometer provided from Melexis with output data linearly dependent on the object temperature with high accuracy and extended resolution. It supports versatile customization to a very wide range of temperatures, power supplies and refresh rates. ...
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... C ± ± ± 1 -40 o ± ± 3 -70 -40 -20 Figure 17: Preliminary accuracy of MLX90614 (Ta,To) All accuracy specifications apply under settled isothermal conditions only. 3901090614 Rev 003 Infra Red Thermometer in TO-39 o ± ± ± ...
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... A version of the MLX90614 with accuracy suited for medical applications is available. The accuracy in the range Ta 10ºC - 40ºC and To 32ºC - 42ºC is shown in diagram below. The accuracy for the rest of the temperature ranges is the same as in previous diagram. Medical accuracy specification is only available for the MLX90614DAA version ...
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... Figure 19: FOV of MLX90614xAA 1.00 0.75 0.50 0.25 0.00 -80° -60° -40° -20° Figure 20: FOV of MLX90614xBA 3901090614 Rev 003 MLX90614 family Infra Red Thermometer in TO-39 MLX90614xAA MLX90614xBA ±0° -25° 90° 70° -25° Not applicable 70° Angle, Deg 0° 20° 40° 60° Angle, Deg 0° ...
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... Figure 21: FOV of MLX90614xAC 3901090614 Rev 003 MLX90614 family Infra Red Thermometer in TO-39 Angle, Deg 0° 20° 40° 60° Page Single and Dual Zone 80° Data Sheet 03/Oct/2007 ...
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... Figure 23: Use of multiple MLX90614 devices in SMBus network The MLX90614 supports a 7-bit slave address in EEPROM, thus allowing up to 127 devices to be read via two common wires. With the MLX90614BBx this results in 254 object temperatures measured remotely and an additional 127 ambient temperatures which are also available. Current source pull-ups may be preferred with higher capacitive loading on the bus (C3 and C4 represent the lines’ ...
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... Figure 26: Thermal alert/thermostat applications of MLX90614 The MLX90614 can be configured in EEPROM to operate as a thermal relay. A non contact freezing or boiling prevention with 1 mA quiescent current can be built with two components only – the MLX90614 and a 3901090614 Rev 003 Infra Red Thermometer in TO-39 J1 ...
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... High voltage source operation As a standard, the module MLX90614Axx works with a supply voltage of 5Volt. In addition, thanks to the integrated internal reference regulator available at pin SCL/Vz, this module can easily be powered from higher voltage source (like VDD=8…16V). Only a few external components as depicted in the diagram below are required to achieve this ...
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... For ESD protection there are clamp diodes between the Vss and Vdd and each of the other pins. This means that the MLX90614 might draw current from a bus in case the SCL and/or SDA is connected and the Vdd is lower than the bus pull-ups’ voltage. ...
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... In many applications a 100nF SMD ceramic capacitor close to the Vdd and Vss pins would be a good choice. It should be noted that not only the trace to the Vdd pin needs to be short, but also the one to the Vss pin. Using MLX90614 with short pins improves the effect of the power supply decoupling. ...
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... RoHS compliant products (RoHS = European directive on the Restriction Of the use of certain Hazardous http://www.melexis.com/quality.aspx The MLX90614 is RoHS compliant 14 ESD Precautions Electronic semiconductor products are sensitive to Electro Static Discharge (ESD). Always observe Electro Static Discharge control procedures whenever handling semiconductor products. 3901090614 Rev 003 MLX90614 family ...
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... IR material reflectivity equals 1.00 minus emissivity) the bigger errors it produces. After I put the MLX90614 in the dashboard I start getting errors larger than specified in spite that the module was working properly before that. Why? Any object present in the FOV of the module provides IR signal ...
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... Even more, the glass (in most cases) is not transparent to the IR radiation used by the MLX90614. Glass has temperature and really high emissivity in most cases – “black” for IR of interest. Overall, Sun behind a window is most likely to introduce relatively small errors. Why is it not completely eliminated after all? Even visible light partially absorbed in the filter of the sensor has some heating potential and there is no way that the sensor die will be “ ...
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... Package Information 16.1 MLX90614XXA The MLX90614 is packaged in an industry standard TO – 39 can. Note: 1. All dimensions are in mils [mm] 2. ØA = 3.5 mm 3901090614 Rev 003 MLX90614 family Infra Red Thermometer in TO-39 Figure 28: MLX90614XXA package Page Single and Dual Zone Data Sheet 03/Oct/2007 ...
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... MLX90614XXC 3901090614 Rev 003 MLX90614 family Infra Red Thermometer in TO-39 Figure 29: MLX90614XXC package Page Single and Dual Zone Data Sheet 03/Oct/2007 ...
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... Or for additional information contact Melexis Direct: E-mail: 3901090614 Rev 003 Infra Red Thermometer in TO-39 www.melexis.com Europe, Africa, Asia: Phone: +32 1367 0495 Phone: +1 603 223 2362 sales_europe@melexis.com E-mail: Page MLX90614 family Single and Dual Zone America: sales_usa@melexis.com ISO/TS 16949 and ISO14001 Certified Data Sheet 03/Oct/2007 ...