Melexis MLX90614ESF-BCH-000-TU

The MLX90614 is an Infra Red thermometer for noncontact 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. The thermometer comes factory calibrated with a digital PWM and SMBus (System Management Bus) output. As a standard, the 10-bit PWM is configured to continuously transmit the measured temperature in range of -20...120℃, with an output resolution of 0.14℃. The factory default POR setting is SMBus. The MLX90614 is built from 2 chips developed and manufactured by Melexis: The Infra Red thermopile detector MLX81101 The signal conditioning ASSP MLX90302, specially designed to process the output of IR sensor. The device is available in an industry standard TO-39 package. Thanks to the low noise amplifier, high resolution 17-bit ADC and powerful DSP unit of MLX90302 high accuracy and resolution of the thermometer is achieved. The calculated object and ambient temperatures are available in RAM of MLX90302 with resolution of 0.01℃. They are accessible by 2 wire serial SMBus compatible protocol (0.02℃ resolution) or via 10-bit PWM (Pulse Width Modulated) output of the device. The MLX90614 is factory calibrated in wide temperature ranges: -40℃…125℃ for the ambient temperature and -70℃…+380℃ for the object temperature. The measured value is the average temperature of all objects in the Field Of View of the sensor. The MLX90614 offers a standard accuracy of ±0.5℃ around room temperatures. A special version for medical applications exists offering an accuracy of ±0.2℃ in a limited temperature range around the human body temperature. As a standard, the MLX90614 is calibrated for an object emissivity of 1. It 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. The 10-bit PWM is as a standard configured to transmit continuously the measured object temperature for an object temperature range of -20℃...120℃ with an output resolution of 0.14℃. The PWM can be easily customized for virtually any range desired by the customer by changing the content of 2 EEPROM cells. This has no effect on the factory calibration of the device. The PWM pin can also be configured to act as a thermal relay (input is To), thus allowing for an easy and cost effective implementation in thermostats or temperature (freezing / boiling) alert applications. The temperature threshold is user programmable. In a SMBus system this feature can act as a processor interrupt that can trigger reading all slaves on the bus.

• Small size, low cost
• Easy to integrate
• Factory calibrated in wide temperature range: -40℃…+125℃ for sensor temperature and -70℃…+380℃ for object temperature
• High accuracy of 0.5℃ in a wide temperature range (0℃…+50℃ for both Ta and To)
• High (medical) accuracy calibration
• Measurement resolution of 0.02℃
• Single and dual zone versions
• SMBus compatible digital interface
• Customizable PWM output for continuous reading
• Available in 3V and 5V versions
• Simple adaptation for 8V…16V applications
• Sleep mode for reduced power consumption
• Different package options for applications and measurements versatility
• Automotive grade

• High precision non-contact temperature measurements
• Thermal Comfort sensor for Mobile Air Conditioning control system
• Temperature sensing element for residential, commercial and industrial building air conditioning
• Windshield defogging
• Automotive blind angle detection
• Industrial temperature control of moving parts
• Temperature control in printers and copiers
• Home appliances with temperature control
• Healthcare
• Livestock monitoring
• Movement detection
• Multiple zone temperature control – up to 127 sensors can be read via common 2 wires
• Thermal relay / alert
• Body temperature measurement