MLX90614

Part: MLX90614 — Melexis

Type: Non-Contact Infrared Thermometer Sensor

Description: Factory-calibrated single or dual zone non-contact infrared thermometer in a TO-39 package featuring a 17-bit ADC, DSP signal conditioning, SMBus digital interface, and customizable PWM output.

Operating Conditions:

• Supply voltage: 4.5–5.5 V (Axx version; 3.0 V nominal for Bxx version)
• Operating temperature: -40 to 85 °C (ESF type; -40 to 125 °C for KSF type)
• Object temperature range: -70 to +380 °C

Absolute Maximum Ratings:

• Max supply voltage: 7 V (Axx type, < 24 hours), 5 V (Bxx type, < 24 hours)
• Max continuous current: 100 mA (SDA sink current, < 24 hours)
• Max junction/storage temperature: 125 °C (Storage temperature)

Key Specs:

• Supply Current: 1.3 mA typ., 2.5 mA max. (Axx version, TA = 25 °C, VDD = 5.0 V)
• Measurement resolution: 0.02 °C
• Standard accuracy: ±0.5 °C (Ta and To between 0 °C and +50 °C)
• Medical accuracy: ±0.2 °C (human body temperature range)
• Optical pass band: 5.5 to 14 μm (integrated long-wave pass filter)
• Zener clamp voltage: 5.5 V min., 5.7 V typ., 5.9 V max. (Axx version, IZ = 75 to 1000 μA, Ta = room)
• POR rising threshold: 1.4 V min., 1.75 V typ., 1.95 V max.
• ESD voltage: ±2 kV HBM (AEC-Q100-002, all pins)

Features:

• Integrated IR thermopile detector and signal conditioning ASSP in a single package
• SMBus-compatible 2-wire digital interface
• Configurable 10-bit PWM continuous output mode
• User-programmable thermal relay / alert interrupt function
• Factory-calibrated for emissivity = 1, field-programmable from 0.1 to 1.0
• Sleep mode for reduced power consumption

Applications:

• High precision non-contact temperature measurements
• Body temperature measurement and healthcare
• Thermal comfort sensing for automotive and building air conditioning
• Industrial temperature control of moving parts
• Home appliances with temperature control (e.g., microwave ovens)

Package:

• 4-lead TO-39

• Small size, low cost IR sensor
• Easy to integrate
• Industry standard four lead TO39 package
• Factory calibrated (reports temperature) in wide temperature range:
• -40°C…+125°C for sensor temperature
• -70°C…+380°C for object temperature
• High accuracy of 0.5°C in wide temperature range -0°C…+50°C for both Ta and To
• High (medical) accuracy version
• Measurement resolution of 0.02°C
• SMBus compatible digital interface
• Customizable PWM output for continuous reading
• Single or dual zone version
• Available in 3.0V and 5.0V supply voltage
• Current consumption ≈ 1.4mA
• Simple adaptation for 8V…16V application
• Sleep mode for reduced power consumption
• Operating temperature 40°C… + 125°C
• Target temperature -7 0°C… +380 °C
• Automotive grade

• High precision non-contact temperature measurements
• Microwave ovens
• Thermal Comfort sensor for Mobile Air Conditioning control system
• Intrusion / Movement detection
• 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 appliance with temperature control
• Healthcare
• Livestock monitor
• Movement detector
• Thermal relay / alert
• Body temperature measurement

(TA =25°C, unless otherwise specified)

Table 3 -Absolute Maximum Ratings

Exceeding the absolute maximum ratings may cause permanent damage.

Exposure to absolute maximum-rated conditions for extended periods may affect the device reliability.

Single and dual zone IR sensor in TO39 Datasheet

The MLX90614 can be configured 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

Figure 35 -MLX90614 electrical connections in SMBus communication

Figure 35 shows the connection of a MLX90614 to a SMBus with 3.0V power supply. The MLX90614 has diode clamps SDA / SCL to Vdd so it is necessary MLX90614 to be powered in order not to load the SMBus lines.

The MLX90614 is packaged in an industry standard TO39 can.