[Melexis]

Description
The MLX90247C is a thermopile sensor IC which detects very small amounts of heat radiation. The sensor consists of a membrane with a thermopile on top of it.
The hot junctions of the thermopile are positioned near the center of the membrane, the cold junctions above the bulk silicon edge.
Due to the low thermal conductivity of the membrane, absorbed heat will cause the temperature to increase more at the center of the membrane than at the edge above the bulk. This temperature difference is converted to an electric potential by the thermo-electric effect in the thermopile junctions. No supply voltage is needed.

Features and Benefits
    Solid state sensor
    High reliability
    Low cost, small size
    On chip temperature sensor

Applications
    Non-Contact Temperature Sensing
    Differential Temperature Sensing
    Climate Control
    Ear, Temple Thermometers
    Household and Commercial Appliances