Product Descriptions
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.
The sensor IC is packaged together with a NTC chip thermistor for cold junction reference. The thermopile and thermistor are separate components, mounted in close proximity. The NTC thermistors have higher sensitivity at low temperatures than the standard PTC thermistors in the B and D models.
The sensor and thermistor can be used independent of each other if desired, as the thermopile potential is floating.
Product Features
Solid state sensor
High reliability
Low cost, small size
On chip temperature sensor
Product Applications
Non-Contact Temperature Sensing
Differential Temperature Sensing
Climate Control
Ear, Temple Thermometers
Household and Commercial Appliances
Product Photos
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