MLX90247 family
Discrete Infrared Thermopile Detectors
3. Glossary of Terms
IR: Infrared. Every object emits infrared radiation in relation to its temperature. This effect can be used to
measure the temperature without the need for physical contact.
PTC: On-chip thermistor which resistance increases with rising temperature (Positive Thermal Coefficient)
t bb : Black body (object temperature)
t a : Ambient (die) temperature
4. Pin Definitions and Descriptions
TO-39 package - connections
1
2
4
P in
1
2
3
4
Sy m b o l
O u tIr+
R s e ns
O u tIr-
Vs s
D e s c r ip t io n
I nf r a r e d T h e r m o p i l e p o s i t i v e o u t p u t
T h e r m i s t o r - a m b i e nt ( d i e ) t e m p e r a t u r e s e ns o r
I nf r a r e d T h e r m o p i l e ne g a t i v e o u t p u t
T h e r m i s t o r g r o u nd / c a s e p o t e nt i a l
3
Top view = pins down
3901090247
Rev. 004
Page 3 of 9
Data Sheet
Oct/07
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