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LM20BIM7-LM20BIM7X-LM20CIM7-LM20CIM7X-LM20SIBP-LM20SIBPX
2.4V, 10µA, SC70, micro SMD Temperature Sensor
LM20
2.4V, 10µA, SC70, micro SMD Temperature Sensor
General DescriptionThe LM20isa precision analog output CMOS integrated-
circuit temperature sensor that operates overa −55˚Cto
+130˚C temperature range. The power supply operating
rangeis +2.4Vto +5.5V. The transfer functionof LM20is
predominately linear, yet hasa slight predictable parabolic
curvature. The accuracyof the LM20 when specifiedtoa
parabolic transfer functionis ±1.5˚Catan ambient tempera-
tureof +30˚C. The temperature error increases linearly and
reachesa maximumof ±2.5˚Cat the temperature range
extremes. The temperature rangeis affectedby the power
supply voltage.Ata power supply voltageof2.7Vto5.5V
the temperature range extremes are +130˚C and −55˚C.
Decreasing the power supply voltageto 2.4V changes the
negative extremeto −30˚C, while the positive remainsat
+130˚C.
The LM20’s quiescent currentis less than10 µA. Therefore,
self-heatingis less than 0.02˚Cin stillair. Shutdown capa-
bilityforthe LM20is intrinsic becauseits inherent low power
consumption allowsittobe powered directly fromthe output many logic gatesor doesnot necessitate shutdownatall.
Applications Cellular Phones Computers Power Supply Modules Battery Management FAX Machines Printers HVAC Disk Drives Appliances
Features Ratedforfull −55˚Cto +130˚C range Availableinan SC70 anda micro SMD package Predictable curvature error Suitablefor remote applications
Key Specifications Accuracyat +30˚C ±1.5to±4˚C (max) Accuracyat +130˚C& −55˚C ±2.5to±5˚C (max) Power Supply Voltage Range +2.4Vto +5.5V Current Drain 10µA (max) Nonlinearity ±0.4% (typ) Output Impedance 160Ω (max) Load Regulation
0µA
Typical Application
Full-Range Celsius (Centigrade) Temperature Sensor (−55˚Cto +130˚C)
Operating froma Single Li-Ion Battery Cell
Output Voltagevs Temperature
10090802= (−3.88x10−6xT2)+ (−1.15x10−2xT)+ 1.8639
where:is temperature,andVOisthe measured output voltageofthe LM20.
March 2004
LM20
2.4V
10µA,
SC70,
micro
SMD
emperature
Sensor
