LM50B Datasheet, PDF (1/8 Pages) National Semiconductor (TI) – SOT-23 Single-Supply Centigrade Temperature Sensor

June 1996
LM50B LM50C
SOT-23 Single-Supply Centigrade Temperature Sensor
General Description
The LM50 is a precision integrated-circuit temperature sen-
sor that can sense a b40 C to a125 C temperature range
using a single positive supply The LM50’s output voltage is
linearly proportional to Celsius (Centigrade) temperature
(a10 mV C) and has a DC offset of a500 mV The offset
allows reading negative temperatures without the need for a
negative supply The ideal output voltage of the LM50
ranges from a100 mV to a1 75V for a b40 C to a125 C
temperature range The LM50 does not require any external
calibration or trimming to provide accuracies of g3 C at
room temperature and g4 C over the full b40 C to
a125 C temperature range Trimming and calibration of the
LM50 at the wafer level assure low cost and high accuracy
The LM50’s linear output a500 mV offset and factory cali-
bration simplify circuitry required in a single supply environ-
ment where reading negative temperatures is required Be-
cause the LM50’s quiescent current is less than 130 mA
self-heating is limited to a very low 0 2 C in still air
Applications
Y _Computers
Y _{Disk Drives}
Y _{Battery Management}
Y _Automotive
Y _{FAX Machines}
Y _Printers
Y _{Portable Medical Instruments}
Y _HVAC
Y _{Power Supply Modules}
Features
Y _{Calibrated directly in Celsius (Centigrade)}
Y _Linear a _{10 0 mV C scale factor}
Y g_{2 C accuracy guaranteed at} a_{25 C}
Y _{Specified for full} b_{40 to} a_{125 C range}
Y _{Suitable for remote applications}
Y _{Low cost due to wafer-level trimming}
Y _{Operates from 4 5V to 10V}
Y _{Less than 130 mA current drain}
Y _{Low self-heating less than 0 2 C in still air}
Y _{Nonlinearity less than 0 8 C over temp}
Connection Diagram
SOT-23
TL H 12030–1
Top View
See NS Package Number M03B
(JEDEC Registration TO-236AB)
Order
Number
LM50BIM3
LM50CIM3
LM50BIM3X
LM50CIM3X
SOT-23
Device Marking
T5B
T5C
T5B
T5C
Supplied As
250 Units on Tape and Reel
250 Units on Tape and Reel
3000 Units on Tape and Reel
3000 Units on Tape and Reel
Typical Application
TL H 12030 – 3
FIGURE 1 Full-Range Centigrade Temperature Sensor (b40 C to a125 C)
C1996 National Semiconductor Corporation TL H 12030
RRD-B30M76 Printed in U S A
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