SNIS118E – JULY 1999 – REVISED SEPTEMBER 2013
LM50/LM50-Q1 SOT-23 Single-Supply Centigrade Temperature Sensor
Check for Samples:
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FEATURES
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Calibrated Directly in Degree Celsius
(Centigrade)
Linear + 10.0 mV/°C Scale Factor
±2°C Accuracy Specified at +25°C
Specified for Full
−40°
to +125°C range
Suitable for Remote Applications
Low Cost Due to Wafer-level Trimming
Operates from 4.5V to 10V
Less than 130
μA
Current Drain
Low Self-heating, Less than 0.2°C in Still Air
Nonlinearity Less than 0.8°C Over Temp
LM50Q is AEC-Q100 Grade 1 qualified and is
manufactured on an Automotive Grade flow.
UL Recognized Component
DESCRIPTION
The LM50/LM50-Q1 is a precision integrated-circuit
temperature sensor that can sense a
−40°C
to
+125°C temperature range using a single positive
supply. The LM50/LM50-Q1's output voltage is
linearly proportional to Celsius (Centigrade)
temperature (+10 mV/°C) and has a DC offset of
+500 mV. The offset allows reading negative
temperatures without the need for a negative supply.
The ideal output voltage of the LM50/LM50-Q1
ranges from +100 mV to +1.75V for a
−40°C
to
+125°C temperature range. The LM50/LM50-Q1 does
not require any external calibration or trimming to
provide accuracies of ±3°C at room temperature and
±4°C over the full
−40°C
to +125°C temperature
range. Trimming and calibration of the LM50/LM50-
Q1 at the wafer level assure low cost and high
accuracy. The LM50/LM50-Q1's linear output, +500
mV offset, and factory calibration simplify circuitry
required in a single supply environment where
reading negative temperatures is required. Because
the LM50/LM50-Q1's quiescent current is less than
130
μA,
self-heating is limited to a very low 0.2°C in
still air.
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APPLICATIONS
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Automotive
Computers
Disk Drives
Battery Management
Automotive
FAX Machines
Printers
Portable Medical Instruments
HVAC
Power Supply Modules
Figure 1. SOT-23 Pin Out
Top View
See Package Number DBZ0003A
Figure 2. Full-Range Centigrade Temperature
Sensor Application (−40°C to +125°C)
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PRODUCTION DATA information is current as of publication date. Products conform to specifications per the terms of the Texas Instruments standard
warranty. Production processing does not necessarily include testing of all parameters.
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