LM61
www.ti.com
SNIS121I – JUNE 1999 – REVISED FEBRUARY 2013
LM61 2.7V, SOT-23 or TO-92 Temperature Sensor
Check for Samples: LM61
FEATURES
DESCRIPTION
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The LM61 is a precision integrated-circuit
temperature sensor that can sense a −30°C to
+100°C temperature range while operating from a
single +2.7V supply. The LM61's output voltage is
linearly proportional to Celsius (Centigrade)
temperature (+10 mV/°C) and has a DC offset of
+600 mV. The offset allows reading negative
temperatures without the need for a negative supply.
The nominal output voltage of the LM61 ranges from
+300 mV to +1600 mV for a −30°C to +100°C
temperature range. The LM61 is calibrated to provide
accuracies of ±2.0°C at room temperature and ±3°C
over the full −25°C to +85°C temperature range.
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Calibrated Linear Scale Factor of +10 mV/°C
Rated for Full −30° to +100°C Range
Suitable for Remote Applications
UL Recognized Component
APPLICATIONS
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Cellular Phones
Computers
Power Supply Modules
Battery Management
FAX Machines
Printers
HVAC
Disk Drives
Appliances
The LM61's linear output, +600 mV offset, and factory
calibration simplify external circuitry required in a
single supply environment where reading negative
temperatures is required. Because the LM61's
quiescent current is less than 125 μA, self-heating is
limited to a very low 0.2°C in still air. Shutdown
capability for the LM61 is intrinsic because its
inherent low power consumption allows it to be
powered directly from the output of many logic gates.
Table 1. Key Specifications
VALUE
UNIT
±2.0 or ±3.0
°C (max)
Accuracy for −30°C to +100°C
±4.0
°C (max)
Accuracy for −25°C to +85°C
±3.0
°C (max)
Temperature Slope
+10
mV/°C
Accuracy at 25°C
Power Supply Voltage Range
+2.7 to +10
V
Current Drain @ 25°C
125
µA (max)
Nonlinearity
±0.8
°C (max)
Output Impedance
800
Ω (max)
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Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
All trademarks are the property of their respective owners.
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.
Copyright © 1999–2013, Texas Instruments Incorporated
LM61
www.ti.com
SNIS121I – JUNE 1999 – REVISED FEBRUARY 2013
Absolute Maximum Ratings (1)
Supply Voltage
+12V to −0.2V
Output Voltage
(+VS + 0.6V) to −0.6V
Output Current
10 mA
Input Current at any pin (2)
5 mA
−65°C to +150°C
Storage Temperature
Maximum Junction Temperature (TJMAX)
+125°C
ESD Susceptibility (3)
Human Body Model
2500V
Machine Model
(1)
(2)
(3)
250V
Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for
which the device is functional, but do not guarantee specific performance limits. For guaranteed specifications and test conditions, see
the Electrical Characteristics . The guaranteed specifications apply only for the test conditions listed. Some performance characteristics
may degrade when the device is not operated under the listed test conditions.
When the input voltage (VI) at any pin exceeds power supplies (VI < GND or VI > +VS), the current at that pin should be limited to 5 mA.
The human body model is a 100 pF capacitor discharged through a 1.5 kΩ resistor into each pin. The machine model is a 200 pF
capacitor discharged directly into each pin.
Operating Ratings (1)
TMIN ≤ TA ≤ TMAX
Specified Temperature Range:
LM61C
−30°C ≤ TA ≤ +100°C
LM61B
−25°C ≤ TA ≤ +85°C
Supply Voltage Range (+VS)
+2.7V to +10V
Thermal Resistance, θJA (2)
SOT-23
TO-92
450°C/W
180°C/W
Soldering process must comply with Reflow Temperature Profile specifications. Refer to http://www.ti.com/packaging. (3)
(1)
(2)
(3)
Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for
which the device is functional, but do not guarantee specific performance limits. For guaranteed specifications and test conditions, see
the Electrical Characteristics . The guaranteed specifications apply only for the test conditions listed. Some performance characteristics
may degrade when the device is not operated under the listed test conditions.
The junction to ambient thermal resistance (θJA) is specified without a heat sink in still air.
Reflow temperature profiles are different for lead-free and non-lead-free packages.
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