Rainbow Electronics LM60 User Manual
LM60
2.7V, SOT-23 or TO-92 Temperature Sensor
General Description
The LM60 is a precision integrated-circuit temperature sensor that can sense a −40˚C to +125˚C temperature range
while operating from a single +2.7V supply. The LM60’s
output voltage is linearly proportional to Celsius (Centigrade)
temperature (+6.25 mV/˚C) and has a DC offset of +424 mV.
The offset allows reading negative temperatures without the
need for anegativesupply. The nominal output voltageofthe
LM60 ranges from +174 mV to +1205 mV for a −40˚C to
+125˚C temperature range. The LM60 is calibrated to provide accuracies of
over the full −25˚C to +125˚C temperature range.
The LM60’s linear output, +424 mV offset, and factory calibration simplify external circuitry required in a single supply
environment where reading negative temperatures is required. Because the LM60’s quiescent current is less than
110µA, self-heating is limited to a very low 0.1˚C in still air in
the SOT-23 package. Shutdown capability for the LM60 is
intrinsic because its inherent low power consumption allows
it to be powered directly from the output of many logic gates.
±
2.0˚C at room temperature and±3˚C
Features
n Calibrated linear scale factor of +6.25 mV/˚C
n Rated for full −40˚ to +125˚C range
n Suitable for remote applications
n Available in SOT-23 and TO-92 packages
Applications
n Cellular Phones
n Computers
n Power Supply Modules
n Battery Management
n FAX Machines
n Printers
n HVAC
n Disk Drives
n Appliances
Key Specifications
n Accuracy at 25˚C:
n Accuracy for −40˚C to +125˚C:
n Accuracy for −25˚C to +125˚C:
n Temperature Slope: +6.25mV/˚C
n Power Supply Voltage Range: +2.7V to +10V
n Current Drain
n Nonlinearity:
n Output Impedance: 800Ω (max)
±
2.0 and±3.0˚C (max)
@
25˚C: 110µA (max)
±
0.8˚C (max)
±
4.0˚C (max)
±
3.0˚C (max)
LM60 2.7V, SOT-23 or TO-92 Temperature Sensor
July 2001
Typical Application
VO= (+6.25 mV/˚C x T ˚C) + 424 mV
Temperature (T) Typical V
+125˚C +1205 mV
+100˚C +1049 mV
+25˚C +580 mV
0˚C +424 mV
−25˚C +268 mV
−40˚C +174 mV
FIGURE 1. Full-Range Centigrade Temperature Sensor
(−40˚C to +125˚C) Operating from a Single Li-Ion
Battery Cell
01268102
O
Connection Diagrams
SOT-23
01268101
Top View
See NS Package Number MA03B
TO-92
01268123
See NS Package Number Z03A
© 2001 National Semiconductor Corporation DS012681 www.national.com
Ordering Information
LM60
Order
Number
Device
Marking
Supplied In
LM60BIM3 T6B 1000 Units on Tape and Reel
LM60BIM3X T6B 3000 Units on Tape and Reel
LM60CIM3 T6C 1000 Units on Tape and Reel
LM60CIM3X T6C 3000 Units on Tape and Reel
LM60BIZ LM60BIZ Bulk
LM60CIZ LM60CIZ Bulk
Accuracy Over
Specified
Temperature
Range
±
3
±
4
±
3
±
4
Specified
Temperature
Range
−25˚C ≤ T
A
+125˚C
−40˚C ≤ T
A
+125˚C
−25˚C ≤ T
A
+125˚C
−40˚C ≤ T
A
+125˚C
≤
≤
≤
≤
Package Type
SOT-23
TO-92
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LM60
Absolute Maximum Ratings (Note 1)
Supply Voltage +12V to −0.2V
Output Voltage (+V
+ 0.6V) to
S
−0.6V
Storage Temperature −65˚C to
+150˚C
Maximum Junction Temperature
) +125˚C
(T
JMAX
Output Current 10 mA
Input Current at any pin (Note 2) 5 mA
ESD Susceptibility (Note 3) :
Human Body Model 2500V
Machine Model
SOT-23
TO-92
250V
200V
Recommended Lead Temperature
(Note 4):
SOT Package:
Vapor Phase (60 sec)
Infrared (15 sec)
TO-92 Package (3 sec, dwell time)
+215˚C
+220˚C
+240˚C
Operating Ratings(Note 1)
Specified Temperature Range: T
LM60B −25˚C ≤ TA≤ +125˚C
LM60C −40˚C ≤ T
Supply Voltage Range (+V
Thermal Resistance, θ
) +2.7V to +10V
S
(Note
JA
5)
SOT-23
TO-92
MIN
≤ TA≤ T
≤ +125˚C
A
450˚C/W
180˚C/W
MAX
Electrical Characteristics
Unless otherwise noted, these specifications apply for +VS= +3.0 VDCand I
=T
MIN
to T
; all other limits TA=TJ= 25˚C.
MAX
Parameter Conditions Typical
(Note 6)
Accuracy (Note 8)
Output Voltage at 0˚C +424 mV
Nonlinearity (Note 9)
Sensor Gain +6.25 +6.06 +6.00 mV/˚C (min)
(Average Slope) +6.44 +6.50 mV/˚C (max)
Output Impedance 800 800 Ω (max)
Line Regulation (Note 10) +3.0V ≤ +V
+2.7V ≤ +V
Quiescent Current +2.7V ≤ +V
Change of Quiescent Current +2.7V ≤ +V
≤ +10V
S
≤ +3.3V
S
≤ +10V 82 110 110 µA (max)
S
≤ +10V
S
±
5.0 µA (max)
Temperature Coefficient of 0.2 µA/˚C
Quiescent Current
Long Term Stability (Note 11) T
J=TMAX
=+125˚C, for
±
0.2 ˚C
1000 hours
Note 1: 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.
Note 2: When the input voltage (V
Note 3: 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.
Note 4: See the URL ”http://www.national.com/packaging/“ for other recomdations and methods of soldering surface mount devices.
Note 5: The junction to ambient thermal resistance (θ
Note 6: Typicals are at T
Note 7: Limits are guaranteed to National’s AOQL (Average Outgoing Quality Level).
Note 8: Accuracy is defined as the error between theoutput voltage and +6.25 mV/˚C times the device’s case temperature plus 424 mV, at specified conditions of
voltage, current, and temperature (expressed in ˚C).
Note 9: Nonlinearity is defined as the deviation of the output-voltage-versus-temperature curve from the best-fit straight line, over the device’s rated temperature
range.
) at any pin exceeds power supplies (V
I
) is specified without a heat sink in still air.
= 25˚C and represent most likely parametric norm.
J=TA
JA
<
GND or V
I
>
+VS), the current at that pin should be limited to 5 mA.
I
= 1 µA. Boldface limits apply for TA=T
LOAD
LM60B LM60C Units
Limits Limits
(Note 7) (Note 7)
±
2.0
±
3.0
±
0.6
±
0.3
±
2.3
±
3.0 ˚C (max)
±
4.0 ˚C (max)
±
0.8 ˚C (max)
±
0.3 mV/V (max)
±
2.3 mV (max)
125 125 µA (max)
(Limit)
J
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