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LM60_05 Datasheet

  • LM60_05

  • National Semiconductor [2.7V, SOT-23 or TO-92 Temperature S...

  • NSC

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LM60 2.7V, SOT-23 or TO-92 Temperature Sensor
August 2005
LM60
2.7V, SOT-23 or TO-92 Temperature Sensor
General Description
The LM60 is a precision integrated-circuit temperature sen-
sor that can sense a 鈭?0藲C to +125藲C temperature range
while operating from a single +2.7V supply. The LM60鈥檚
output voltage is linearly proportional to Celsius (Centigrade)
temperature (+6.25 mV/藲C) and has a DC offset of +424 mV.
The offset allows reading negative temperatures without the
need for a negative supply. The nominal output voltage of the
LM60 ranges from +174 mV to +1205 mV for a 鈭?0藲C to
+125藲C temperature range. The LM60 is calibrated to pro-
vide accuracies of
鹵
2.0藲C at room temperature and
鹵
3藲C
over the full 鈭?5藲C to +125藲C temperature range.
The LM60鈥檚 linear output, +424 mV offset, and factory cali-
bration simplify external circuitry required in a single supply
environment where reading negative temperatures is re-
quired. Because the LM60鈥檚 quiescent current is less than
110 碌A, self-heating is limited to a very low 0.1藲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.
n
Available in SOT-23 and TO-92 packages
Applications
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Cellular Phones
Computers
Power Supply Modules
Battery Management
FAX Machines
Printers
HVAC
Disk Drives
Appliances
Key Specifications
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Features
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Calibrated linear scale factor of +6.25 mV/藲C
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Rated for full 鈭?0藲 to +125藲C range
n
Suitable for remote applications
鹵
2.0 and
鹵
3.0藲C (max)
Accuracy at 25藲C:
鹵
4.0藲C (max)
Accuracy for 鈭?0藲C to +125藲C:
鹵
3.0藲C (max)
Accuracy for 鈭?5藲C to +125藲C:
Temperature Slope: +6.25mV/藲C
Power Supply Voltage Range: +2.7V to +10V
Current Drain
@
25藲C: 110碌A (max)
Nonlinearity:
鹵
0.8藲C (max)
Output Impedance: 800鈩?(max)
Typical Application
Connection Diagrams
SOT-23
01268101
01268102
V
O
= (+6.25 mV/藲C x T 藲C) + 424 mV
Top View
See NS Package Number mf03a
TO-92
Temperature (T)
+125藲C
+100藲C
+25藲C
0藲C
鈭?5藲C
鈭?0藲C
Typical V
O
+1205 mV
+1049 mV
+580 mV
+424 mV
+268 mV
+174 mV
01268123
See NS Package Number Z03A
FIGURE 1. Full-Range Centigrade Temperature Sensor
(鈭?0藲C to +125藲C) Operating from a Single Li-Ion
Battery Cell
漏 2005 National Semiconductor Corporation
DS012681
www.national.com

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