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National Semiconductor - SOT-23 Temperature Sensor

Numéro de référence SM73710
Description SOT-23 Temperature Sensor
Fabricant National Semiconductor 
Logo National Semiconductor 





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SM73710 fiche technique
SM73710
October 5, 2011
2.7V, SOT-23 Temperature Sensor
General Description
The SM73710 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 SM73710'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 a negative supply. The nominal output voltage of the
SM73710 ranges from +174 mV to +1205 mV for a −40°C to
+125°C temperature range. The SM73710 is calibrated to
provide accuracies of ±2.0°C at room temperature and ±4°C
over the full −40°C to +125°C temperature range.
The SM73710's linear output, +424 mV offset, and factory
calibration simplify external circuitry required in a single sup-
ply environment where reading negative temperatures is re-
quired. Because the SM73710's quiescent current is less than
110 μA, self-heating is limited to a very low 0.1°C in still air in
the SOT-23 package. Shutdown capability for the SM73710
is intrinsic because its inherent low power consumption allows
it to be powered directly from the output of many logic gates.
Features
Renewable Energy Grade
Calibrated linear scale factor of +6.25 mV/°C
Rated for full −40°C to +125°C range
Suitable for remote applications
Available in SOT-23 package
Applications
Photovoltaic Electronics
Cellular Phones
Computers
Power Supply Modules
Battery Management
FAX Machines
Printers
HVAC
Disk Drives
Appliances
Key Specifications
Accuracy at 25°C: ±3.0°C (max)
Accuracy for −40°C to +125°C: ±4.0°C (max)
Temperature Slope: +6.25mV/°C
Power Supply Voltage Range: +2.7V to +10V
Current Drain @ 25°C:  110μA (max)
Nonlinearity: ±0.8°C (max)
Output Impedance:  800Ω (max)
Typical Application
Connection Diagram
SOT-23
VO = (+6.25 mV/°C × T °C) + 424 mV
Temperature (T)
+125°C
+100°C
+25°C
0°C
−25°C
−40°C
30159802
Typical VO
+1205 mV
+1049 mV
+580 mV
+424 mV
+268 mV
+174 mV
FIGURE 1. Full-Range Centigrade Temperature Sensor
(−40°C to +125°C) Operating from a Single Li-Ion Battery
Cell
© 2011 National Semiconductor Corporation 301598
30159801
Top View
See NS Package Number MF03A
www.national.com

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