SM73710 Datasheet, PDF (2/12 Pages) Texas Instruments – SM73710 2.7V, SOT-23 Temperature Sensor

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
V_O = (+6.25 mV/°C × T °C) + 424 mV
Temperature (T)
+125°C
+100°C
+25°C
0°C
−25°C
−40°C
30159802
Typical V_O
+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
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