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LM61

National Semiconductor
Part Number LM61
Manufacturer National Semiconductor
Description 2.7V/ SOT-23 or TO-92 Temperature Sensor
Published Mar 22, 2005
Detailed Description LM61 2.7V, SOT-23 or TO-92 Temperature Sensor June 1999 LM61 2.7V, SOT-23 or TO-92 Temperature Sensor General Descript...
Datasheet PDF File LM61 PDF File

LM61
LM61


Overview
LM61 2.
7V, SOT-23 or TO-92 Temperature Sensor June 1999 LM61 2.
7V, SOT-23 or TO-92 Temperature Sensor General Description 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.
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.
Applications n n n n n n n n n Cellular Phones Computers Power Supply Modules Battery Management FAX Machines Printers HVAC Disk Drives Appliances Key Specifications n Accuracy at 25˚C n Accuracy for −30˚C to +100˚C n Accuracy for −25˚C to +85˚C n Temperature Slope n Power Supply Voltage Range n Current Drain @ 25˚C n Nonlinearity n Output Impedance ± 2.
0 or ± 3.
0˚C (max) ± 4.
0˚C (max) ± 3.
0˚C (max) +10 mV/˚C +2.
7V to +10V 125 µA (max) Features n Calibrated linear scale factor of +10 mV/˚C n Rated for full −30˚ to +100˚C range n Suitable for remote applications ± 0.
8˚C (max) 800 Ω (max) Typical Application DS012897-2 VO = (+10 mV/˚C x T ˚C) + 600 mV Temperature (T) +100˚C +85˚C +25˚C 0˚C −25˚C −30˚C Typical VO +1600 mV +1450 mV +850 mV +600 mV +350 mV +300 mV FIGURE 1.
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