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LM62

2.7V, 15.6 mV/˚C SOT-23 Temperature Sensor

General Description

The LM62 is a precision integrated-circuit temperature sen-

sor that can sense a 0˚C to +90˚C temperature range while

operating from a single +3.0V supply. The LM62’s output

voltage is linearly proportional to Celsius (Centigrade) tem-

perature (+15.6 mV/˚C) and has a DC offset of +480 mV.

The offset allows reading temperatures down to 0˚C without

the need for a negative supply. The nominal output voltage of

the LM62 ranges from +480 mV to +1884 mV for a 0˚C to

+90˚C temperature range. The LM62 is calibrated to provide

accuracies of

2.0˚C at room temperature and +2.5˚C/

−2.0˚C over the full 0˚C to +90˚C temperature range.

The LM62’s linear output, +480 mV offset, and factory cali-

bration simplify external circuitry required in a single supply

environment where reading temperatures down to 0˚C is

required. Because the LM62’s quiescent current is less than

130 µA, self-heating is limited to a very low 0.2˚C in still air.

Shutdown capability for the LM62 is intrinsic because its

inherent low power consumption allows it to be powered

directly from the output of many logic gates.

Features

n Calibrated linear scale factor of +15.6 mV/˚C

n Rated for full 0˚C to +90˚C range with 3.0V supply

n Suitable for remote applications

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

2.0 or

3.0˚C (max)

n Temperature Slope +15.6 mV/˚C

n Power Supply Voltage Range +2.7V to +10V

n Current Drain

25˚C 130 µA (max)

n Nonlinearity

0.8˚C (max)

n Output Impedance 4.7 kΩ (max)

Connection Diagram

Ordering Information

Order SOT-23

Number Device Supplied As

Marking

LM62BIM3 T7B 1000 Units on Tape and Reel

LM62BIM3X T7B 3000 Units on Tape and Reel

LM62CIM3 T7C 1000 Units on Tape and Reel

LM62CIM3X T7C 3000 Units on Tape and Reel

Typical Application

SOT-23

DS100893-1

Top View

See NS Package Number MA03B

DS100893-2

= (+15.6 mV/˚C x T˚C) + 480 mV

Temperature (T) Typical V

+90˚C +1884 mV

+70˚C +1572 mV

+25˚C 870 mV

0˚C +480 mV

FIGURE 1. Full-Range Centigrade Temperature Sensor

(0˚C to +90˚C) Stabilizing a Crystal Oscillator

June 1999

LM62 2.7V, 15.6 mV/˚C, SOT-23 Temperature Sensor

1 2 3 4 5 6 7

Indice de contenidos

Pagina 1 - DS100893-2

LM622.7V, 15.6 mV/˚C SOT-23 Temperature SensorGeneral DescriptionThe LM62 is a precision integrated-circuit temperature sen-sor that can sense a 0˚C t

Pagina 2 - Electrical Characteristics

Absolute Maximum Ratings (Note 1)Supply Voltage +12V to −0.2VOutput Voltage (+VS+ 0.6V) to−0.6VOutput Current 10 mAInput Current at any pin (Note 2) 5

Pagina 3 - Figure 2

Typical Performance Characteristics To generate these curves the LM62 was mounted to a printedcircuit board as shown inFigure 2.Thermal ResistanceJunc

Pagina 4 - 1.0 Mounting

Typical Performance Characteristics To generate these curves the LM62 was mounted to aprinted circuit board as shown inFigure 2. (Continued)1.0 Mounti

Pagina 5 - 2.0 Capacitive Loads

1.0 Mounting (Continued)The table shown inFigure 3summarizes the rise in dietemperature of the LM62 without any loading, and the ther-mal resistance f

Pagina 6 - 3.0 Applications Circuits

3.0 Applications CircuitsDS100893-18FIGURE 7. Centigrade ThermostatDS100893-19FIGURE 8. Conserving Power Dissipation with ShutdownLM62www.national.com

Pagina 7 - NS Package Number MA03B

Physical Dimensions inches (millimeters) unless otherwise notedLIFE SUPPORT POLICYNATIONAL’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENT

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