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

−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

n

Temperature Slope

+15.6 mV/˚C

n

Power Supply Voltage Range

+2.7V to +10V

n

130 µA (max)

n

Nonlinearity

n

Output Impedance

4.7 k

Ω (max)

Connection Diagram

SOT-23

10089301

Top View

See NS Package Number mf03a

Ordering Information

Order

Device

Number

Top Mark

Supplied As

LM62BIM3

T7B

1000 Units, Tape and Reel

LM62BIM3X

T7B

3000 Units, Tape and Reel

LM62CIM3

T7C

1000 Units, Tape and Reel

LM62CIM3X

T7C

3000 Units, Tape and Reel

Typical Application

10089302

Temperature (T)

Typical V

O

+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

August 2005

© 2005 National Semiconductor Corporation

DS100893

www.national.com