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FM20

Ultra-Low-Power Analog Temperature Sensor

Fairchild Semiconductor 

www.fairchildsemi.com

FM20

Ultra-Low-Power Analog Temperature Sensor

Features

• Analog Output, -11.77mV/°C

• Range, -55 to 130°C

• Accuracy, ±1°C at 25°C

• Supply Current, 9µA typical

• Output Drive, 1µA

• Self-heating < 0.021°C

• Operating Voltage: +2.4V to +6V

Applications

• Mobile Phones

• Computers

• Battery Management

• Office Equipment

• HVAC

• Power Supply Modules

• Disk Drives

• Automotive

Thermal Response

VOUT (mV)

1863.9

Description

As a precision CMOS temperature sensor, the FM20 is

cost-effective for accurate low-power temperature

monitoring applications. Output voltage versus temperature

is extremely linear. With no load, the supply current is

typically 1µA. For normal operation, the load on VOUT

should be 5MΩ or less.

In a typical application, a remotely mounted FM20 is

monitored by a microcontroller with an analog A/D

converter input. Alternatively, the FM20 can drive a

comparator with a high impedance input.

Accuracy is typically ±1°C at room temperature; and better

than ±2.5°C from 0 to 50°C.

Available packages are surface mount 5-pin SC70 and 3-pin

SOT-23.

-50 -40 -25

391

0

25

50

Temperature (˚C)

75

100

125

VOUT – 1863.9mV

Temperature (˚C) =

–11.77mV/˚C

FM20 Output Voltage vs. Temperature

REV. 1.0.6 1/9/03

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