FM51 Datasheet, PDF(1/6 Page) Fairchild Semiconductor – Low Voltage High Drive Temperature Sensor

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FM51 Datasheet, PDF (1/6 Pages) Fairchild Semiconductor – Low Voltage High Drive Temperature Sensor

April 2001

FM51

Low Voltage High Drive

Temperature Sensor

General Description

The FM51 is a high-precision CMOS temperature sensor that

provides a cost-effective solution for applications requiring high-

accuracy temperature monitoring. The FM51 is ideally suited for

applications requiring high drive current. The FM51 output voltage

ramp is extremely linear and has a slope of 10mV/Â°C. It is typically

accurate to Â±1Â°C over a temperature range of -40Â°C to 125Â°C and

has a typical room temperature accuracy of Â±0.5Â°C. The output

voltage characteristic for the FM51 is illustrated in Figure 1.

The FM51 does not require external calibration. Factory calibra-

tion of the FM51 is performed using a low-cost trimming technique.

The FM51 is available in 3-pin SOT-23 surface mount packages.

Features

I Precision Calibrated to Â±1Â°C (Typical)

I Temperature Range: -40Â°C to 125Â°C

I Extremely Linear Output Ramp (10mV/Â°C)

I Low Output Impedance for 1mA Load

I Output Ramp is Calibrated in Degrees Celsius

I Low Operating Current <130ÂµA (no load)

I Low Self Heating (0.2Â°C Max in Still Air)

I Operating Voltage Range: +2.7V to +6.0V

I Uses a Single Positive Supply

I Non-linearity â¤ 0.8Â°C

Applications

I Computers

I Battery Management

I FAX Machines/Printers/Copiers

I Portable Medical Instruments

I HVAC

I Power Supply Modules

I Disk Drives

I Automotive Control Circuits

Typical Applications

FM51

1ÂµF

VTEMP

100K

10K

3.9K

REF

1.75V

Serial

Analog-to-Digital

Converter

Adjustable

Shunt Voltage

Reference

SERIAL

DATA OUT

CLOCK

ENABLE

Serial Output Temperature to Digital Converter (Full Scale = +125Â°C)

FM51 Rev. C

www.fairchildsemi.com

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