REV. C

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a

TMP35/TMP36/TMP37

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.

Tel: 781/329-4700

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Fax: 781/326-8703

© Analog Devices, Inc., 2002

Low Voltage Temperature Sensors

FUNCTIONAL BLOCK DIAGRAM

+Vs (2.7V to 5.5V)

SHUTDOWN

TMP35/

TMP36/

TMP37

PACKAGE TYPES AVAILABLE

RT-5 (SOT-23)

1

2

3

5

4

TOP VIEW

(Not to Scale)

NC = NO CONNECT

SHUTDOWN

GND

NC

RN-8 (SOIC)

1

2

3

4

8

7

6

5

TOP VIEW

(Not to Scale)

NC = NO CONNECT

SHUTDOWN

NC

NC

NC

NC

GND

TO-92

1

3

2

BOTTOM VIEW

(Not to Scale)

FEATURES

Low Voltage Operation (2.7 V to 5.5 V)

Calibrated Directly in C

10 mV/ C Scale Factor (20 mV/ C on TMP37)

2 C Accuracy over Temperature (Typ)

0.5 C Linearity (Typ)

Stable with Large Capacitive Loads

Specified –40 C to +125 C, Operation to +150 C

Less than 50

A Quiescent Current

Shutdown Current 0.5

A Max

Low Self-Heating

APPLICATIONS

Environmental Control Systems

Thermal Protection

Industrial Process Control

Fire Alarms

Power System Monitors

CPU Thermal Management

PRODUCT DESCRIPTION

The TMP35, TMP36, and TMP37 are low voltage, precision

centigrade temperature sensors. They provide a voltage output

that is linearly proportional to the Celsius (Centigrade) tem-

perature. The TMP35/TMP36/TMP37 do not require any

external calibration to provide typical accuracies of

±1°C at

+25

°C and ±2°C over the –40°C to +125°C temperature range.

The low output impedance of the TMP35/TMP36/TMP37 and

its linear output and precise calibration simplify interfacing to

temperature control circuitry and A/D converters. All three

devices are intended for single-supply operation from 2.7 V to

5.5 V maximum. Supply current runs well below 50

µA, providing

very low self-heating—less than 0.1

°C in still air. In addition, a

shutdown function is provided to cut supply current to less

than 0.5

µA.

The TMP35 is functionally compatible with the LM35/LM45 and

provides a 250 mV output at 25

°C. The TMP35 reads temperatures

from 10

°C to 125°C. The TMP36 is specified from –40°C to

+125

°C, provides a 750 mV output at 25°C, and operates to

+125

°C from a single 2.7 V supply. The TMP36 is functionally

compatible with the LM50. Both the TMP35 and TMP36 have

an output scale factor of 10 mV/

°C. The TMP37 is intended for

applications over the range 5

°C to 100°C and provides an output

scale factor of 20 mV/

°C. The TMP37 provides a 500 mV output

at 25

°C. Operation extends to 150°C with reduced accuracy for all

devices when operating from a 5 V supply.

The TMP35/TMP36/TMP37 are all available in low cost 3-lead

TO-92, SOIC-8, and 5-lead SOT-23 surface-mount packages.