D+

D

SCL

SDA

THERM

GND

V+

ALERT / THERM2

Processor or

ASIC

SMBus

Controller

1

2

3

4

5

8

7

6

TMP451

1.7 V to 3.6 V

Built-in Thermal

Transistor/Diode

Overtemperature Shutdown

1.7 V to 3.6 V

TMP451

www.ti.com

SBOS686 – JUNE 2013

±1°C Remote and Local Temperature Sensor with

η-Factor and Offset Correction,

Series Resistance Cancellation, and Programmable Digital Filter

Check for Samples: TMP451

1

FEATURES

DESCRIPTION

The TMP451 is a high-accuracy, low-power remote

23

•

±1°C Accuracy for Local and Remote Diode

temperature sensor monitor with a built-in local

Sensors

temperature sensor. The remote temperature sensors

•

0.0625°C Resolution for Local and Remote

are

typically

low-cost

discrete

NPN

or

PNP

Channels

transistors, or substrate thermal transistors or diodes

that

are

integral

parts

of

microprocessors,

•

1.7-V to 3.6-V Supply and Logic Voltage Range

microcontrollers, or FPGAs. The temperature is

•

27-µA Operating Current, 3-µA Shutdown

represented as a 12-bit digital code for both the local

Current

and the remote sensors, giving a resolution of

•

Series Resistance Cancellation

0.0625°C. The temperature accuracy is ±1°C (max) in

the typical operating range for the local and the

•

η-Factor and Offset Correction

remote temperature sensors. The two-wire serial

•

Programmable Digital Filter

interface accepts the SMBus communication protocol.

•

Diode Fault Detection

Advanced

features

such

as

series

resistance

•

Two-Wire and SMBus™ Serial Interface

cancellation, programmable nonideality factor (

η-

•

8-Lead WSON (WDFN) Package

factor),

programmable

offset,

programmable

temperature limits, and a programmable digital filter

APPLICATIONS

are combined to provide a robust thermal monitoring

solution with improved accuracy and noise immunity.

•

Processor/FPGA Temperature Monitoring

The TMP451 is ideal for high-accuracy temperature

•

Smartphones and Tablets

measurements in a variety of consumer, computing,

•

Servers, Desktops, and Notebooks

industrial, automotive, and communications systems.

•

Telecom Equipment and Storage Area

It is specified for operation over a supply voltage

Networks (SAN)

range of 1.7 V to 3.6 V and a temperature range of

–40°C to +125°C.

•

Automotive and Embedded Systems

1

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of

Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

2

SMBus is a trademark of Intel Corporation.

3

All other trademarks are the property of their respective owners.

PRODUCTION DATA information is current as of publication date.

Copyright © 2013, Texas Instruments Incorporated

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.