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

Product

Folder

Sample &

Buy

Technical

Documents

Tools &

Software

Support &

Community

TMP451

SBOS686A – JUNE 2013 – REVISED DECEMBER 2014

TMP451 ±1°C Remote and Local Temperature Sensor With

η-Factor and Offset Correction,

Series-Resistance Cancellation, and Programmable Digital Filter

1 Features

3 Description

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

1

•

±1°C Accuracy for Local and Remote Diode

remote temperature sensor monitor with a built-in

Sensors

local temperature sensor. The remote temperature

•

0.0625°C Resolution for Local and Remote

sensors 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 Current

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

•

Series Resistance Cancellation

and remote sensors, giving a resolution of 0.0625°C.

•

η-Factor and Offset Correction

The temperature accuracy is ±1°C (maximum) in the

typical operating range for the local and the remote

•

Programmable Digital Filter

temperature sensors. The two-wire serial interface

•

Diode Fault Detection

accepts the SMBus communication protocol.

•

Two-Wire and SMBus™ Serial Interface

Advanced

features

such

as

series

resistance

•

8-Lead WSON (WDFN) Package

cancellation, programmable nonideality factor (

η-

factor),

programmable

offset,

programmable

2 Applications

temperature limits, and a programmable digital filter

are combined to provide a robust thermal monitoring

•

Processor and FPGA Temperature Monitoring

solution with improved accuracy and noise immunity.

•

Smart Phones and Tablets

The TMP451 device is ideal for high-accuracy

•

Servers, Desktops, and Notebooks

temperature measurements in multiple locations and

•

Telecom Equipment and Storage Area Networks

in a variety of automotive subsystems. The device is

(SANs)

specified for operation over a supply voltage range of

1.7 V to 3.6 V and a temperature range of –40°C to

125°C.

Device Information(1)

PART NUMBER

PACKAGE

BODY SIZE (NOM)

TMP451

WSON (8)

2.00 mm × 2.00 mm

(1) For all available packages, see the orderable addendum at

the end of the data sheet.

Simplified Schematic

1

An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,

intellectual property matters and other important disclaimers. PRODUCTION DATA.