TMP461

D+

D-

SCL

SDA

THERM

GND

V+

ALERT/THERM2

Processor or ASIC

SMBus

Controller

1

2

3

4

6

9

8

7

1.7 V to 3.6 V

1.7 V to 3.6 V

Built-In Thermal

Transistor, Diode

Overtemperature Shutdown

10

5

A1

A0

Product

Folder

Sample &

Buy

Technical

Documents

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Software

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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.

TMP461

SBOS722B – JUNE 2015 – REVISED AUGUST 2016

TMP461 High-Accuracy Remote and Local Temperature Sensor with

Pin-Programmable Bus Address

1

1 Features

1

•

Remote Diode Temperature Sensor Accuracy:

±0.75°C

•

Local Temperature Sensor Accuracy: ±1°C

•

Resolution for Local and Remote Channels:

0.0625°C

•

Supply and Logic Voltage Range: 1.7 V to 3.6 V

•

35-µA Operating Current (1 SPS),

3-µA Shutdown Current

•

Series Resistance Cancellation

•

η-Factor and Offset Correction

•

Programmable Digital Filter

•

Diode Fault Detection

•

Two-Wire and SMBus™ Serial Interface

Compatible with Pin-Programmable Address

•

10-Lead WQFN Package

2 Applications

•

Processor Temperature Monitoring

•

Telecommunication Equipment

•

Servers and Personal Computers

•

Precision Instruments

•

Test Equipment

•

Smart Batteries

•

Embedded Applications

•

LED Lighting Thermal Control

3 Description

The TMP461 device is a high-accuracy, low-power

remote temperature sensor monitor with a built-in

local temperature sensor. The remote temperature

sensors are typically low-cost discrete NPN or PNP

transistors, or substrate thermal transistors or diodes

that

are

integral

parts

of

microprocessors,

microcontrollers, or field-programmable gate arrays

(FPGAs). Temperature is represented as a 12-bit

digital code for both local and remote sensors, giving

a resolution of 0.0625°C. The two-wire serial interface

accepts the SMBus communication protocol with up

to nine different pin-programmable addresses.

Advanced

features

[such

as

series

resistance

cancellation, programmable nonideality factor (η-

factor),

programmable

offset,

programmable

temperature limits, and a programmable digital filter]

are combined to provide a robust thermal monitoring

solution with improved accuracy and noise immunity.

The TMP461 is ideal for multi-location, high-accuracy

temperature

measurements

in

a

variety

of

communication,

computing,

instrumentation,

and

industrial applications. The device is 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)

TMP461

WQFN (10)

2.00 mm × 2.00 mm

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

the end of the datasheet.

4 Simplified Block Diagram