DXP

DXN

SCL

SDA

THERM

GND

V+

ALERT / THERM2

Processor or

ASIC

SMBus

Controller

1

2

3

4

5

8

7

6

TMP451-Q1

1.7V to 3.6V

1.7V to 3.6V

Built-in Thermal

Transistor/Diode

Overtemperature Shutdown

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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.

TMP451-Q1

SLOS877B – OCTOBER 2014 – REVISED JUNE 2019

TMP451-Q1 ±1°C Remote and Local Temperature Sensor With η-Factor and Offset

Correction, Series-Resistance Cancellation, and Programmable Digital Filter

1

1 Features

1

•

Qualified for automotive applications

•

AEC-Q100 qualified with the following results:

–

Device temperature grade 1: –40°C to 125°C

ambient operating temperature range

•

±1°C accuracy for local and remote diode sensors

•

0.0625°C resolution for local and remote channels

•

1.7-V to 3.6-V supply and logic voltage range

•

27-µA operating current, 3-µA shutdown current

•

Series resistance cancellation

•

η-factor and offset correction

•

Programmable digital filter

•

Diode fault detection

•

Two-wire and SMBus™ serial interface

•

8-pin WSON (WDFN) package

2 Applications

•

Automotive infotainment systems

•

ECU processor temperature monitoring

•

TCM processor temperature monitoring

•

BCM processor temperature monitoring

•

LED headlight thermal control

3 Description

The TMP451-Q1 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 FPGAs. The

temperature is represented as a 12-bit digital code for

both the local and the remote sensors, giving a

resolution of 0.0625°C. The temperature accuracy is

±1°C (maximum) in the typical operating range for the

local and the remote temperature sensors. The two-

wire

serial

interface

accepts

the

SMBus

communication protocol.

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 TMP451-Q1 device is ideal for multi-location,

high-accuracy

temperature

measurements

in

a

variety of automotive sub-systems. 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)

TMP451-Q1

WSON (8)

2.00 mm × 2.00 mm

2.50 mm × 2.50 mm

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

the end of the datasheet.

Typical Application