+5V

SCL

GND

SDA

V+

SMBus

Controller

8

5

7

6

DX1

DX2

DX3

DX4

1

2

3

4

1 Channel Local

2 Channels Remote

TMP422-EP

www.ti.com

SBOS577

– SEPTEMBER 2011

±1°C REMOTE TEMPERATURE AND ±2.5°C LOCAL

TEMPERATURE SENSOR IN SOT23-8

Check for Samples: TMP422-EP

1

FEATURES

SUPPORTS DEFENSE, AEROSPACE AND

MEDICAL APPLICATIONS

234

•

SOT23-8 Package

•

Controlled Baseline

•

±1°C Remote Diode Sensor (Max)

•

One Assembly/Test Site

•

±2.5°C Local Temperature Sensor (Max)

•

One Fabrication Site

•

Series Resistance Cancellation

•

Available in Military (

–55°C to 125°C)

•

n-Factor Correction

•

Two-Wire/ SMBus

™ Serial Interface

•

Extended Product Life Cycle

•

Multiple Interface Addresses

•

Extended Product-Change Notification

•

Diode Fault Detection

•

Product Traceability

•

RoHS Compliant and NO Sb/Br

APPLICATIONS

•

Processor/FPGA Temperature Monitoring

•

•

Servers

•

Central Office Telecom Equipment

•

Storage Area Networks (SAN)

(1)

Additional temperature ranges available - contact factory

DESCRIPTION

The TMP422 is a remote temperature sensor monitor with a built-in local temperature sensor. The remote

temperature sensor diode-connected transistors are typically low-cost, NPN- or PNP-type transistors or diodes

that are an integral part of microcontrollers, microprocessors, or FPGAs.

Remote accuracy is

±1°C for multiple IC manufacturers, with no calibration needed. The two-wire serial interface

accepts SMBus write byte, read byte, send byte, and receive byte commands to configure the device.

The TMP422 includes series resistance cancellation, programmable non-ideality factor, wide remote temperature

measurement range (up to 150

°C), and diode fault detection.

The TMP422 is available in a SOT23-8 package.

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

DLP is a registered trademark of Texas Instruments.

3

SMBus is a trademark of Intel Corporation.

4

All other trademarks are the property of their respective owners.

PRODUCTION DATA information is current as of publication date.

Copyright

© 2011, 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.