LM95213

www.ti.com

SNIS147A – MARCH 2007 – REVISED MARCH 2013

2-Diode Input and Local Digital Temperature Sensor with Two-Wire Interface and TCRIT

Outputs

Check for Samples: LM95213

1

FEATURES

DESCRIPTION

The LM95213 is an 11-bit digital temperature sensor

23

•

Accurately Senses Die Temperature of 2

with a 2-wire System Management Bus (SMBus)

Remote ICs or Diode Junctions and Local

interface that can monitor the temperature of two

Temperature

remote diodes as well as its own temperature. The

•

0.125°C LSb Temperature Resolution

LM95213 can be used to very accurately monitor the

temperature of up to two external devices such as

•

0.03125°C LSb Remote Temperature

microprocessors,

graphics

processors

or

diode-

Resolution with Digital Filter Enabled

connected 2N3904s.

•

+127.875°C/–128°C and 0°C/255°C Remote

Ranges

The LM95213 reports temperature in two different

formats for +127.875°C/–128°C range and 0°C/255°C

•

Programmable Digital Filters and Analog Front

range. The LM95213 TCRIT1, TCRIT2 and TCRIT3

End Filter

outputs are triggered when any unmasked channel

•

Remote Diode Fault Detection, Model

exceeds its corresponding programmable limit and

Selection and Offset Correction

can be used to shutdown the system, to turn on the

system fans or as a microcontroller interrupt function.

•

Mask and Status Register Support

The current status of the TCRIT1, TCRIT2 and

•

3 Programmable TCRIT Outputs with

TCRIT3 pins can be read back from the status

Programmable Shared Hysteresis

registers. Mask registers are available for further

•

Programmable Conversion Rate and Shutdown

control of the TCRIT outputs.

Mode One-Shot Conversion Control

The LM95213's remote temperature channels have

•

SMBus 2.0 Compatible Interface, Supports

programmable digital filters to minimize unwanted

TIMEOUT

TCRIT

events

when

temperature

spikes

are

encountered.

•

Three-Level Address Pin

•

14-Pin WSON Package

For optimum flexibility and accuracy each LM95213

channel

includes

offset

correction

registers

for

targeting diodes other than the 2N3904. A three level

APPLICATIONS

address pin allows connection of up to 3 LM95213s

•

Processor/Computer System Thermal

to the same SMBus master. The LM95213 includes

Management (e.g. Laptop, Desktop,

power saving functions such as: programmable

Workstations, Server)

conversion rate, shutdown mode, and turn off of

•

Electronic Test Equipment

unused channels.

•

Office Electronics

Table 1. Key Specifications

VALUE

UNIT

Local Temperature Accuracy

±2.0

°C (max)

Remote Diode Temperature Accuracy

±1.1

°C (max)

Supply Voltage

3.0 to 3.6

V

Average Supply Current (1Hz conversion rate)

0.57

mA (typ)

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

TruTherm is a trademark of Texas Instruments.

3

All other trademarks are the property of their respective owners.

PRODUCTION DATA information is current as of publication date.

Copyright © 2007–2013, 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.