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LM95241

www.ti.com

SNIS143E – AUGUST 2006 – REVISED MARCH 2013

LM95241 Dual Remote Diode Temperature Sensor with SMBus Interface and TruTherm?

Technology (65nm/90nm)

Check for Samples: LM95241

FEATURES

KEY SPECIFICATIONS

Accurately Senses Die Temperature of Remote

Remote Diode Temperature Accuracy

ICs or Diode Junctions

– T A = 20°C to 40°C, T D = 45°C to 85°C ±1.25

Uses TruTherm Technology for Precision

“Thermal Diode” Temperature Measurement

Thermal Diode Input Stage with Analog

°C (Max)

– T A = 0°C to 85°C, T D = 25°C to 140°C ±2.5 °C

(Max)

Filtering

Local Temperature Accuracy

Thermal Diode Digital Filtering

– T A = 0°C to 85°C ±3.0 °C (Max)

Intel Processor on 65nm or 90nm Process or

2N3904 Non-Ideality Selection

Remote Diode Fault Detection

Supply Voltage 3.0 V to 3.6 V

Average Supply Current 471 μ A (Typ)

On-board Local Temperature Sensing

APPLICATIONS

Remote Temperature Readings Without Digital

Filtering:

– 0.125 °C LSb

– 10-bits Plus Sign or 11-bits Programmable

Resolution

– 11-bits Resolves Temperatures Above

Processor/Computer System Thermal

Management

– (e.g. Laptop, Desktop, Workstations,

Server)

Electronic Test Equipment

Office Electronics

127 °C

Remote Temperature Readings with Digital

Filtering:

– 0.03125 °C LSb with Filtering

– 12-bits Plus Sign or 13-bits Programmable

Resolution

– 13-bits Resolves Temperatures Above

127 °C

Local Temperature Readings:

– 0.25 °C

– 9-bits Plus Sign

Status Register Support

Programmable Conversion Rate Allows User

Optimization of Power Consumption

Shutdown Mode One-shot Conversion Control

SMBus 2.0 Compatible Interface, Supports

TIMEOUT

8-pin VSSOP Package

DESCRIPTION

The LM95241 is a precision dual remote diode

temperature sensor (RDTS) that uses TI's TruTherm

technology. The 2-wire serial interface of the

LM95241 is compatible with SMBus 2.0. The

LM95241 can sense three temperature zones, it can

measure the temperature of its own die as well as

two diode connected transistors. The LM95241

includes digital filtering and an advanced input stage

that includes analog filtering and TruTherm

technology that reduces processor-to-processor non-

ideality spread. The diode connected transistors can

be a “thermal diode” as found in Intel and AMD

processors or can simply be a diode connected

MMBT3904 transistor. TruTherm technology allows

accurate measurement of “thermal diodes” found on

small geometry processes such as 90nm and 65nm.

The LM95241 supports user selectable thermal diode

non-ideality of either Intel processor on 90nm or

65nm process or 2N3904.

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.

All trademarks are the property of their respective owners.

PRODUCTION DATA information is current as of publication date.

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.

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