1FEATURES

2• Accurately Senses Die Temperature of Remote

ICs or Diode Junctions

• Uses TruTherm Technology for Precision

“Thermal Diode” Temperature Measurement

• Thermal Diode Input Stage with Analog

Filtering

• Thermal Diode Digital Filtering

• Intel Processor on 65nm or 90nm Process or

2N3904 Non-Ideality Selection

• Remote Diode Fault Detection

• On-board Local Temperature Sensing

• Remote Temperature Readings Without Digital

Filtering:

– 0.125 °C LSb

– 10-bits Plus Sign or 11-bits Programmable

Resolution

– 11-bits Resolves Temperatures Above

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

KEY SPECIFICATIONS

• Remote Diode Temperature Accuracy

– TA = 20°C to 40°C, TD = 45°C to 85°C ±1.25

°C (Max)

– TA = 0°C to 85°C, TD = 25°C to 140°C ±2.5 °C

(Max)

• Local Temperature Accuracy

– TA = 0°C to 85°C ±3.0 °C (Max)

• Supply Voltage 3.0 V to 3.6 V

• Average Supply Current 471 μA (Typ)

APPLICATIONS

• Processor/Computer System Thermal

Management

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

Server)

• Electronic Test Equipment

• Office Electronics

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.