LM95231

更新时间： 2024-09-09 22:47:03

品牌	Logo	应用领域
美国国家半导体 - NSC		二极管传感器温度传感器
页数	文件大小	规格书
4页	464K
描述
TruTherm Precision Dual Remote Diode Temperature Sensor with SMBus Interface

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LM95231 数据手册

ADVANCE INFORMATION

February 2005

LM95231

™

TruTherm Precision Dual Remote Diode Temperature

Sensor with SMBus Interface

n Remote temperature readings without digital filtering:

— 0.125 ˚C LSb

General Description

The LM95231 is a precision dual remote diode temperature

— 10-bits plus sign or 11-bits programmable resolution

sensor (RDTS) that uses National’s TruTherm technology.

— 11-bits resolves temperatures above 127 ˚C

The 2-wire serial interface of the LM95231 is compatible with

n Remote temperature readings with digital filtering:

— 0.03125 ˚C LSb with filtering

SMBus 2.0. The LM95231 can sense three temperature

zones, it can measure the temperature of its own die as well

— 12-bits plus sign or 13-bits programmable resolution

as two diode connected transistors. The LM95231 includes

— 13-bits resolves temperatures above 127 ˚C

digital filtering and an advanced input stage that includes

n Local temperature readings:

analog filtering and TruTherm technology that reduces non-

— 0.25 ˚C

ideality processor to processor spread. The diode connected

— 9-bits plus sign

transistors can be a “thermal diode” as found in Intel and

n Status register support

n Programmable conversion rate allows user optimization

of power consumption

n Shutdown mode one-shot conversion control

n SMBus 2.0 compatible interface, supports TIMEOUT

n 8-pin MSOP package

AMD processors or can simply be a diode connected

MMBT3904 transistor. TruTherm technology allows accurate

measurement of “thermal diodes” found on small geometry

processes, 90nm and below. The LM95231 supports user

selectable thermal diode non-ideality of either a Pentium^®

processor in the 90nm process or 2N3904.

The LM95231 resolution format for remote temperature

readings can be programmed to be 11-bits signed or un-

signed with the digital filtering disabled. When the filtering is

enabled the resolution increases to 13-bits signed or un-

signed. In the unsigned mode the LM95231 remote diode

readings can resolve temperatures above 127˚C. Local tem-

perature readings have a resolution of 9-bits plus sign.

Key Specifications

Remote Diode Temperature Accuracy

T_A=30˚C to 50˚C, T_D=45˚C to 85˚C

T_A=0˚C to 85˚C, T_D=25˚C to 140˚C

Local Temperature Accuracy

T_A=0˚C to 85˚C

0.75 ˚C (max)

2.0 ˚C (max)

3.0 ˚C (max)

3.0 V to 3.6 V

2 mA (typ)

Features

Supply Voltage

n Accurately senses die temperature of remote ICs or

diode junctions

Supply Current

n Uses TruTherm technology for precision “thermal diode”

temperature measurement

n Thermal diode input stage with analog filtering

n Thermal diode digital filtering

n Pentium 4 90nm or 2N3904 non-ideality selection

n Remote diode fault detection

n On-board local temperature sensing

Applications

n Processor/Computer System Thermal Management

(e.g. Laptop, Desktop, Workstations, Server)

n Electronic Test Equipment

n Office Electronics

Connection Diagram

MSOP-8

20120202

TOP VIEW

™

TruTherm is a trademark of National Semiconductor Corporation.

I2C^®is a registered trademark of Phillips Corporation.

™

Pentium is a trademark of Intel Corporation.

DS201202

www.national.com

12 3 4

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与LM95231相关器件

型号	品牌	获取价格	描述	数据表
LM95231_06	NSC	获取价格	Precision Dual Remote Diode Temperature Sensor with SMBus Interface and TruTherm Technolog
LM95231_15	TI	获取价格	Precision Dual Remote Diode Temperature Senso
LM95231BIMM	NSC	获取价格	Precision Dual Remote Diode Temperature Sensor with SMBus Interface and TruTherm Technolog
LM95231BIMM	TI	获取价格	Precision Dual Remote Diode Temperature Sensor with SMBus Interface and TruTherm? Technolo
LM95231BIMM/NOPB	TI	获取价格	Dual Remote and Local Temperature Sensor with TruTherm Technology and SMBus Interface 8-VS
LM95231BIMM-1	NSC	获取价格	Precision Dual Remote Diode Temperature Sensor with SMBus Interface and TruTherm Technolog
LM95231BIMM-1	TI	获取价格	Switch/Digital Output Temperature Sensor, DIGITAL TEMP SENSOR-SERIAL, 13BIT(s), 0.75Cel, S
LM95231BIMM-1/NOPB	TI	获取价格	Precision Dual Remote Diode Temperature Senso
LM95231BIMM-2	TI	获取价格	Switch/Digital Output Temperature Sensor, DIGITAL TEMP SENSOR-SERIAL, 13BIT(s), 0.75Cel, S
LM95231BIMM-2	NSC	获取价格	Precision Dual Remote Diode Temperature Sensor with SMBus Interface and TruTherm Technolog

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