Datasheet > LM95231CIMM-1

LM95231CIMM-1

更新时间： 2024-11-24 03:44:07

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
20页	705K
描述
Precision Dual Remote Diode Temperature Sensor with SMBus Interface and TruTherm Technology

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LM95231CIMM-1 数据手册

August 2006

LM95231

Precision Dual Remote Diode Temperature Sensor with

™

SMBus Interface and TruTherm Technology

n Remote diode fault detection

n On-board local temperature sensing

n Remote temperature readings without digital filtering:

General Description

The LM95231 is a precision dual remote diode temperature

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

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

SMBus 2.0. The LM95231 can sense three temperature

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

as two diode connected transistors. The LM95231 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 con-

nected 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, 90nm and below. The LM95231 supports user

— 0.125 ˚C LSb

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

— 11-bits resolves temperatures above 127 ˚C

n 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

n Local temperature readings:

— 0.25 ˚C

— 9-bits plus sign

n Status register support

n Programmable conversion rate allows user optimization

of power consumption

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

processor on 90nm process or 2N3904.

n Shutdown mode one-shot conversion control

n SMBus 2.0 compatible interface, supports TIMEOUT

n 8-pin MSOP package

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 Temperature Accuracy

Local Temperature Accuracy

Supply Voltage

0.75˚C (max)

3.0˚C (max)

3.0V to 3.6V

402µA (typ)

Features

Supply Current

n Accurately senses die temperature of remote ICs or

diode junctions

n Uses TruTherm technology for precision “thermal diode”

temperature measurement

n Thermal diode input stage with analog filtering

n Thermal diode digital filtering

n Intel Pentium 4 processor on 90nm process or 2N3904

non-ideality selection

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 Philips Corporation.

Pentium^®is a registered trademark of Intel Corporation.

DS201202

www.national.com

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与LM95231CIMM-1相关器件

型号	品牌	获取价格	描述	数据表
LM95231CIMM-1/NOPB	TI	获取价格	Precision Dual Remote Diode Temperature Senso
LM95231CIMM-2	NSC	获取价格	Precision Dual Remote Diode Temperature Sensor with SMBus Interface and TruTherm Technolog
LM95231CIMM-2/NOPB	TI	获取价格	Precision Dual Remote Diode Temperature Senso
LM95231CIMMX	NSC	获取价格	Precision Dual Remote Diode Temperature Sensor with SMBus Interface and TruTherm Technolog
LM95231CIMMX/NOPB	TI	获取价格	Precision Dual Remote Diode Temperature Senso
LM95231CIMMX-1	TI	获取价格	Precision Dual Remote Diode Temperature Sensor with SMBus Interface and TruTherm? Technolo
LM95231CIMMX-1	NSC	获取价格	Precision Dual Remote Diode Temperature Sensor with SMBus Interface and TruTherm Technolog
LM95231CIMMX-1/NOPB	TI	获取价格	Dual Remote and Local Temperature Sensor with TruTherm Technology and SMBus Interface 8-VS
LM95231CIMMX-2	NSC	获取价格	Precision Dual Remote Diode Temperature Sensor with SMBus Interface and TruTherm Technolog
LM95231CIMMX-2	TI	获取价格	Precision Dual Remote Diode Temperature Sensor with SMBus Interface and TruTherm? Technolo

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