LM95221

更新时间： 2024-02-28 02:24:49

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
16页	279K
描述
Dual Remote Diode Digital Temperature Sensor with SMBus Interface

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中文翻译

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数据手册

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LM95221 数据手册

May 2004

LM95221

Dual Remote Diode Digital Temperature Sensor with

SMBus Interface

— 11-bits resolves temperatures above 127 ˚C

n Local temperature readings:

General Description

The LM95221 is a dual remote diode temperature sensor in

— 0.25 ˚C

an 8-lead MSOP package. The 2-wire serial interface of the

— 9-bits plus sign

LM95221 is compatible with SMBus 2.0. The LM95221 can

sense three temperature zones, it can measure the tempera-

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

ture of its own die as well as two diode connected transis-

tors. The diode connected transistors can be a thermal diode

as found in Pentium and AMD processors or can simply be a

diode connected MMBT3904 transistor. The LM95221 reso-

lution format for remote temperature readings can be pro-

grammed to be 10-bits plus sign or 11-bits unsigned. In the

unsigned mode the LM95221 remote diode readings can

resolve temperatures above 127˚C. Local temperature read-

ings have a resolution of 9-bits plus sign.

Key Specifications

Local Temperature Accuracy

The temperature of any ASIC can be accurately determined

using the LM95221 as long as a dedicated diode (semicon-

ductor junction) is available on the target die. The LM95221

remote sensor accuracy of 1˚C is factory trimmed for a

series resistance of 2.7 ohms and 1.008 non-ideality factor.

T_A=0˚C to 85˚C

3.0 ˚C (max)

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

Supply Voltage

1.0 ˚C (max)

3.0 ˚C (max)

3.0 V to 3.6 V

2 mA (typ)

Features

Supply Current

n Accurately senses die temperature of remote ICs or

diode junctions

Applications

n Remote diode fault detection

n Processor/Computer System Thermal Management

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

n Electronic Test Equipment

n On-board local temperature sensing

n Remote temperature readings:

— 0.125 ˚C LSb

n Office Electronics

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

Simplified Block Diagram

20094301

™

Pentium is a trademark of Intel Corporation.

DS200943

www.national.com

12 3 4 5 6 7...16

中文翻译

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与LM95221相关器件

型号	品牌	获取价格	描述	数据表
LM95221_15	TI	获取价格	Dual Remote Diode Digital Temperature Sensor with SMBus Interface
LM95221CIMM	NSC	获取价格	Dual Remote Diode Digital Temperature Sensor with SMBus Interface
LM95221CIMM/NOPB	TI	获取价格	Dual Remote Diode Digital Temperature Sensor with SMBus Interface
LM95221CIMMX	NSC	获取价格	Dual Remote Diode Digital Temperature Sensor with SMBus Interface
LM95221CIMMX/NOPB	TI	获取价格	Dual Remote Diode Digital Temperature Sensor with SMBus Interface
LM95231	NSC	获取价格	TruTherm Precision Dual Remote Diode Temperature Sensor with SMBus Interface
LM95231	TI	获取价格	Precision Dual Remote Diode Temperature Senso
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

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