LM89-1CIMMX Datasheet

IC型號：
LM89-1CIMMX
PDF描述：
【0.75∑C Accurate, Remote Diode and Local Digital Temperatu...
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740.80KB
PDF頁數(shù)：
20頁
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NSC

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LM89

鹵

0.75藲C Accurate, Remote Diode and Local Digital Temperature Sensor with Two-Wire

Interface

December 2004

LM89

鹵

0.75藲C Accurate, Remote Diode and Local Digital

Temperature Sensor with Two-Wire Interface

General Description

The LM89 is an 11-bit digital temperature sensor with a

2-wire System Management Bus (SMBus) serial interface.

The LM89 accurately measures its own temperature as well

as the temperature of an external device, such as processor

thermal diode or diode-connected transistor such as the

2N3904. The temperature of any ASIC can be accurately

determined using the LM89 as long as a dedicated diode

(semiconductor junction) is available on the target die. The

LM89 remote sensor accuracy of

鹵

0.75藲C is factory trimmed

for the series resistance and 1.0021 typical non-ideality fac-

tor of the Intel

廬

Pentium

鈩?/div>

4 and the Mobile Pentium 4

Processor-M thermal diode. The LM89 has an Offset

requiring continuous software management. Contact

hardware.monitor.team

nsc.com to obtain the latest data for

new processors.

The LM89 and the LM89-1 have the same functions but

different SMBus slave addresses. This allows for one of

each to be on the bus at the same time.

Activation of the ALERT output occurs when any tempera-

ture goes outside a preprogrammed window set by the HIGH

and LOW temperature limit registers or exceeds the T_CRIT

temperature limit. Activation of the T_CRIT_A occurs when

any temperature exceeds the T_CRIT programmed limit.

The LM89 is pin and register compatible with the LM86,

LM90, Analog Devices ADM1032 and Maxim MAX6657/8.

Offset register allows sensing a variety of thermal

diodes accurately

On-board local temperature sensing

10 bit plus sign remote diode temperature data format,

0.125 藲C resolution

T_CRIT_A output useful for system shutdown

ALERT output supports SMBus 2.0 protocol

SMBus 2.0 compatible interface, supports TIMEOUT

8-pin MSOP and SOIC packages

Key Specifications

Supply Voltage

Supply Current

3.0 V to 3.6 V

0.8 mA (typ)

=25藲C to 125藲C

Local Temp Accuracy (includes quantization error)

鹵

3.0 藲C (max)

Remote Diode Temp Accuracy (includes quantization

error)

鹵

0.75 藲C (max)

鹵

1.0 藲C (max)

=30藲C to 50藲C, T

=60藲C to 100藲C

鹵

3.0 藲C (max)

=0藲C to 85藲C, T

=25藲C to 125藲C

=30藲C,T

=80藲C

Applications

Processor/Computer System Thermal Management

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

Electronic Test Equipment

Office Electronics

Features

Accurately senses die temperature of remote ICs or

diode junctions

Simplified Block Diagram

20041501

Pentium

鈩?/div>

is a trademark of Intel Corporation.

漏 2004 National Semiconductor Corporation

DS200415

www.national.com

標(biāo)準(zhǔn)包裝
3,500
類別
集成電路 (IC)
家庭
PMIC - 熱管理
系列
-
功能
溫度監(jiān)控系統(tǒng)（傳感器）
傳感器類型
內(nèi)部和外部
感應(yīng)溫度
0°C ~ 125°C
精確度
±1°C 本地（最大），±3°C 遠(yuǎn)程（最大）
拓?fù)?/label>
ADC（三角積分型），比較器，寄存器庫
輸出類型
SMBus?
輸出警報
是
輸出風(fēng)扇
是
電源電壓
3 V ~ 3.6 V
工作溫度
0°C ~ 125°C
安裝類型
表面貼裝
封裝/外殼
8-TSSOP，8-MSOP（0.118"，3.00mm 寬）
供應(yīng)商設(shè)備封裝
8-MSOP
包裝
帶卷 (TR)
其它名稱
LM89-1CIMMXTR

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LM89-1CIMMX Datasheet

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