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參數資料
| 型號： | LM99-1CIMMX |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 溫度/濕度傳感器 |
| 英文描述： | 【1C Accurate, High Temperature, Remote Diode Temperature Sensor with Two-Wire Interface |
| 中文描述： | DIGITAL TEMP SENSOR-SERIAL, 11BIT(s), 3Cel, SQUARE, SURFACE MOUNT |
| 封裝： | MO-187, MSOP-8 |
| 文件頁數： | 1/20頁 |
| 文件大小： | 349K |
| 代理商： | LM99-1CIMMX |
LM99
±1C Accurate, High Temperature, Remote Diode
Temperature Sensor with Two-Wire Interface
General Description
The LM99 is an 11-bit remote diode temperature sensor with
a 2-wire System Management Bus (SMBus) serial interface.
The LM99 accurately measures: (1) its own temperature and
(2) the temperature of a remote diode-connected transistor
such as the 2N3904 or a thermal diode commonly found on
Graphics Processor Units (GPU), Computer Processor Units
(CPU or other ASICs. The LM99 remote diode temperature
sensor shifts the temperature from the remote sensor down
16C and operates on that shifted temperature:
T
ACTUAL DIODE JUNCTION =TLM99 + 16C
The local temperature reading requires no offset.
The LM99 has an Offset Register which provides a means
for precise matching to various thermal diodes. Contact
hardware.monitor@nsc.com for the latest details.
The LM99 and LM99-1 have the same functions but different
SMBus slave addresses. This allows for one of each to be on
the same 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.
Features
n
Accurately senses the temperature of remote diodes
n
Offset register allows use of a variety of thermal diodes
n
On-board local temperature sensing
n
10 bit plus sign remote diode temperature data format,
0.125 C resolution
n
T_CRIT_A output useful for system shutdown
n
ALERT output supports SMBus 2.0 protocol
n
SMBus 2.0 compatible interface, supports TIMEOUT
n
8-pin MSOP package
Key Specifications
j Supply Voltage
3.0 V to 3.6 V
j Supply Current
0.8 mA (typ)
j Local Temp Accuracy (includes quantization error)
T
A = 25C to 125C
±3.0C (max)
j Remote Diode Temp Accuracy (includes quantization
error)
T
A= 30C to 50C, TD= 120C to 140C
±1.0C (max)
T
A= 0C to 85C, TD= 25C to 140C
±3.0C (max)
Applications
n
Graphics Processor Thermal Management
n
Computer Processor Thermal Management
n
Electronic Test Equipment
n
Office Electronics
Simplified Block Diagram
20053801
NVIDIA is a registered trademark of NVIDIA Corporation.
GeForce is a trademark of NVIDIA Corporation.
Intel and Pentium are registered trademarks of Intel Corporation.
July 2003
LM99
±
1C
Accurate,
High
T
emperature,
Remote
Diode
T
emperature
Sensor
with
T
wo-W
ire
Interface
2003 National Semiconductor Corporation
DS200538
www.national.com
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相關代理商/技術參數 |
參數描述 |
|---|---|
| LM99-1CIMMX/NOPB | 功能描述:板上安裝溫度傳感器 RoHS:否 制造商:Omron Electronics 輸出類型:Digital 配置: 準確性:+/- 1.5 C, +/- 3 C 溫度閾值: 數字輸出 - 總線接口:2-Wire, I2C, SMBus 電源電壓-最大:5.5 V 電源電壓-最小:4.5 V 最大工作溫度:+ 50 C 最小工作溫度:0 C 關閉: 安裝風格: 封裝 / 箱體: 設備功能:Temperature and Humidity Sensor |
| LM99-1EVAL | 功能描述:BOARD EVALUATION LM99-1 RoHS:否 類別:編程器，開發系統 >> 評估板 - 傳感器 系列:PowerWise® 產品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:1 系列:- |
| LM99-1EVAL/NOPB | 功能描述:溫度傳感器開發工具 LM99-1 EVAL BOARD RoHS:否 制造商:Texas Instruments 產品類型:Temperature Sensors and Control ICs 工具用于評估:MSP430G2553 接口類型:USB 工作電源電壓: 工作電源電流: |
| LM994-HH | 功能描述:基本/快動開關 Foot Switch RoHS:否 制造商:Omron Electronics 觸點形式:SPDT 執行器:Lever 電流額定值:5 A 電壓額定值 AC:250 V 電壓額定值 DC:30 V 功率額定值: 工作力:120 g IP 等級:IP 67 NEMA 額定值: 端接類型:Wire 安裝:Panel |
| LM994-JJ | 功能描述:基本/快動開關 Foot Switch RoHS:否 制造商:Omron Electronics 觸點形式:SPDT 執行器:Lever 電流額定值:5 A 電壓額定值 AC:250 V 電壓額定值 DC:30 V 功率額定值: 工作力:120 g IP 等級:IP 67 NEMA 額定值: 端接類型:Wire 安裝:Panel |
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