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參數(shù)資料
| 型號： | LM95221CIMM |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 溫度/濕度傳感器 |
| 英文描述： | Dual Remote Diode Digital Temperature Sensor with SMBus 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(shù)： | 1/16頁 |
| 文件大小： | 282K |
| 代理商： | LM95221CIMM |
LM95221
Dual Remote Diode Digital Temperature Sensor with
SMBus Interface
General Description
The LM95221 is a dual remote diode temperature sensor in
an 8-lead MSOP package. The 2-wire serial interface of the
LM95221 is compatible with SMBus 2.0. The LM95221 can
sense three temperature zones, it can measure the tempera-
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 127C. Local temperature read-
ings have a resolution of 9-bits plus sign.
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
±
1C is factory trimmed for a
series resistance of 2.7 ohms and 1.008 non-ideality factor.
Features
n
Accurately senses die temperature of remote ICs or
diode junctions
n
Remote diode fault detection
n
On-board local temperature sensing
n
Remote temperature readings:
— 0.125 C LSb
— 10-bits plus sign or 11-bits programmable resolution
— 11-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
n
Shutdown mode one-shot conversion control
n
SMBus 2.0 compatible interface, supports TIMEOUT
n
8-pin MSOP package
Key Specifications
j
Local Temperature Accuracy
T
A
=0C to 85C
±
3.0 C (max)
j
Remote Diode Temperature Accuracy
T
A
=30C to 50C, T
D
=45C to 85C
T
A
=0C to 85C, T
D
=25C to 140C
j
Supply Voltage
j
Supply Current
±
1.0 C (max)
±
3.0 C (max)
3.0 V to 3.6 V
2 mA (typ)
Applications
n
Processor/Computer System Thermal Management
(e.g. Laptop, Desktop, Workstations, Server)
n
Electronic Test Equipment
n
Office Electronics
Simplified Block Diagram
20094301
Pentium
is a trademark of Intel Corporation.
May 2004
L
2004 National Semiconductor Corporation
DS200943
www.national.com
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LM95221CIMM/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(zhǔn)確性:+/- 1.5 C, +/- 3 C 溫度閾值: 數(shù)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(guān)閉: 安裝風(fēng)格: 封裝 / 箱體: 設(shè)備功能:Temperature and Humidity Sensor |
| LM95221CIMMX | 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(zhǔn)確性:+/- 1.5 C, +/- 3 C 溫度閾值: 數(shù)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(guān)閉: 安裝風(fēng)格: 封裝 / 箱體: 設(shè)備功能:Temperature and Humidity Sensor |
| LM95221CIMMX/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(zhǔn)確性:+/- 1.5 C, +/- 3 C 溫度閾值: 數(shù)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(guān)閉: 安裝風(fēng)格: 封裝 / 箱體: 設(shè)備功能:Temperature and Humidity Sensor |
| LM95221EVAL | 功能描述:溫度傳感器開發(fā)工具 LM95221 EVAL BOARD RoHS:否 制造商:Texas Instruments 產(chǎn)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: |
| LM95231 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:TruTherm Precision Dual Remote Diode Temperature Sensor with SMBus Interface |
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