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參數資料
| 型號： | LM90 |
| 廠商： | National Semiconductor Corporation |
| 元件分類： | 溫度/濕度傳感器 |
| 英文描述： | 3 Degree Celcious Accurate, Remote Diode and Local Digital Temperature Sensor with Two-Wire Interface |
| 中文描述： | 3度Celcious精確，遠程二極管和本地數字溫度傳感器兩線接口 |
| 文件頁數： | 1/20頁 |
| 文件大小： | 384K |
| 代理商： | LM90 |
LM90
±
3C Accurate, Remote Diode and Local Digital
Temperature Sensor with Two-Wire Interface
General Description
The LM90 is an 11-bit digital temperature sensor with a
2-wire System Management Bus (SMBus) serial interface.
The LM90 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 LM90 as long as a dedicated diode
(semiconductor junction) is available on the target die. The
LM90 remote sensor accuracy of
±
3C is factory trimmed for
the 1.008 typical non-ideality factor of the mobile Pentium
III
thermal
diode.
The
LM90
has
an
register
to
allow
measuring
other
diodes
requiring
continuous
software
management.
hardware.monitor.team
@
nsc.com to obtain the latest data for
new processors.
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 LM90 is pin and register compatible with the LM86,
Analog Devices ADM1032 and Maxim MAX6657/8.
Offset
without
Contact
Features
n
Accurately senses die temperature of remote ICs or
diode junctions
n
Offset register allows sensing a variety of thermal
diodes accurately
n
On-board local temperature sensing
n
10 bit plus sign remote diode temperature data format,
0.125 C resolution
n
Diode fault detection circuitry
n
T_CRIT_A output useful for system shutdown (open
diode does not activate T_CRIT_A)
n
ALERT output supports SMBus 2.0 protocol
n
SMBus 2.0 compatible interface, supports TIMEOUT
n
8-pin MSOP packages
Key Specifications
j
Supply Voltage
j
Supply Current
j
Local Temp Accuracy (includes quantization error)
T
A
=25C to 125C
j
Remote Diode Temp Accuracy (includes quantization
error)
T
A
=30C to 50C, T
D
=60C to 100C
T
A
=0C to 85C, T
D
=25C to 125C
3.0V to 3.6V
0.8mA (typ)
±
4.0C (max)
±
3.0C (max)
±
4.0C (max)
Applications
n
System Thermal Management
(e.g. Laptop, Desktop, Workstations, Server)
n
Electronic Test Equipment
n
Office Electronics
LM90 Simplified Block Diagram
20033701
Pentium
is a trademark of Intel Corporation.
February 2002
L
3
I
2002 National Semiconductor Corporation
DS200337
www.national.com
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|---|---|
| LM9011 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Electronic Ignition Interface |
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| LM9011MX | 功能描述:IC INTERFACE ELECT IGNITN 28SOIC RoHS:是 類別:集成電路 (IC) >> PMIC - 電源管理 - 專用 系列:- 應用說明:Ultrasound Imaging Systems Application Note 產品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:37 系列:- 應用:醫療用超聲波成像，聲納 電流 - 電源:- 電源電壓:2.37 V ~ 6 V 工作溫度:0°C ~ 70°C 安裝類型:表面貼裝 封裝/外殼:56-WFQFN 裸露焊盤 供應商設備封裝:56-TQFN-EP（8x8） 包裝:管件 |
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