參數(shù)資料
型號(hào)： LM95245CIMM-1
廠商： NATIONAL SEMICONDUCTOR CORP
元件分類(lèi)： 溫度/濕度傳感器
英文描述： Precision Remote Diode Digital Temperature Sensor with TruTherm⑩ BJT Beta Compensation Technology for 45nm Process
中文描述： DIGITAL TEMP SENSOR-SERIAL, 11BIT(s), 3Cel, SQUARE, SURFACE MOUNT
封裝： MO-187, MSOP-8
文件頁(yè)數(shù)： 1/24頁(yè)
文件大小： 342K
代理商： LM95245CIMM-1
October 2007
LM95245
Precision Remote Diode Digital Temperature Sensor with
TruTherm BJT Beta Compensation Technology for 45nm
Process
General Description
The LM95245 is an 11-bit digital temperature sensor with a
2-wire System Management Bus (SMBus) interface and
TruTherm technology that can monitor the temperature of a
remote diode as well as its own temperature. The LM95245
can be used to very accurately monitor the temperature of
external devices such as microprocessors. TruTherm tech-
nology allows the LM95245 to precisely monitor thermal
diodes found in 90 nm and smaller geometry processes. The
LM95245 is specifically targeted for Intel processors on 45nm
process. LM95245 reports temperature in two different for-
mats for +127.875°C/-128°C range and 0°C/255°C range.
The LM95245 T_CRIT and OS outputs are asserted when
either unmasked channel exceeds its programmed limit and
can be used to shutdown the system, to turn on the system
fans, or as a microcontroller interrupt function. The current
status of the T_CRIT and OS pins can be read back from the
status registers via the SMBus interface. All limits have a
shared programmable hysteresis register.
The remote temperature channel of the LM95245 has a pro-
grammable digital filter. The LM95245 is targeted for a typical
Intel processor on a 45 nm, 65 nm or 90nm process, and
has an offset register for maximum flexibility and best accu-
racy.
The LM95245 has a three-level address pin to connect up to
3 devices to the same SMBus master, that is shared with the
OS output. The LM95245 has a programmable conversion
rate register and a standby mode to save power. One con-
version can be triggered in standby mode by writing to the
one-shot register.
Features
■
Remote and Local temperature channels
■
Targeted for Intel 45nm processor diodes
■
Two Formats: 128°C to +127.875°C and
0°C to 255.875°C
■
Digital filter for remote channel
■
Programmable TCRIT and OS thresholds
■
Programmable shared hysteresis register
■
Diode Fault Detection
■
Mask, Offset, and Status Registers
■
SMBus 2.0 compatible interface, supports TIMEOUT
■
Programmable conversion rate for best power
consumption
■
Three-level address pin
■
Standby mode one-shot conversion control
■
Pin-for-pin compatible with the LM95235 and LM86/LM89/
LM99
■
8-pin MSOP package
Key Specifications
■
Supply Voltage
■
Supply Current, Conv. Rate = 1 Hz
■
Remote Diode Temperature Accuracy
T
A
= 25°C to 85°C; T
D
= 50°C to 105°C
T
A
= 25°C to 85°C; T
D
= 40°C to 125°C
■
Local Temperature Accuracy
T
A
= 25°C to 100°C
■
Conversion Rate, Both Channels
3.0 V to 3.6 V
350 μA (typ)
±0.75°C (max)
±1.5°C (max)
±2.0°C (max)
16 to 0.4 Hz
Applications
■
Processor/Computer System Thermal Management
(e.g. Laptops, Desktops, Workstations, Servers)
■
Electronic Test Equipment
■
Office Electronics
Connection Diagram
MSOP-8
30015102
TOP VIEW
TruTherm is a trademark of National Semiconductor Corporation.
Intel is a registered trademark of Intel Corporation.
Pentium is a registered trademark of Intel Corporation.
2007 National Semiconductor Corporation
300151
www.national.com
L
C
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
LM95245CIMM-1/NOPB 功能描述:板上安裝溫度傳感器 RoHS:否 制造商:Omron Electronics 輸出類(lèi)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
LM95245CIMMX 功能描述:板上安裝溫度傳感器 RoHS:否 制造商:Omron Electronics 輸出類(lèi)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
LM95245CIMMX/NOPB 功能描述:板上安裝溫度傳感器 RoHS:否 制造商:Omron Electronics 輸出類(lèi)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
LM95245CIMMX-1 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Precision Remote Diode Digital Temperature Sensor with TruTherm㈢ BJT Beta Compensation Technology for 45nm Process
LM95245CIMMX-1/NOPB 功能描述:板上安裝溫度傳感器 RoHS:否 制造商:Omron Electronics 輸出類(lèi)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
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