LM95245

更新时间： 2024-11-05 03:51:39

品牌	Logo	应用领域
美国国家半导体 - NSC		二极管传感器温度传感器测试
页数	文件大小	规格书
24页	521K
描述
Precision Remote Diode Digital Temperature Sensor with TruTherm⑩ BJT Beta Compensation Technology for 45nm Process

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LM95245 数据手册

October 2007

LM95245

Precision Remote Diode Digital Temperature Sensor with

TruTherm™ BJT Beta Compensation Technology for 45nm

Process

Digital filter for remote channel

■

General Description

Programmable TCRIT and OS thresholds

The LM95245 is an 11-bit digital temperature sensor with a

Programmable shared hysteresis register

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.

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

3.0 V to 3.6 V

350 µA (typ)

■ꢀ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

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.

±0.75°C (max)

±1.5°C (max)

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.

±2.0°C (max)

16 to 0.4 Hz

■ꢀConversion Rate, Both Channels

Applications

Processor/Computer System Thermal Management

(e.g. Laptops, Desktops, Workstations, Servers)

■

Features

Remote and Local temperature channels

Electronic Test Equipment

Office Electronics

■

Targeted for Intel 45nm processor diodes

Two Formats: −128°C to +127.875°C and

0°C to 255.875°C

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.

300151

www.national.com

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与LM95245相关器件

型号	品牌	获取价格	描述	数据表
LM95245_08	NSC	获取价格	Precision Remote Diode Digital Temperature Se
LM95245CIM	NSC	获取价格	Precision Remote Diode Digital Temperature Se
LM95245CIM/NOPB	TI	获取价格	具有 SMBus 接口、采用 β 补偿技术、适用于 45nm 处理器二极管的 ±0.75°
LM95245CIMM	NSC	获取价格	Precision Remote Diode Digital Temperature Se
LM95245CIMM	TI	获取价格	具有 SMBus 接口、采用 β 补偿技术、适用于 45nm 处理器二极管的 ±0.75°
LM95245CIMM/NOPB	NSC	获取价格	Switch/Digital Output Temperature Sensor, DIGITAL TEMP SENSOR-SERIAL, 11BIT(s), 3Cel, SQUA
LM95245CIMM/NOPB	TI	获取价格	具有 SMBus 接口、采用 β 补偿技术、适用于 45nm 处理器二极管的 ±0.75°
LM95245CIMM-1	NSC	获取价格	Precision Remote Diode Digital Temperature Se
LM95245CIMM-1/NOPB	TI	获取价格	具有 SMBus 接口、采用 β 补偿技术、适用于 45nm 处理器二极管的 ±0.75°
LM95245CIMMX	NSC	获取价格	Precision Remote Diode Digital Temperature Se

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