Datasheet > ADT7421ARZ-REEL7

ADT7421ARZ-REEL7

更新时间： 2024-01-13 05:43:53

品牌	Logo	应用领域
安森美 - ONSEMI		传感器温度传感器
页数	文件大小	规格书
20页	246K
描述
Precision Temperature Sensor with Beta Compensation (for <45 nm Geometries)

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ADT7421ARZ-REEL7 数据手册

ADT7421

Precision Temperature

Sensor with Beta

Compensation

(for <45 nm Geometries)

http://onsemi.com

The ADT7421 is a dual−channel digital thermometer and

under/overtemperature alarm, intended for use in PCs and thermal

management systems. It is pin− and register−compatible with the

ADM1032, ADT7461 and ADT7461A.

MARKING

DIAGRAMS

The ADT7421 includes Beta Cancellation Technology. This enables

accurate measurement of temperature from very small geometry

(45 nm) processes. Significant variations in the Beta factor can be

observed when different currents are applied to transistors embedded

in small geometry CPU’s. This leads to large temperature errors. The

ADT7421 automatically cancels the effects of error induced by beta

variations.

T7421

ALYWRG

SOIC−8

CASE 751

= Assembly Location

= Wafer Lot

= Year

= Work Week

= SMBus Address

= Pb−Free Package

Features

• On−Chip and Remote Temperature Sensor

• 0.25°C Resolution on Remote Channel

• 1°C Resolution on Local Channel

• Automatically Cancels the Effect of Beta Variation in Thermal

Transistors on Small Geometry CPU’s

L7x

AYWG

MSOP−8

CASE 846AB

L7x = Refer to Ordering Table

= Assembly Location

= Year

= Work Week

• Automatically Cancels Up to 50 W (Typical) of Resistance in Series

with Remote Transistor

• Extended, Switchable Temperature Measurement Range

= Pb−Free Package

0°C to +125°C (default) or −40°C to +125°C

(Note: Microdot may be in either location)

• Pin− and Register−Compatible with ADM1032, ADT7461,

ADT7461A, EMC1402, and aSC7525

PIN ASSIGNMENT

• 2−Wire SMBus Serial Interface with SMBus Alert Support

• Programmable Over/Undertemperature Limits

• Offset Registers for System Calibration

• Up to Two Overtemperature Fail−Safe THERM Outputs

• Small 8−lead MSOP and SOP Packages

• These are Pb−Free Devices

SCLK

D+

D–

SDATA

ALERT/THERM2

GND

THERM

(Top View)

Applications

• Desktop and Notebook Computers

• Industrial Controllers

• Smart Batteries

ORDERING INFORMATION

See detailed ordering and shipping information in the package

dimensions section on page 18 of this data sheet.

• Automotive

• Embedded Systems

• Burn−In Applications

• Instrumentation

Publication Order Number:

January, 2010 − Rev. 5

ADT7421/D

12 3 4 5 6 7...20

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