ADT7421集成電路（IC）的傳感器檢測器接口規(guī)格書PDF中文資料

ADT7421屬于集成電路（IC）的傳感器檢測器接口。由安森美半導體公司制造生產(chǎn)的ADT7421傳感器和檢測器接口該系列產(chǎn)品可執(zhí)行信號調節(jié)、數(shù)據(jù)轉換、激勵生成和/或各種將傳感器或變送器機構連接到主機設備所需的其他功能。示例包括用于 CCD 圖像傳感器的控制器、用于 4-20 mA 接口和類似應用的電流變送器、超聲變送器前端、惠斯通電橋接口等。

Precision Temperature Sensor with Beta Compensation (for

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. 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.

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

?Automatically Cancels Up to 50 (Typical) of Resistance in Series with Remote Transistor

?Extended, Switchable Temperature Measurement Range 0°C to +125°C (default) or ?40°C to +125°C

?Pin?and Register?Compatible with ADM1032, ADT7461, ADT7461A, EMC1402, and aSC7525

?2?Wire SMBus Serial Interface with SMBus Alert Support

?Programmable Over/Undertemperature Limits

?Offset Registers for System Calibration

?Up to Two Overtemperature Fail?Safe THERMOutputs

?Small 8?lead MSOP and SOP Packages

?These are Pb?Free Devices

Applications

?Desktop and Notebook Computers

?Industrial Controllers

?Smart Batteries

?Automotive