ADT7490

更新时间： 2024-01-21 06:39:32

品牌	Logo	应用领域
亚德诺 - ADI		风扇监控控制器
页数	文件大小	规格书
76页	1623K
描述
dBCool Remote Thermal Monitor and Fan Controller with PECI Interface

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技术参数
数据手册

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ADT7490 技术参数

是否Rohs认证：	符合	生命周期：	Transferred
零件包装代码：	SSOP	包装说明：	SSOP, SSOP24,.24
针数：	24	Reach Compliance Code：	unknown
ECCN代码：	EAR99	HTS代码：	8542.39.00.01
风险等级：	5.04	Is Samacsys：	N
模拟集成电路 - 其他类型：	ANALOG CIRCUIT	JESD-30 代码：	R-PDSO-G24
JESD-609代码：	e3	长度：	8.6614 mm
功能数量：	1	端子数量：	24
最高工作温度：	125 °C	最低工作温度：	-40 °C
封装主体材料：	PLASTIC/EPOXY	封装代码：	SSOP
封装等效代码：	SSOP24,.24	封装形状：	RECTANGULAR
封装形式：	SMALL OUTLINE, SHRINK PITCH	峰值回流温度（摄氏度）：	NOT SPECIFIED
电源：	3.3 V	认证状态：	Not Qualified
座面最大高度：	1.7526 mm	子类别：	Motion Control Electronics
最大供电电流 (Isup)：	5 mA	最大供电电压 (Vsup)：	3.6 V
最小供电电压 (Vsup)：	3 V	标称供电电压 (Vsup)：	3.3 V
表面贴装：	YES	温度等级：	AUTOMOTIVE
端子形式：	GULL WING	端子节距：	0.635 mm
端子位置：	DUAL	处于峰值回流温度下的最长时间：	NOT SPECIFIED
宽度：	3.9116 mm	Base Number Matches：	1

ADT7490 数据手册

ADT7490

TABLE OF CONTENTS

Features...............................................................................................1

Limits, Status Registers, and Interrupts .......................................25

Limit Values.................................................................................25

Interrupt Status Registers...........................................................26

Applications .......................................................................................1

General Description..........................................................................1

Functional Block Diagram...............................................................2

Revision History................................................................................3

Specifications .....................................................................................4

Absolute Maximum Ratings ............................................................6

Thermal Characteristics...............................................................6

ESD Caution ..................................................................................6

Pin Configuration and Function Descriptions .............................7

Typical Performance Characteristics..............................................9

Theory of Operation.......................................................................12

THERM

Timer............................................................................28

Fan Drive Using PWM Control ................................................30

Laying Out 3-Wire Fans.............................................................32

Programming T_range.....................................................................35

Programming the Automatic Fan Speed Control loop..............36

Manual Fan Control Overview .................................................36

Operation in Manual Mode.......................................36

THERM

Automatic Fan Control Overview ............................................36

Step 1: Hardware Configuration ...............................................37

Step 2: Configuring the Muxtiplexer........................................37

Step 3: T_MINSettings for Thermal Calibration Channels .......38

Step 4: PWM_MINfor Each PWM (Fan) Output .......................40

Step 5: PWM_MAXfor PWM (Fan) Outputs...............................40

Step 6: T_RANGEfor Temperature Channels ................................41

Step 7: T_THERMfor Temperature Channels ................................43

Feature Comparisons Between the ADT7490 and ADT7476A

.......................................................................................................12

Start-Up Operation.....................................................................13

Serial Bus Interface .....................................................................13

Write Operations.........................................................................14

Read Operations..........................................................................15

SMBus Timeout...........................................................................16

Voltage Measurement Input.......................................................16

Additional ADC Functions for Voltage Measurements.........17

Temperature Measurement........................................................19

Thermal Diode Temperature Measurement Method.............21

Series Resistance Cancellation ..................................................22

Factors Affecting Diode Accuracy............................................22

Additional ADC Functions for Temperature Measurement.23

Step 8: T_HYSTfor Temperature Channels...................................44

Programming the GPIOs...........................................................46

XNOR Tree Test Mode...............................................................46

Outline Dimensions........................................................................76

Ordering Guide ...........................................................................76

REVISION HISTORY

7/07—Revision 0: Initial Version

Rev. 0 | Page 3 of 76

1 234 5 6 7...76

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