參數(shù)資料
型號(hào)： ADT7462ACPZ-500RL7
廠商： ON SEMICONDUCTOR
元件分類： 溫度/濕度傳感器
英文描述： DIGITAL TEMP SENSOR-SERIAL, 8BIT(s), 4Cel, SQUARE, SURFACE MOUNT
封裝： 5 X 5 MM, LFCSP-32
文件頁數(shù)： 12/88頁
文件大?。?/td> 836K
代理商： ADT7462ACPZ-500RL7
ADT7462
Rev. 2 | Page 2 of 88 | www.onsemi.com
TABLE OF CONTENTS
Features...............................................................................................1
Applications .......................................................................................1
General Description..........................................................................1
Functional Block Diagram...............................................................1
Revision History................................................................................2
Specifications .....................................................................................3
Timing Diagram............................................................................4
Absolute Maximum Ratings ............................................................5
Thermal Resistance.......................................................................5
ESD Caution ..................................................................................5
Pin Configuration and Function Descriptions .............................6
Function Description: Easy Configuration Options ................9
Typical Performance Characteristics............................................14
Serial Bus Interface .........................................................................17
ADD Input ...................................................................................17
SMBus Fixed Address.................................................................17
SMBus Operation........................................................................17
Write Operations.........................................................................19
Read Operations..........................................................................20
Alert Response Address .............................................................21
SMBus Timeout...........................................................................21
Temperature and Voltage Measurement ......................................22
Temperature Measurement........................................................22
Series Resistance Cancellation ..................................................23
Voltage Measurement .................................................................25
Battery Measurement Input (VBATT) .........................................26
ADC Information .......................................................................27
Dynamic VID Functionality..........................................................29
VID Code.....................................................................................29
Dynamic VID Monitoring.........................................................29
Status and Mask Registers and ALERT ........................................30
Status Registers............................................................................30
ALERT Output ............................................................................30
Mask Registers.............................................................................30
Fan Control ......................................................................................31
Fan Drive Using PWM Control ................................................31
Fan Speed Measurement and Control..........................................33
TACH Inputs ...............................................................................33
Fan Speed Measurement ............................................................33
PWM Logic State ........................................................................36
Fan Speed Control ......................................................................36
Programming the Automatic Fan Speed Control Loop ........37
Step 1—Configuring the MUX .................................................38
Step 2—TMIN Settings for Thermal Calibration Channels .....38
Step 3—PWMMIN for Each PWM (Fan) Output .....................40
Step 4—PWMMAX for PWM (Fan) Outputs ............................40
Step 5—TRANGE for Temperature Channels ..............................41
Step 6—T
THERM for Temperature Channels.............................. 44
Step 7—THYST for Temperature Channels ................................45
Step 8—Operating Points for Temperature Channels ...........47
Step 9—High and Low Limits for Temperature Channels ....47
Step 10—Monitoring THERM..................................................50
Enhancing System Acoustics.....................................................50
Step 11—Ramp Rate for Acoustic Enhancement ...................52
Fan Freewheeling Test Mode.....................................................54
THERM I/O Operation..................................................................55
THERM Output ..........................................................................55
THERM Input .............................................................................55
THERM Timer............................................................................56
General-Purpose I/O Pins .............................................................57
EDO Circuitry.............................................................................57
Other Digital Inputs ...................................................................58
Reset I/O ......................................................................................58
Chassis Intrusion Input..............................................................58
Power-Up Sequence........................................................................59
XOR Tree Test..................................................................................60
Register Map ....................................................................................61
Outline Dimensions........................................................................88
Ordering Guide ...........................................................................88
REVISION HISTORY
12/07- Rev 2: Conversion to ON Semiconductor
10/07—Rev. 0 to Rev. A
Changes to Table 4 ............................................................................6
Changes to Configuration Option 3 Section...............................11
Changes to Figure 22 ......................................................................16
Changes to Figure 37 ......................................................................25
Changes to Battery Measurement Input (VBATT).........................27
Changes to Fan Speed Measurement Section .............................34
Changes to Table 26 ........................................................................36
1/06—Revision 0: Initial Version
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