ADT7467ARQZ-R71 데이터 시트보기 (PDF) - ON Semiconductor
부품명
상세내역
제조사
ADT7467ARQZ-R71 Datasheet PDF : 77 Pages
| |||
ADT7467
TABLE OF CONTENTS
Features...............................................................................................1
General Description..........................................................................1
Functional Block Diagram...............................................................1
Revision History................................................................................2
Specifications .....................................................................................3
Absolute Maximum Ratings ............................................................5
Thermal Characteristics...............................................................5
ESD Caution ..................................................................................5
Pin Configuration and Function Descriptions .............................6
Typical Performance Characteristics..............................................7
Product Description .........................................................................9
Comparison Between ADT7460 and ADT7467.......................9
Recommended Implementation ...............................................10
Serial Bus Interface .........................................................................11
Write Operations.........................................................................13
Read Operations..........................................................................13
SMBus Timeout...........................................................................14
Analog-to-Digital Converter .........................................................15
Voltage Measurement Input ......................................................15
Additional ADC Functions for Voltage Measurements.........15
Temperature Measurement........................................................16
Series Resistance Cancellation ..................................................17
Additional ADC Functions for Temperature Measurement.19
Limits, Status Registers, and Interrupts .......................................21
Limit Values .................................................................................21
Status Registers............................................................................22
Interrupts .....................................................................................22
Active Cooling .................................................................................27
Driving the Fan Using PWM Control......................................27
Laying Out 2-Wire and 3-Wire Fans........................................29
Fan Speed Measurement ............................................................30
Fan Spin-Up.................................................................................31
PWM Logic State ........................................................................32
Fan Speed Control ......................................................................33
Miscellaneous Functions................................................................34
Operating from 3.3 V Standby..................................................34
XNOR Tree Test Mode ...............................................................34
Power-On Default .......................................................................34
Automatic Fan Control Overview ................................................35
Dynamic TMIN Control Mode ....................................................36
Programming the Automatic Fan Speed Control Loop.............38
Step 1: Hardware Configuration ...............................................38
Step 2: Configuring the Mux.....................................................40
Step 3: TMIN Settings for Thermal Calibration Channels .......42
Step 4: PWMMIN for PWM (Fan) Outputs ...............................43
Step 5: PWMMAX for PWM (Fan) Outputs ..............................44
Step 6: TRANGE for Temperature Channels ................................45
Step 7: TTHERM for Temperature Channels................................47
Step 8: THYST for Temperature Channels ..................................49
Step 9: Operating Points for Temperature Channels .............50
Step 10: High and Low Limits for Temperature Channels....51
Step 11: Monitoring THERM....................................................53
Step 12: Ramp Rate for Acoustic Enhancement .....................54
Enhancing System Acoustics .........................................................57
Acoustic Enhancement Mode Overview.................................57
Register Map ....................................................................................59
ADT7467 Programming Block Diagram.....................................76
Outline Dimensions........................................................................77
Ordering Guide ...........................................................................77
REVISION HISTORY
01/08 - Rev 3: Conversion to ON Semiconductor
12/07—Rev. A to Rev. B
Changes to Limit Values Section
Changes to Table 13
Changes to Figure 34 and Figure 36
Changes to Figure 41
Changes to Step 11: Monitoring THERM Section
Changes to Table 26
Changes to Table 30
Changes to Table 37
Changes to Table 38
Changes to Table 41 and Table 42
Changes to Table 52 and Table 53
Changes to Table 54
Changes to Figure 84
Updated Outline Dimensions
Changes to Ordering Guide
7/05—Rev. 0 to Rev. A
Change to Absolute Maximum Ratings
Change to Recommended Implementation Section
Changes to Recommended Implementation Figure
Deleted Recommended Implementation 2 Section
Deleted Recommended Implementation 2 Figure
Change to Table 17
Changes to Ordering Guide
4/04—Revision 0: Initial Version
Rev. 3 | Page 2 of 77 | www.onsemi.com
Share Link: 