ADM1033ARQ-REEL7 Просмотр технического описания (PDF) - Analog Devices
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ADM1033ARQ-REEL7 Datasheet PDF : 40 Pages
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ADM1033
TABLE OF CONTENTS
General Description ......................................................................... 3
Specifications..................................................................................... 4
Absolute Maximum Ratings............................................................ 6
Thermal Characteristics .............................................................. 6
ESD Caution.................................................................................. 6
Pin Configuration and Function Descriptions............................. 7
Typical Performance Characteristics ............................................. 8
Functional Description .................................................................. 10
Internal Registers........................................................................ 10
Serial Bus Interface..................................................................... 10
LOCATION Input ...................................................................... 10
SMBus 2.0 ARP-Capable Mode ................................................ 10
SMBus 2.0 Fixed-and-Discoverable Mode.............................. 12
SMBus 2.0 Read and Write Operations ................................... 12
Register Addresses for Single/Block Byte Modes ................... 14
Write Operations ........................................................................ 14
Read Operations ......................................................................... 15
SMBus Timeout .......................................................................... 15
Packet Error Checking (PEC) ................................................... 15
Alert Response Address (ARA) ................................................ 15
Temperature Measurement System.............................................. 16
Internal Temperature Measurement ........................................ 16
Remote Temperature Measurement......................................... 16
Additional Functions ................................................................. 18
Layout Considerations ................................................................... 19
Limits, Status Registers, and Interrupts ....................................... 20
8-Bit Limits.................................................................................. 20
Out-of-Limit Comparisons ....................................................... 20
Analog Monitoring Cycle Time................................................ 20
Status Registers ........................................................................... 20
ALERT Interrupt Behavior........................................................ 21
Handling SMBusALERT Interrupts......................................... 22
Interrupt Masking Register ....................................................... 22
FAN_FAULT Output ................................................................. 23
Fault Queue ................................................................................. 23
Conversion Rate Register .......................................................... 23
THERM I/O Timer and Limits ................................................ 23
THERM % Limit Register ......................................................... 24
Fan Drive Signal ......................................................................... 25
Synchronous Speed Control ..................................................... 25
Fan Inputs.................................................................................... 26
Fan Speed Measurement ........................................................... 26
Fan Speed Measurement Registers........................................... 27
Reading Fan Speed ..................................................................... 27
Calculating Fan Speed ............................................................... 27
Alarm Speed................................................................................ 27
Look-Up Table: Modes of Operation....................................... 28
Look-Up Table ............................................................................ 28
Setting Up the Look-Up Table in Linear Mode...................... 29
Selecting which Temperature Channel Controls a Fan......... 29
Look-Up Table Hysteresis ......................................................... 29
Programming the THERM Limit for Temperature Channels
....................................................................................................... 30
XOR Tree Test Mode.................................................................. 30
Lock Bit........................................................................................ 30
SW Reset...................................................................................... 30
Outline Dimensions ....................................................................... 39
Ordering Guide .......................................................................... 39
REVISION HISTORY
8/04—Revision 0: Initial Version
Rev. 0 | Page 2 of 40
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