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ADT7473 Fiches technique(PDF) 2 Page - Analog Devices |
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ADT7473 Fiches technique(HTML) 2 Page - Analog Devices |
2 / 76 page ADT7473 Rev. A | Page 2 of 76 T Fe G Sp Ab Pi Ty Serial Bus Interface..................................................................... 11 Write Operations ........................................................................ 12 Read Operations ......................................................................... 13 SMBus Timeout .......................................................................... 13 nput...................................................... 13 ................... 13 VCCP Limit Registers ................................................................... 14 Additional ADC Functions for Voltage Measurements ........ 14 Temperature Measurement Method ........................................ 15 Series Resistance Cancellation.................................................. 17 Factors Affecting Diode Accuracy ........................................... 17 Additional ADC Functions for Temperature Measurement 19 Li ABLE OF CONTENTS atures .............................................................................................. 1 eneral Description ......................................................................... 1 Functional Block Diagram .............................................................. 1 ecifications..................................................................................... 4 Timing Diagram ........................................................................... 5 solute Maximum Ratings............................................................ 6 Thermal Resistance ...................................................................... 6 ESD Caution.................................................................................. 6 n Configuration and Function Descriptions............................. 7 pical Performance Characteristics ............................................. 8 Product Description....................................................................... 10 Comparison Between ADT7467 and ADT7473 .................... 10 How to Set the Functionality of Pin 9...................................... 10 Recommended Implementation............................................... 10 Voltage Measurement I Analog-to-Digital Converter .................................................... 13 Input Circuitry......................................................... Voltage Measurement Registers................................................ 13 mits, Status Registers, and Interrupts....................................... 20 Limit Values ................................................................................ 20 Interrupt Status Registers .......................................................... 21 THERM Timer ........................................................................... 23 Fan Presence Detect................................................................... 31 Sleep States .................................................................................. 31 XNOR Tree Test Mode .............................................................. 31 Power-On Default ...................................................................... 31 Pr Step 4: PWMMIN for Each PWM (Fan) Output ...................... 40 Step 5: PWMMAX for PWM (Fan) Outputs.............................. 40 Step 6: TRANGE for Temperature Channels................................ 41 ogramming the Automatic Fan Speed Control Loop ............ 33 Automatic Fan Control Overview............................................ 33 Step 1: Hardware Configuration .............................................. 34 Step 2: Configuring the Mux .................................................... 36 Step 3: T Settings for Thermal Calibration Channels MIN ...... 38 Step 7: T THERM for Temperature Channels ............................... 44 Step 8: THYST for Temperature Channels.................................. 45 Step 10: High and Low Limits for Temperature Channels ... 50 Step 11: Monitoring THERM Dynamic TMIN Control Mode ................................................... 47 Step 9: Operating Points for Temperature Channels............. 49 ................................................... 52 Enhancing System Acoustics .................................................... 53 Step 12: Ramp Rate for Acoustic Enhancement..................... 55 Register Tables ................................................................................ 58 Outline Dimensions ....................................................................... 76 Ordering Guide .......................................................................... 76 |
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