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AD7280ABSTZ-RL Fiches technique(PDF) 2 Page - Analog Devices |
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AD7280ABSTZ-RL Fiches technique(HTML) 2 Page - Analog Devices |
2 / 48 page AD7280A Rev. 0 | Page 2 of 48 TABLE OF CONTENTS Features .............................................................................................. 1 Applications....................................................................................... 1 Functional Block Diagram .............................................................. 1 General Description ......................................................................... 1 Revision History ............................................................................... 2 Specifications..................................................................................... 3 Power Specifications .................................................................... 5 Timing Specifications .................................................................. 6 Absolute Maximum Ratings............................................................ 7 Thermal Resistance ...................................................................... 7 ESD Caution.................................................................................. 7 Pin Configuration and Function Descriptions............................. 8 Typical Performance Characteristics ........................................... 11 Terminology .................................................................................... 14 Theory of Operation ...................................................................... 15 Circuit Information.................................................................... 15 Converter Operation.................................................................. 15 Analog Input Structure.............................................................. 16 Transfer Function ....................................................................... 16 Typical Connection Diagrams.................................................. 17 Reference ..................................................................................... 19 Converting Cell Voltages and Auxiliary ADC Inputs ........... 19 Converting Cell Voltages and Auxiliary ADC Inputs in a Chain of AD7280As............................................................ 21 Conversion Window .................................................................. 22 Self-Test Conversion .................................................................. 22 Connection of Fewer Than Six Voltage Cells ............................. 22 Auxiliary ADC Inputs................................................................ 23 Power Requirements .................................................................. 23 Power-Down ............................................................................... 24 Power-Up Time........................................................................... 25 Cell Balancing Outputs.............................................................. 25 Alert Output................................................................................ 27 Register Map ................................................................................... 28 Cell Voltage Registers ................................................................ 28 Auxiliary ADC Registers ........................................................... 28 Self-Test Register ........................................................................ 28 Control Register ......................................................................... 28 Cell Overvoltage Register.......................................................... 29 Cell Undervoltage Register ....................................................... 30 AUX ADC Overvoltage Register.............................................. 30 AUX ADC Undervoltage Register ........................................... 30 Alert Register .............................................................................. 30 Cell Balance Register ................................................................. 30 CBx Timer Registers .................................................................. 30 PD Timer Register...................................................................... 31 Read Register .............................................................................. 31 CNVST Control Register........................................................... 31 Serial Interface ................................................................................ 32 Writing to the AD7280A ........................................................... 32 Reading from the AD7280A ..................................................... 33 Daisy-Chain Interface.................................................................... 34 Addressing the AD7280A While Reading Back Conversion or Register Data .......................................................................... 34 Initializing the AD7280A .......................................................... 34 Write Acknowledge.................................................................... 35 Cyclic Redundancy Check ........................................................ 35 Examples of Interfacing with the AD7280A............................... 38 Convert and Readback Routine ............................................... 38 Examples...................................................................................... 38 EMC Guidelines ............................................................................. 44 Schematic and Layout Guidelines............................................ 44 Operation in a Noisy Environment ......................................... 44 Software Flowchart .................................................................... 45 Outline Dimensions ....................................................................... 46 Ordering Guide .......................................................................... 46 Automotive Products ................................................................. 46 REVISION HISTORY 4/11—Revision 0: Initial Version |
Numéro de pièce similaire - AD7280ABSTZ-RL |
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Description similaire - AD7280ABSTZ-RL |
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