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AS1543 Datasheet(PDF) 2 Page - ams AG |
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AS1543 Datasheet(HTML) 2 Page - ams AG |
2 / 29 page www.austriamicrosystems.com Revision 1.00 2 - 29 AS1543/44 Data Sheet 1 General Description ................................................................................................................................ 1 2 Key Features .......................................................................................................................................... 1 3 Applications ............................................................................................................................................ 1 4 Pinout ..................................................................................................................................................... 3 Pin Assignments ..................................................................................................................................................... 3 Pin Descriptions ..................................................................................................................................................... 3 5 Absolute Maximum Ratings .................................................................................................................... 4 6 Electrical Characteristics ........................................................................................................................ 5 Timing Specifications .............................................................................................................................................. 8 7 Typical Operating Characteristics ........................................................................................................... 9 8 Detailed Description ............................................................................................................................. 12 Converter Operation ............................................................................................................................................. 12 Analog Input ......................................................................................................................................................... 13 Track/Hold ..................................................................................................................................................... 13 Control Register ................................................................................................................................................... 14 Analog Input Configuration ............................................................................................................................ 15 Input Channel Selection ................................................................................................................................ 15 Transfer Functions ........................................................................................................................................ 16 Two’s Complement Transfer Function ........................................................................................................... 16 Power Mode Selection .................................................................................................................................. 17 Sequencer Operation .................................................................................................................................... 17 Shadow Register .................................................................................................................................................. 18 Direct Conversion (SEQ = 0, SHADOW = 0) ................................................................................................ 18 Shadow Register Conversion (SEQ = 0, SHADOW = 1) .............................................................................. 19 Channel Counter Conversion (SEQ = 1, SHADOW = 1) ............................................................................... 20 Serial Interface ..................................................................................................................................................... 20 Power Modes ....................................................................................................................................................... 22 Normal Mode (PM1 = 1, PM0 = 1) ................................................................................................................ 22 Auto Shutdown (PM1 = 0, PM0 = X) ............................................................................................................. 23 Power vs. Throughput Rate .................................................................................................................................. 23 VDRIVE ................................................................................................................................................................ 24 External Reference ............................................................................................................................................... 24 9 Application Information ......................................................................................................................... 25 Initialisation ........................................................................................................................................................... 25 Grounding and Layout Considerations ................................................................................................................. 26 10 Package Drawings and Markings ....................................................................................................... 27 11 Ordering Information 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