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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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AD7770 датащи(PDF) 3 Page - Analog Devices |
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AD7770 датащи(HTML) 3 Page - Analog Devices |
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3 / 98 page  AD7770 Data Sheet Rev. C | Page 2 of 97 TABLE OF CONTENTS Features .............................................................................................. 1 Applications....................................................................................... 1 General Description ......................................................................... 1 Revision History ............................................................................... 4 Functional Block Diagram .............................................................. 5 Specifications..................................................................................... 6 DOUTx Timing Characterististics........................................... 10 SPI Timing Characterististics ................................................... 11 Synchronization Pins and Reset Timing Characteristics...... 12 SAR ADC Timing Characterististics ....................................... 13 GPIO SRC Update Timing Characterististics......................... 13 Absolute Maximum Ratings.......................................................... 14 Thermal Resistance .................................................................... 14 ESD Caution................................................................................ 14 Pin Configuration and Function Descriptions........................... 15 Typical Performance Characteristics ........................................... 18 Terminology .................................................................................... 31 Theory of Operation ...................................................................... 33 Analog Inputs.............................................................................. 33 Transfer Function ....................................................................... 34 Core Signal Chain....................................................................... 35 Capacitive PGA........................................................................... 35 Internal Reference and Reference Buffers............................... 35 Integrated LDOs ......................................................................... 36 Clocking and Sampling.............................................................. 36 Digital Reset and Synchronization Pins .................................. 36 Digital Filtering........................................................................... 37 Shutdown Mode.......................................................................... 37 Controlling the AD7770 ............................................................ 38 Pin Control Mode....................................................................... 38 SPI Control.................................................................................. 40 Digital SPI.................................................................................... 43 RMS Noise and Resolution............................................................ 46 High Resolution Mode............................................................... 46 Low Power Mode........................................................................ 46 Diagnostics and Monitoring ......................................................... 47 Self Diagnostics Error ................................................................ 47 Monitoring Using the AD7770 SAR ADC (SPI Control Mode)........................................................................................... 48 Σ-Δ ADC Diagnostics (SPI Control Mode)............................ 50 Σ-∆ Output Data............................................................................. 51 ADC Conversion Output—Header and Data ........................ 51 SRC (SPI Control Mode)........................................................... 52 Data Output Interface................................................................ 53 Calculating the CRC Checksum .............................................. 58 Register Summary .......................................................................... 60 Register Details ............................................................................... 64 Channel 0 Configuration Register ........................................... 64 Channel 1 Configuration Register ........................................... 64 Channel 2 Configuration Register ........................................... 65 Channel 3 Configuration Register ........................................... 65 Channel 4 Configuration Register ........................................... 66 Channel 5 Configuration Register ........................................... 66 Channel 6 Configuration Register ........................................... 67 Channel 7 Configuration Register ........................................... 67 Disable Clocks to ADC Channel Register .............................. 68 Channel 0 Sync Offset Register ................................................ 68 Channel 1 Sync Offset Register ................................................ 68 Channel 2 Sync Offset Register ................................................ 68 Channel 3 Sync Offset Register ................................................ 69 Channel 4 Sync Offset Register ................................................ 69 Channel 5 Sync Offset Register ................................................ 69 Channel 6 Sync Offset Register ................................................ 69 Channel 7 Sync Offset Register ................................................ 69 General User Configuration 1 Register................................... 70 General User Configuration 2 Register................................... 70 General User Configuration 3 Register................................... 71 Data Output Format Register ................................................... 72 Main ADC Meter and Reference Mux Control Register ...... 73 Global Diagnostics Mux Register............................................. 74 GPIO Configuration Register................................................... 74 GPIO Data Register.................................................................... 75 Buffer Configuration 1 Register............................................... 75 Buffer Configuration 2 Register............................................... 75 Channel 0 Offset Upper Byte Register..................................... 76 Channel 0 Offset Middle Byte Register................................... 76 Channel 0 Offset Lower Byte Register..................................... 76 Channel 0 Gain Upper Byte Register....................................... 76 Channel 0 Gain Middle Byte Register ..................................... 76 Channel 0 Gain Lower Byte Register....................................... 77 |
Аналогичный номер детали - AD7770_17 |
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Аналогичное описание - AD7770_17 |
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