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AD7707 Datasheet(PDF) 2 Page - Analog Devices |
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AD7707 Datasheet(HTML) 2 Page - Analog Devices |
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2 / 52 page  AD7707 Rev. B | Page 2 of 52 TABLE OF CONTENTS Features .............................................................................................. 1 General Description ......................................................................... 1 Functional Block Diagram .............................................................. 1 Product Highlights ........................................................................... 1 Revision History ............................................................................... 3 Specifications..................................................................................... 4 Timing Characteristics ................................................................ 8 Absolute Maximum Ratings............................................................ 9 ESD Caution.................................................................................. 9 Pin Configuration and Function Descriptions........................... 10 Typical Performance Characteristics ........................................... 12 O tput Noise ......................................................................... ......... 14 Output Noise For Low Level Input Channels (5 V Operation) .......................................................................... 14 Output Noise For Low Level Input Channels (3 V Operation) .......................................................................... 15 Output Noise For High Level Input Channel AIN3 (5 V Operation) .......................................................................... 16 Output Noise For High Level Input Channel AIN3 (3 V Operation) .......................................................................... 17 On-Chip Registers .......................................................................... 18 Communications Register (RS2, RS1, RS0 = 0, 0, 0) ............. 18 Calibration Sequences.................................................................... 23 Circuit Description......................................................................... 24 Analog Input ................................................................................... 25 Analog Input Ranges.................................................................. 25 Input Sample Rate ...................................................................... 26 Bipolar/Unipolar Inputs ............................................................ 26 Reference Input ............................................................................... 27 Digital Filtering............................................................................... 28 Filter Characteristics .................................................................. 28 Postfiltering ................................................................................. 29 Analog Filtering .......................................................................... 29 Calibration....................................................................................... 30 Self-Calibration........................................................................... 30 System Calibration ..................................................................... 30 Span and Offset Limits on the Low Level Input Channels, AIN1 and AIN2 .......................................................................... 31 Span and Offset Limits on the High Level Input Channel AIN3............................................................................................. 31 Power-Up and Calibration ........................................................ 32 Using the AD7707 .......................................................................... 33 Clocking and Oscillator Circuit ............................................... 33 System Synchronization ............................................................ 33 Reset Input .................................................................................. 34 Standby Mode ............................................................................. 34 Accuracy ...................................................................................... 34 Drift Considerations .................................................................. 34 Power Supplies ................................................................................ 35 Supply Current............................................................................ 35 Grounding and Layout .............................................................. 35 Digital Interface .............................................................................. 36 Configuring the AD7707............................................................... 37 Microcomputer/Microprocessor Interfacing.............................. 39 AD7707 to 68HC11 Interface .................................................. 39 AD7707 to 8XC51 Interface..................................................... 40 Code For Setting Up the AD7707 ................................................ 41 C Code for Interfacing AD7707 to 68HC11........................... 41 Applications Information .............................................................. 43 Data Acquisition......................................................................... 43 Smart Valve/Actuator Control.................................................. 43 Pressure Measurement............................................................... 45 Thermocouple Measurement ................................................... 45 RTD Measurement..................................................................... 45 Chart Recorders.......................................................................... 46 Accommodating Various High Level Input Ranges .............. 46 Typical Input Currents............................................................... 46 Output Noise For High Level Input Channel, AIN3 ................. 47 5 V Operation ............................................................................. 47 3 V Operation ............................................................................. 48 Outline Dimensions ....................................................................... 49 Ordering Guide .......................................................................... 50 |
Similar Part No. - AD7707_15 |
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Similar Description - AD7707_15 |
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