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AD9912ABCPZ Scheda tecnica(PDF) 2 Page - Analog Devices |
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AD9912ABCPZ Scheda tecnica(HTML) 2 Page - Analog Devices |
2 / 40 page AD9912 Rev. F | Page 2 of 40 TABLE OF CONTENTS Features .............................................................................................. 1 Applications....................................................................................... 1 General Description ......................................................................... 1 Basic Block Diagram ........................................................................ 1 Revision History ............................................................................... 3 Specifications..................................................................................... 4 DC Specifications ......................................................................... 4 AC Specifications.......................................................................... 6 Absolute Maximum Ratings............................................................ 8 Thermal Resistance ...................................................................... 8 ESD Caution.................................................................................. 8 Pin Configuration and Function Descriptions............................. 9 Typical Performance Characteristics ........................................... 11 Input/Output Termination Recommendations .......................... 16 Theory of Operation ...................................................................... 17 Overview...................................................................................... 17 Direct Digital Synthesizer (DDS)............................................. 17 Digital-to-Analog (DAC) Output ............................................ 18 Reconstruction Filter ................................................................. 18 FDBK_IN Inputs ........................................................................ 19 SYSCLK Inputs ........................................................................... 20 Output Clock Drivers and 2× Frequency Multiplier ............. 22 Harmonic Spur Reduction ........................................................ 22 Thermal Performance .................................................................... 24 Power-Up ......................................................................................... 25 Power-On Reset .......................................................................... 25 Default Output Frequency on Power-Up................................ 25 Power Supply Partitioning............................................................. 26 3.3 V Supplies.............................................................................. 26 1.8 V Supplies.............................................................................. 26 Serial Control Port ......................................................................... 27 Serial Control Port Pin Descriptions....................................... 27 Operation of Serial Control Port.............................................. 27 The Instruction Word (16 Bits) ................................................ 28 MSB/LSB First Transfers ........................................................... 28 I/O Register Map ............................................................................ 31 I/O Register Descriptions.............................................................. 33 Serial Port Configuration (Register 0x0000 to Register 0x0005) ......................................................................... 33 Power-Down and Reset (Register 0x0010 to Register 0x0013) ......................................................................... 33 System Clock (Register 0x0020 to Register 0x0022) ............. 34 CMOS Output Divider (S-Divider) (Register 0x0100 to Register 0x0106) ......................................................................... 35 Frequency Tuning Word (Register 0x01A0 to Register 0x01AD) ....................................................................... 35 Doubler and Output Drivers (Register 0x0200 to Register 0x0201) ......................................................................... 37 Calibration (User-Accessible Trim) (Register 0x0400 to Register 0x0410) ......................................................................... 37 Harmonic Spur Reduction (Register 0x0500 to Register 0x0509) ......................................................................... 37 Outline Dimensions ....................................................................... 39 Ordering Guide .......................................................................... 39 |
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