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AD6684 bảng dữ liệu(PDF) 2 Page - Analog Devices

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AD6684 bảng dữ liệu(HTML) 2 Page - Analog Devices

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AD6684
Data Sheet
Rev. 0 | Page 2 of 107
TABLE OF CONTENTS
Features .............................................................................................. 1
 
Applications....................................................................................... 1
 
Functional Block Diagram .............................................................. 1
 
Revision History ............................................................................... 3
 
General Description ......................................................................... 4
 
Product Highlights ........................................................................... 4
 
Specifications..................................................................................... 5
 
DC Specifications ......................................................................... 5
 
AC Specifications.......................................................................... 6
 
Digital Specifications ................................................................... 8
 
Switching Specifications .............................................................. 9
 
Timing Specifications .................................................................. 9
 
Absolute Maximum Ratings.......................................................... 11
 
Thermal Characteristics ............................................................ 11
 
ESD Caution................................................................................ 11
 
Pin Configuration and Function Descriptions........................... 12
 
Typical Performance Characteristics ........................................... 14
 
Equivalent Circuits ......................................................................... 21
 
Theory of Operation ...................................................................... 23
 
ADC Architecture ...................................................................... 23
 
Analog Input Considerations.................................................... 23
 
Voltage Reference ....................................................................... 25
 
Clock Input Considerations ...................................................... 26
 
Temperature Diode .................................................................... 27
 
ADC Overrange and Fast Detect.................................................. 28
 
ADC Overrange.......................................................................... 28
 
Fast Threshold Detection (FD_A, FD_B, FD_C and FD_D).... 28
 
Signal Monitor ................................................................................ 29
 
SPORT Over JESD204B............................................................. 29
 
Digital Downconverter (DDC)..................................................... 32
 
DDC I/Q Input Selection .......................................................... 32
 
DDC I/Q Output Selection ....................................................... 32
 
DDC General Description ........................................................ 32
 
Frequency Translation ................................................................... 38
 
General Description................................................................... 38
 
DDC NCO + Mixer Loss and SFDR........................................ 39
 
Numerically Controlled Oscillator........................................... 39
 
FIR Filters ........................................................................................ 41
 
General Description................................................................... 41
 
Half-Band Filters ........................................................................ 42
 
DDC Gain Stage ......................................................................... 44
 
DDC Complex to Real Conversion ......................................... 44
 
DDC Example Configurations ................................................. 45
 
Noise Shaping Requantizer (NSR) ............................................... 49
 
Decimating Half-Band Filter .................................................... 49
 
NSR Overview ............................................................................ 50
 
Variable Dynamic Range (VDR) .................................................. 51
 
VDR Real Mode.......................................................................... 52
 
VDR Complex Mode ................................................................. 52
 
Digital Outputs ............................................................................... 54
 
Introduction to the JESD204B Interface ................................. 54
 
JESD204B Overview .................................................................. 54
 
Functional Overview ................................................................. 56
 
JESD204B Link Establishment ................................................. 56
 
Physical Layer (Driver) Outputs .............................................. 57
 
JESD204B Tx Converter Mapping ........................................... 59
 
Setting Up the AD6684 Digital Interface ................................ 60
 
Latency............................................................................................. 64
 
End-To-End Total Latency........................................................ 64
 
Multichip Synchronization............................................................ 65
 
SYSREF± Setup/Hold Window Monitor................................. 67
 
Test Modes....................................................................................... 69
 
ADC Test Modes ........................................................................ 69
 
JESD204B Block Test Modes .................................................... 70
 
Serial Port Interface........................................................................ 72
 
Configuration Using the SPI..................................................... 72
 
Hardware Interface..................................................................... 72
 
SPI Accessible Features.............................................................. 72
 
Memory Map .................................................................................. 73
 
Reading the Memory Map Register Table............................... 73
 
Memory Map .................................................................................. 74
 
Memory Map Summary ............................................................ 74
 
Memory Map Details ................................................................. 82
 
Applications Information ............................................................ 106
 
Power Supply Recommendations........................................... 106
 
Exposed Pad Thermal Heat Slug Recommendations.......... 106
 
AVDD1_SR (Pin 64) and AGND_SR (Pin 63 and Pin 67). 106
 
Outline Dimensions ..................................................................... 107
 
Ordering Guide ........................................................................ 107
 


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