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AD7760 数据表(PDF) 3 Page - Analog Devices

部件名 AD7760
功能描述  Sigma-Delta ADC with On-Chip Buffer
Download  37 Pages
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制造商  AD [Analog Devices]
网页  http://www.analog.com
标志 AD - Analog Devices

AD7760 数据表(HTML) 3 Page - Analog Devices

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AD7760
Rev. A | Page 2 of 36
TABLE OF CONTENTS
Features .............................................................................................. 1
Applications....................................................................................... 1
Functional Block Diagram .............................................................. 1
General Description ......................................................................... 1
Revision History ............................................................................... 3
Specifications..................................................................................... 4
Timing Specifications .................................................................. 6
Timing Diagrams.......................................................................... 7
Absolute Maximum Ratings............................................................ 8
ESD Caution.................................................................................. 8
Pin Configuration and Function Descriptions............................. 9
Terminology .................................................................................... 11
Typical Performance Characteristics ........................................... 12
Theory of Operation ...................................................................... 18
Modulator Data Output Mode...................................................... 19
Modulator Inputs........................................................................ 19
Modulator Data Output Scaling ............................................... 19
Modulator Data Output Mode Interface ..................................... 20
Clock Divide-by-1 Mode (CDIV = 1) ..................................... 20
Clock Divide-by-2 Mode (CDIV = 0) ..................................... 20
Using the AD7760 in Modulator Output Mode..................... 21
AD7760 Interface............................................................................ 22
Reading Data............................................................................... 22
Reading Status and Other Registers......................................... 22
Sharing the Parallel Bus............................................................. 22
Synchronization.......................................................................... 22
Writing to the AD7760 .............................................................. 23
Clocking the AD7760 .................................................................... 24
Buffering the MCLK signal....................................................... 24
MCLK Jitter Requirements ....................................................... 24
Driving the AD7760....................................................................... 26
Using the AD7760...................................................................... 27
Decoupling and Layout Recommendations................................ 28
Supply Decoupling ..................................................................... 29
Additional Decoupling .............................................................. 29
Reference Voltage Filtering ....................................................... 29
Differential Amplifier Components ........................................ 29
Bias Resistor Selection ............................................................... 29
Layout Considerations............................................................... 29
Exposed Paddle........................................................................... 29
Programmable FIR Filter............................................................... 30
Downloading a User-Defined Filter ............................................ 31
Example Filter Download ......................................................... 31
AD7760 Registers ........................................................................... 33
Control Register 1—Address 0x0001 ...................................... 33
Control Register 2—Address 0x0002 ...................................... 33
Status Register (Read Only) ...................................................... 34
Offset Register—Address 0x0003............................................. 34
Gain Register—Address 0x0004............................................... 34
Overrange Register—Address 0x0005..................................... 34
Outline Dimensions....................................................................... 35
Ordering Guide .......................................................................... 35


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