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AD7734 数据表(PDF) 3 Page - Analog Devices

部件名 AD7734
功能描述  4-Channel 10 V Input Range, High Throughput, 24-Bit Sigma-Delta ADC
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制造商  AD [Analog Devices]
网页  http://www.analog.com
标志 AD - Analog Devices

AD7734 数据表(HTML) 3 Page - Analog Devices

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AD7734
Data Sheet
Rev. B | Page 2 of 32
TABLE OF CONTENTS
Features .............................................................................................. 1
Applications....................................................................................... 1
Functional Block Diagram .............................................................. 1
General Description ......................................................................... 1
Revision History ............................................................................... 2
Specifications..................................................................................... 3
Timing Specifications .................................................................. 6
Absolute Maximum Ratings............................................................ 8
ESD Caution.................................................................................. 8
Typical Performance Characteristics ............................................. 9
Output Noise and Resolution Specification................................ 10
Chopping Enabled...................................................................... 10
Chopping Disabled..................................................................... 11
Pin Configuration and Function Descriptions........................... 12
Register Description....................................................................... 14
Register Access............................................................................ 15
Communications Register......................................................... 15
I/O Port Register......................................................................... 16
Revision Register ........................................................................ 16
Test Register ................................................................................ 16
ADC Status Register................................................................... 16
Checksum Register..................................................................... 17
ADC Zero-Scale Calibration Register ..................................... 17
ADC Full-Scale Register............................................................ 17
Channel Data Registers.............................................................. 17
Channel Zero-Scale Calibration Registers .............................. 18
Channel Full-Scale Calibration Registers................................ 18
Channel Status Registers ........................................................... 18
Channel Setup Registers............................................................ 19
Channel Conversion Time Registers ....................................... 19
Mode Register ............................................................................. 20
Digital Interface Description ........................................................ 22
Hardware ..................................................................................... 22
Reset ............................................................................................. 23
Access the AD7734 Registers.................................................... 23
Single Conversion and Reading Data ...................................... 23
Dump Mode................................................................................ 24
Continuous Conversion Mode ................................................. 24
Continuous Read (Continuous Conversion) Mode ............. 25
Circuit Description......................................................................... 26
Analog Front End....................................................................... 26
Analog Input’s Extended Voltage Range ................................. 27
Chopping ..................................................................................... 27
Multiplexer, Conversion, and Data Output Timing .............. 28
Σ-Δ ADC ..................................................................................... 28
Frequency Response .................................................................. 29
Voltage Reference Inputs........................................................... 29
Reference Detect......................................................................... 29
I/O Port........................................................................................ 30
Calibration................................................................................... 30
ADC Zero-Scale Self-Calibration ............................................ 30
Per Channel System Calibration .............................................. 30
Outline Dimensions ....................................................................... 32
Ordering Guide .......................................................................... 32
REVISION HISTORY
9/15—Rev. A to Rev. B
Change to Figure 14 ....................................................................... 22
Changes to Figure 28...................................................................... 29
Changes to Ordering Guide .......................................................... 32
7/12—Rev. 0 to Rev. A
Changes to ADC Performance Chop Enabled Parameter .......... 3
Changes to Figure 22...................................................................... 25
2/03—Revision 0: Initial Version


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