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AD7715 Datasheet(PDF) 3 Page - Analog Devices

Part # AD7715
Description  16-Bit, Sigma-Delta ADC
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Manufacturer  AD [Analog Devices]
Direct Link  http://www.analog.com
Logo AD - Analog Devices

AD7715 Datasheet(HTML) 3 Page - Analog Devices

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AD7715
Data Sheet
Rev. E | Page 2 of 40
TABLE OF CONTENTS
Features .............................................................................................. 1
Functional Block Diagram .............................................................. 1
General Description ......................................................................... 1
Product Highlights ........................................................................... 1
Revision History ............................................................................... 2
Specifications..................................................................................... 3
AD7715-5 ...................................................................................... 3
AD7715-3 ...................................................................................... 5
Timing Characteristics ................................................................ 8
Absolute Maximum Ratings............................................................ 9
ESD Caution.................................................................................. 9
Pin Configuration And Function Descriptions.......................... 10
Terminology .................................................................................... 11
On-Chip Registers .......................................................................... 12
Communications Register (RS1, RS0 = 0, 0) .......................... 13
Setup Register (RS1, RS0 = 0, 1); Power On/Reset Status:
28 Hex .......................................................................................... 14
Test Register (RS1, RS0 = 1, 0).................................................. 15
Data Register (RS1, RS0 = 1, 1) ................................................ 15
Output Noise ................................................................................... 16
AD7715-5 .................................................................................... 16
AD7715-3 .................................................................................... 17
Calibration Sequences.................................................................... 18
Circuit Description......................................................................... 19
Analog Input ............................................................................... 19
Reference Input........................................................................... 21
Digital Filtering........................................................................... 21
Analog Filtering.......................................................................... 23
Calibration................................................................................... 23
Using the AD7715 .......................................................................... 26
Clocking and Oscillator Circuit ............................................... 26
System Synchronization ............................................................ 26
Reset Input .................................................................................. 27
Standby Mode ............................................................................. 27
Accuracy ...................................................................................... 27
Drift Considerations .................................................................. 27
Power Supplies ............................................................................ 28
Digital Interface.......................................................................... 29
Configuring the AD7715............................................................... 31
Microcontroller/Microprocessor Interfacing ............................. 32
AD7715 to 68HC11 Interface ................................................... 32
AD7715 to 8XC51 Interface...................................................... 33
AD7715 to ADSP-2184N/ADSP-2185N/ADSP-2186N/
ADSP-2187N/ADSP-2188N/ADSP-2189N Interface............ 33
Code For Setting Up The AD7715............................................... 34
C Code for Interfacing AD7715 to 68HC11........................... 34
Applications Information .............................................................. 36
Pressure Measurement............................................................... 36
Temperature Measurement ....................................................... 37
Smart Transmitters..................................................................... 38
Outline Dimensions ....................................................................... 39
Ordering Guide .......................................................................... 40
REVISION HISTORY
6/15—Rev. D to Rev. E
Changes to Table 10........................................................................ 13
Changed ADSP-2103/ADSP-2105 to ADSP-2184N/ADSP-2185N/
ADSP-2186N/ADSP-2187N/ADSP-2188N/ADSP-2189N ....... 33
Updated Outline Dimensions ....................................................... 39
Changes to Ordering Guide .......................................................... 40
12/09—Rev. C to Rev. D
Updated Format..................................................................Universal
Changes to Table 5............................................................................ 9
Updated Outline Dimensions ....................................................... 39
2/00—Rev. B to Rev. C


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