AD7687 Analog Devices, AD7687 Datasheet - Page 2

• Manufacturer Part Number: AD7687
• Manufacturer: Analog Devices

Specifications of AD7687

• Resolution (bits): 16bit
• # Chan: 1
• Sample Rate: 250kSPS
• Interface: Ser,SPI
• Analog Input Type: Diff-Uni
• Ain Range: (2Vref) p-p
• Adc Architecture: SAR
• Pkg Type: CSP,SOP

AD7687
TABLE OF CONTENTS
Features .............................................................................................. 1
Applications....................................................................................... 1
Application Diagram........................................................................ 1
General Description ......................................................................... 1
Revision History ............................................................................... 2
Specifications..................................................................................... 3
Timing Specifications....................................................................... 5
Absolute Maximum Ratings............................................................ 7
Pin Configurations and Function Descriptions ........................... 8
Terminology ...................................................................................... 9
Typical Performance Characteristics ........................................... 10
REVISION HISTORY
8/11—Rev. A to Rev. B
Changes to Table 7............................................................................ 7
Changes to Ordering Guide .......................................................... 26
2/11—Rev. 0 to Rev. A
Deleted QFN in Development Note............................ Throughout
Changes to Table 6............................................................................ 7
Added Thermal Resistance Section and Table 7 .......................... 7
Changes to Figure 6 and Table 8..................................................... 8
Updated Outline Dimensions ....................................................... 25
Changes to Ordering Guide .......................................................... 26
4/05—Revision 0: Initial Version
Thermal Resistance ...................................................................... 7
ESD Caution.................................................................................. 7
Circuit Information.................................................................... 13
Converter Operation.................................................................. 13
Typical Connection Diagram ................................................... 14
Analog Input ............................................................................... 15
Rev. B | Page 2 of 28
Application Hints ........................................................................... 24
Outline Dimensions ....................................................................... 25
Driver Amplifier Choice ........................................................... 16
Single-to-Differential Driver .................................................... 16
Voltage Reference Input ............................................................ 16
Power Supply............................................................................... 16
Supplying the ADC from the Reference.................................. 17
Digital Interface.......................................................................... 17
CS MODE 3-Wire, No BUSY Indicator .................................. 18
CS Mode 3-Wire with BUSY Indicator ................................... 19
CS Mode 4-Wire, No BUSY Indicator..................................... 20
CS Mode 4-Wire with BUSY Indicator ................................... 21
Chain Mode, No BUSY Indicator ............................................ 22
Chain Mode with BUSY Indicator........................................... 23
Layout .......................................................................................... 24
Evaluating the AD7687’s Performance.................................... 24
Ordering Guide .......................................................................... 26
Data Sheet