AD7688 Analog Devices, AD7688 Datasheet - Page 2

• Manufacturer Part Number: AD7688
• Manufacturer: Analog Devices

Specifications of AD7688

• Resolution (bits): 16bit
• # Chan: 1
• Sample Rate: 500kSPS
• Interface: Ser,SPI
• Analog Input Type: Diff-Uni
• Ain Range: (2Vref) p-p
• Adc Architecture: SAR
• Pkg Type: CSP,SOP

AD7688
TABLE OF CONTENTS
Features .............................................................................................. 1
Applications....................................................................................... 1
Application Diagram........................................................................ 1
General Description ......................................................................... 1
Revision History ............................................................................... 2
Specifications..................................................................................... 3
Timing Specifications....................................................................... 5
Absolute Maximum Ratings............................................................ 6
Pin Configuration and Function Descriptions............................. 7
Terminology ...................................................................................... 8
Typical Performance Characteristics ............................................. 9
REVISION HISTORY
2/11—Rev. 0 to Rev. A
Deleted QFN in Development Note............................ Throughout
Changes to Table 5............................................................................ 6
Added Thermal Resistance Section and Table 6 .......................... 6
Changes to Figure 6 and Table 7..................................................... 7
Updated Outline Dimensions ....................................................... 24
Changes to Ordering Guide .......................................................... 25
4/05—Revision 0: Initial Version
Thermal Resistance ...................................................................... 6
ESD Caution.................................................................................. 6
Circuit Information.................................................................... 12
Converter Operation.................................................................. 12
Typical Connection Diagram ................................................... 13
Analog Input ............................................................................... 14
Rev. A | Page 2 of 28
Application Hints ........................................................................... 23
Outline Dimensions ....................................................................... 24
Driver Amplifier Choice ........................................................... 15
Single-to-Differential Driver .................................................... 15
Voltage Reference Input ............................................................ 15
Power Supply............................................................................... 15
Supplying the ADC from the Reference.................................. 16
Digital Interface.......................................................................... 16
CS MODE 3-Wire, No BUSY Indicator .................................. 17
CS Mode 3-Wire with BUSY Indicator ................................... 18
CS Mode 4-Wire, No BUSY Indicator..................................... 19
CS Mode 4-Wire with BUSY Indicator ................................... 20
Chain Mode, No BUSY Indicator ............................................ 21
Chain Mode with BUSY Indicator........................................... 22
Layout .......................................................................................... 23
Evaluating the AD7688’s Performance.................................... 23
Ordering Guide .......................................................................... 25