AD7787 Analog Devices, AD7787 Datasheet - Page 2

• Manufacturer Part Number: AD7787
• Description: Low Power, 2-Channel 24-Bit Sigma-Delta ADC
• Manufacturer: Analog Devices

Specifications of AD7787

• Resolution (bits): 24bit
• # Chan: 2
• Sample Rate: n/a
• Interface: Ser,SPI
• Analog Input Type: Diff-Uni,SE-Bip,SE-Uni
• Ain Range: (2Vref) p-p,(Vref) p-p,Uni (Vref)
• Adc Architecture: Sigma-Delta
• Pkg Type: SOP

AD7787
TABLE OF CONTENTS
Specifications..................................................................................... 3
Timing Characteristics..................................................................... 5
Absolute Maximum Ratings............................................................ 7
Pin Configuration and Function Descriptions............................. 8
Typical Performance Characteristics ............................................. 9
On-Chip Registers .......................................................................... 10
ADC Circuit Information.............................................................. 14
REVISION HISTORY
4/04—Revision 0: Initial Version
ESD Caution.................................................................................. 7
Communications Register (RS1, RS0 = 0, 0)........................... 10
Status Register (RS1, RS0 = 0, 0; Power-On/Reset
= 0×8C)........................................................................................ 11
Mode Register (RS1, RS0 = 0, 1; Power-On/Reset
= 0×02)......................................................................................... 12
Filter Register (RS1, RS0 = 1, 0; Power-On/Reset
= 0×04)......................................................................................... 13
Data Register (RS1, RS0 = 1, 1; Power-On/Reset
= 0×000000) ................................................................................ 13
Rev. 0 | Page 2 of 20
Circuit Description......................................................................... 18
Outline Dimensions ....................................................................... 20
Overview ..................................................................................... 14
Noise Performance ..................................................................... 14
Reduced Current Modes ........................................................... 14
Digital Interface.......................................................................... 15
Analog Input Channel ............................................................... 18
Bipolar/Unipolar Configuration .............................................. 18
Data Output Coding .................................................................. 18
Reference Input........................................................................... 18
V
Grounding and Layout .............................................................. 19
Applications ................................................................................ 19
Ordering Guide .......................................................................... 20
DD
Monitor ................................................................................ 19