AD7799 Analog Devices, AD7799 Datasheet - Page 2

• Manufacturer Part Number: AD7799
• Description: 3-Channel, Low Noise, Low Power, 24-Bit, Sigma Delta ADC with On-Chip In-Amp
• Manufacturer: Analog Devices

Specifications of AD7799

• Resolution (bits): 24bit
• # Chan: 3
• Sample Rate: n/a
• Interface: Ser,SPI
• Analog Input Type: Diff-Uni
• Ain Range: (2Vref/PGA Gain) p-p
• Adc Architecture: Sigma-Delta
• Pkg Type: SOP

AD7798/AD7799
TABLE OF CONTENTS
Features .............................................................................................. 1
Interface ............................................................................................. 1
Applications....................................................................................... 1
Functional Block Diagram .............................................................. 1
General Description ......................................................................... 1
Revision History ............................................................................... 2
Specifications..................................................................................... 3
Timing Characteristics..................................................................... 6
Absolute Maximum Ratings............................................................ 8
Pin Configuration and Function Descriptions............................. 9
Output Noise and Resolution Specifications .............................. 10
Typical Performance Characteristics ........................................... 12
On-Chip Registers .......................................................................... 13
REVISION HISTORY
3/07—Rev. 0 to Rev. A
Updated Format..................................................................Universal
Changes to Specifications ................................................................ 3
Changes to Table 5 and Table 6..................................................... 10
Changes to Table 7 and Table 8..................................................... 11
Changes to Table 14........................................................................ 15
Changes to Ordering Guide .......................................................... 27
1/05—Revision 0: Initial Version
ESD Caution.................................................................................. 8
AD7798 ........................................................................................ 10
AD7799 ........................................................................................ 11
Communication Register .......................................................... 13
Status Register ............................................................................. 14
Mode Register ............................................................................. 14
Configuration Register .............................................................. 16
Data Register ............................................................................... 17
ID Register................................................................................... 17
Rev. A | Page 2 of 28
ADC Circuit Information.............................................................. 18
Circuit Description......................................................................... 22
Applications Information .............................................................. 26
Outline Dimensions ....................................................................... 27
IO Register................................................................................... 17
Offset Register ............................................................................ 17
Full-Scale Register...................................................................... 17
Overview ..................................................................................... 18
Digital Interface.......................................................................... 19
Analog Input Channel ............................................................... 22
Instrumentation Amplifier........................................................ 22
Bipolar/Unipolar Configuration .............................................. 22
Data Output Coding .................................................................. 23
Burnout Currents ....................................................................... 23
Reference ..................................................................................... 23
Reference Detect......................................................................... 23
Reset ............................................................................................. 23
AV
Calibration................................................................................... 24
Grounding and Layout .............................................................. 25
Weigh Scales................................................................................ 26
Ordering Guide .......................................................................... 27
DD
Monitor ............................................................................. 24