AD7793 Analog Devices, AD7793 Datasheet - Page 2

• Manufacturer Part Number: AD7793
• Description: 3-Channel, Low Noise, Low Power, 24-Bit Sigma Delta ADC with On-Chip In-Amp and Reference
• Manufacturer: Analog Devices

Specifications of AD7793

• 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

AD7792/AD7793
TABLE OF CONTENTS
Features .............................................................................................. 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 .............................. 11
Typical Performance Characteristics ........................................... 13
On-Chip Registers .......................................................................... 14
REVISION HISTORY
3/07—Rev. A to Rev. B
Updated Format..................................................................Universal
Change to Functional Block Diagram ........................................... 1
Changes to Specifications Section.................................................. 3
Changes to Specifications Endnote 1............................................. 5
Changes to Table 5, Table 6, and Table 7 ..................................... 11
Changes to Table 8, Table 9, and Table 10 ................................... 12
Changes to Table 16........................................................................ 16
Changes to Overview Section ....................................................... 20
Renamed Applications Section to Applications Information... 29
Changes to Ordering Guide .......................................................... 30
Timing Diagrams.......................................................................... 7
ESD Caution.................................................................................. 8
External Reference...................................................................... 11
Internal Reference ...................................................................... 12
Communications Register......................................................... 14
Status Register ............................................................................. 15
Mode Register ............................................................................. 15
Configuration Register .............................................................. 17
Data Register ............................................................................... 18
ID Register................................................................................... 18
IO Register................................................................................... 18
Rev. B | Page 2 of 32
ADC Circuit Information.............................................................. 20
Circuit Description......................................................................... 24
Applications Information .............................................................. 28
Outline Dimensions ....................................................................... 30
4/05—Rev. 0 to Rev. A
Changes to Absolute Maximum Ratings........................................8
Changes to Figure 17.......................................................................22
Changes to Data Output Coding Section.....................................24
Changes to Calibration Section .....................................................26
Changes to Ordering Guide ...........................................................30
10/04—Revision 0: Initial Version
Offset Register ............................................................................ 19
Full-Scale Register...................................................................... 19
Overview ..................................................................................... 20
Digital Interface.......................................................................... 21
Analog Input Channel ............................................................... 24
Instrumentation Amplifier........................................................ 24
Bipolar/Unipolar Configuration .............................................. 24
Data Output Coding .................................................................. 24
Burnout Currents ....................................................................... 25
Excitation Currents .................................................................... 25
Bias Voltage Generator .............................................................. 25
Reference ..................................................................................... 25
Reset ............................................................................................. 25
AV
Calibration................................................................................... 26
Grounding and Layout .............................................................. 26
Temperature Measurement using a Thermocouple............... 28
Temperature Measurement using an RTD.............................. 29
Ordering Guide .......................................................................... 30
DD
Monitor ............................................................................. 26