AD7194 Analog Devices, AD7194 Datasheet - Page 2

• Manufacturer Part Number: AD7194
• Description: 8-Channel, 4.8 kHz, Ultralow Noise, 24-Bit Sigma-Delta ADC with PGA
• Manufacturer: Analog Devices

Specifications of AD7194

• Resolution (bits): 24bit
• # Chan: 8
• 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: CSP

AD7194
TABLE OF CONTENTS
Features .............................................................................................. 1
Applications ....................................................................................... 1
General Description ......................................................................... 1
Functional Block Diagram .............................................................. 1
Revision History ............................................................................... 2
Specifications ..................................................................................... 3
Absolute Maximum Ratings ............................................................ 9
Pin Configuration and Function Descriptions ........................... 10
Typical Performance Characteristics ........................................... 12
RMS Noise and Resolution ............................................................ 15
On-Chip Registers .......................................................................... 18
ADC Circuit Information .............................................................. 29
REVISION HISTORY
10/09—Revision 0: Initial Version
Timing Characteristics ................................................................ 7
Thermal Resistance ...................................................................... 9
ESD Caution .................................................................................. 9
Sinc
Sinc
Fast Settling ................................................................................. 17
Communications Register ......................................................... 19
Status Register ............................................................................. 20
Mode Register ............................................................................. 21
Configuration Register .............................................................. 24
Data Register ............................................................................... 27
ID Register ................................................................................... 27
GPOCON Register ..................................................................... 27
Offset Register ............................................................................. 28
Full-Scale Register ...................................................................... 28
Overview ...................................................................................... 29
Analog Input Channel ............................................................... 30
4
3
Chop Disabled ................................................................... 15
Chop Disabled ................................................................... 16
Rev. 0 | Page 2 of 56
Digital Filter .................................................................................... 39
Grounding and Layout .................................................................. 52
Applications Information .............................................................. 53
Outline Dimensions ....................................................................... 54
Programmable Gain Array (PGA) ........................................... 30
Reference ..................................................................................... 30
Reference Detect ......................................................................... 31
Bipolar/Unipolar Configuration .............................................. 31
Data Output Coding .................................................................. 31
Burnout Currents ....................................................................... 31
Digital Interface .......................................................................... 32
Reset ............................................................................................. 36
System Synchronization ............................................................ 36
Enable Parity ............................................................................... 36
Clock ............................................................................................ 36
Temperature Sensor ................................................................... 36
Logic Outputs ............................................................................. 37
Calibration ................................................................................... 37
Sinc
Sinc
Chop Enabled (Sinc
Chop Enabled (Sinc
Fast Settling Mode (Sinc
Fast Settling Mode (Sinc
Fast Settling Mode (Chop Enabled) ......................................... 50
Summary of Filter Options ....................................................... 51
Flowmeter .................................................................................... 53
Ordering Guide .......................................................................... 54
4
3
Filter (Chop Disabled) ..................................................... 39
Filter (Chop Disabled) ..................................................... 41
4
3
Filter) ...................................................... 43
Filter) ...................................................... 45
4
3
Filter) ............................................... 46
Filter) ............................................... 48