AD7195 Analog Devices, AD7195 Datasheet - Page 2

• Manufacturer Part Number: AD7195
• Description: 4.8 kHz, Ultralow Noise, 24-Bit Sigma-Delta ADC with PGA and AC Excitation
• Manufacturer: Analog Devices

Specifications of AD7195

• Resolution (bits): 24bit
• # Chan: 4
• Sample Rate: n/a
• Interface: Ser,SPI
• Analog Input Type: Diff-Bip,Diff-Uni,SE-Bip,SE-Uni
• Ain Range: (2Vref/PGA Gain) p-p
• Adc Architecture: Sigma-Delta
• Pkg Type: CSP

AD7195
TABLE OF CONTENTS
Features .............................................................................................. 1
Interface ............................................................................................. 1
Applications ....................................................................................... 1
General Description ......................................................................... 1
Functional Block Diagram .............................................................. 1
Revision History ............................................................................... 2
Specifications ..................................................................................... 3
Absolute Maximum Ratings ............................................................ 8
Pin Configuration and Function Descriptions ............................. 9
Typical Performance Characteristics ........................................... 11
RMS Noise and Resolution ............................................................ 13
On-Chip Registers .......................................................................... 17
ADC Circuit Information .............................................................. 25
REVISION HISTORY
1/10—Revision 0: Initial Version
Timing Characteristics ................................................................ 6
Thermal Resistance ...................................................................... 8
ESD Caution .................................................................................. 8
Sinc
Sinc
Sinc
Sinc
Communications Register ......................................................... 18
Status Register ............................................................................. 19
Mode Register ............................................................................. 19
Configuration Register .............................................................. 21
Data Register ............................................................................... 23
ID Register ................................................................................... 23
GPOCON Register ..................................................................... 23
Offset Register ............................................................................. 24
Full-Scale Register ...................................................................... 24
4
3
4
3
Chop Disabled ................................................................... 13
Chop Disabled ................................................................... 14
Chop Enabled .................................................................... 15
Chop Enabled .................................................................... 16
Rev. 0 | Page 2 of 44
Applications Information .............................................................. 43
Outline Dimensions ....................................................................... 44
Overview ..................................................................................... 25
Analog Input Channel ............................................................... 26
PGA .............................................................................................. 26
Reference ..................................................................................... 26
Reference Detect ......................................................................... 26
Bipolar/Unipolar Configuration .............................................. 27
Data Output Coding .................................................................. 27
Burnout Currents ....................................................................... 27
AC Excitation .............................................................................. 27
Channel Sequencer .................................................................... 28
Digital Interface .......................................................................... 28
Reset ............................................................................................. 32
System Synchronization ............................................................ 32
Clock ............................................................................................ 32
Enable Parity ............................................................................... 32
Temperature Sensor ................................................................... 32
Bridge Power-Down Switch ...................................................... 33
Calibration ................................................................................... 33
Digital Filter ................................................................................ 34
Sinc
Sinc
Chop Enabled (Sinc
Chop Enabled (Sinc
Summary of Filter Options ....................................................... 41
Grounding and Layout .............................................................. 42
Weigh Scales ................................................................................ 43
Ordering Guide .......................................................................... 44
4
3
Filter (Chop Disabled) ..................................................... 34
Filter (Chop Disabled) ..................................................... 36
4
3
Filter) ...................................................... 38
Filter) ...................................................... 40