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AD7124-8BCPZ-RL Arkusz danych(PDF) 3 Page - Analog Devices

Numer części AD7124-8BCPZ-RL
Szczegółowy opis  8-Channel, Low Noise, Low Power, 24-Bit Sigma-Delta ADC with PGA and Reference
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Producent  AD [Analog Devices]
Strona internetowa  http://www.analog.com
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AD7124-8BCPZ-RL Arkusz danych(HTML) 3 Page - Analog Devices

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AD7124-8
Data Sheet
Rev. D | Page 2 of 92
TABLE OF CONTENTS
Features .............................................................................................. 1
Applications....................................................................................... 1
Functional Block Diagram .............................................................. 1
Revision History ............................................................................... 3
General Description......................................................................... 4
Specifications..................................................................................... 5
Timing Characteristics .............................................................. 10
Absolute Maximum Ratings.......................................................... 13
Thermal Resistance .................................................................... 13
ESD Caution................................................................................ 13
Pin Configuration and Function Descriptions........................... 14
Terminology .................................................................................... 17
Typical Performance Characteristics ........................................... 18
RMS Noise and Resolution............................................................ 27
Full Power Mode......................................................................... 27
Mid Power Mode........................................................................ 30
Low Power Mode........................................................................ 33
Getting Started................................................................................ 36
Overview...................................................................................... 36
Power Supplies ............................................................................ 37
Digital Communication............................................................. 37
Configuration Overview ........................................................... 39
ADC Circuit Information.............................................................. 44
Analog Input Channel ............................................................... 44
External Impedance when using a Gain of 1.......................... 45
Programmable Gain Array (PGA) ........................................... 46
Reference ..................................................................................... 46
Bipolar/Unipolar Configuration .............................................. 46
Data Output Coding .................................................................. 47
Excitation Currents .................................................................... 47
Bridge Power-Down Switch ...................................................... 47
Logic Outputs.............................................................................. 47
Bias Voltage Generator .............................................................. 48
Clock ............................................................................................ 48
Power Modes............................................................................... 48
Standby and Power-Down Modes............................................ 48
Digital Interface .......................................................................... 49
DATA_STATUS.......................................................................... 51
Serial Interface Reset (DOUT_RDY_DEL and CS_EN Bits)51
Reset ............................................................................................. 51
Calibration................................................................................... 51
Span and Offset Limits .............................................................. 52
System Synchronization ............................................................ 53
Digital Filter .................................................................................... 54
Sinc4 Filter ................................................................................... 54
Sinc3 Filter ................................................................................... 56
Fast Settling Mode (Sinc4 + Sinc1 Filter).................................. 58
Fast Settling Mode (Sinc3 + Sinc1 Filter).................................. 60
Post Filters ................................................................................... 62
Summary of Filter Options ....................................................... 65
Diagnostics...................................................................................... 66
Signal Chain Check.................................................................... 66
Reference Detect......................................................................... 66
Calibration, Conversion, and Saturation Errors .................... 66
Overvoltage/Undervoltage Detection ..................................... 66
Power Supply Monitors ............................................................. 67
LDO Monitoring ........................................................................ 67
MCLK Counter........................................................................... 67
SPI SCLK Counter...................................................................... 67
SPI Read/Write Errors ............................................................... 68
SPI_IGNORE Error ................................................................... 68
Checksum Protection ................................................................ 68
Memory Map Checksum Protection ....................................... 68
ROM Checksum Protection...................................................... 69
Burnout Currents ....................................................................... 70
Temperature Sensor ................................................................... 70
Grounding and Layout .................................................................. 71
Applications Information .............................................................. 72
Temperature Measurement Using a Thermocouple.............. 72
Temperature Measurement Using an RTD............................. 73
Flowmeter.................................................................................... 75
On-Chip Registers.......................................................................... 77
Communications Register......................................................... 78
Status Register............................................................................. 78
ADC_CONTROL Register ....................................................... 79
Data Register............................................................................... 81
IO_CONTROL_1 Register........................................................ 81
IO_CONTROL_2 Register........................................................ 83
ID Register................................................................................... 84
Error Register.............................................................................. 84


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