ADAS1000-1 View Datasheet(PDF) - Analog Devices
Part Name
Description
MFG CO.
ADAS1000-1 Datasheet PDF : 85 Pages
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ADAS1000/ADAS1000-1/ADAS1000-2
TABLE OF CONTENTS
Features .............................................................................................. 1
Applications....................................................................................... 1
General Description ......................................................................... 1
Revision History ............................................................................... 3
Functional Block Diagram .............................................................. 4
Specifications..................................................................................... 5
Noise Performance ..................................................................... 10
Timing Characteristics .............................................................. 11
Absolute Maximum Ratings.......................................................... 14
Thermal Resistance .................................................................... 14
ESD Caution................................................................................ 14
Pin Configurations and Function Descriptions ......................... 15
Typical Performance Characteristics ........................................... 19
Applications Information .............................................................. 26
Overview...................................................................................... 26
ECG Inputs—Electrodes/Leads................................................ 29
ECG Channel .............................................................................. 30
Electrode/Lead Formation and Input Stage Configuration.. 31
Defibrillator Protection ............................................................. 35
ESIS Filtering............................................................................... 35
ECG Path Input Multiplexing ................................................... 35
Common-Mode Selection and Averaging .............................. 36
Wilson Central Terminal (WCT) ............................................. 37
Right Leg Drive/Reference Drive ............................................. 37
Calibration DAC......................................................................... 38
Gain Calibration ......................................................................... 38
Lead-Off Detection .................................................................... 38
AC Lead-Off Detection ............................................................... 39
Shield Driver ............................................................................... 40
Respiration (ADAS1000 Model Only)..................................... 40
Evaluating Respiration Performance ....................................... 43
Extend Switch On Respiration Paths ....................................... 44
Data Sheet
Pacing Artifact Detection Function (ADAS1000 Only) ....... 45
Biventricular Pacers ................................................................... 48
Pace Detection Measurements ................................................. 48
Evaluating Pace Detection Performance ................................. 48
Pace Width .................................................................................. 48
Pace Latency................................................................................ 48
Pace Detection via Secondary Serial Interface (ADAS1000
and ADAS1000-1 Only) ............................................................ 48
Filtering........................................................................................ 49
Voltage Reference ....................................................................... 50
Gang Mode Operation............................................................... 50
Interfacing in Gang Mode ......................................................... 52
Serial Interfaces............................................................................... 54
Standard Serial Interface ........................................................... 54
SPI Interface Resync .................................................................. 56
Secondary Serial Interface......................................................... 58
RESET .......................................................................................... 58
PD Function ................................................................................ 58
SPI Output Frame Structure (ECG and Status Data) ................ 59
SPI Register Definitions and Memory Map................................ 60
Control Registers Details............................................................... 61
Examples of Interfacing to the ADAS1000 ............................. 79
Software Flowchart .................................................................... 82
Power Supply, Grounding, and Decoupling Strategy ............ 83
AVDD .......................................................................................... 83
ADCVDD and DVDD Supplies............................................... 83
Unused Pins/Paths ..................................................................... 83
Layout Recommendations ........................................................ 83
Outline Dimensions ....................................................................... 84
Ordering Guide .......................................................................... 85
Rev. C | Page 2 of 85
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