Datasheet ADAS1000, ADAS1000-1, ADAS1000-2 (Analog Devices) - 10

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ADAS1000/ ADAS1000-1/ ADAS1000-2 Data Sheet NOISE PERFORMANCE Table 3. Typical Input Referred Noise over 0.5 Second Window (µV p-p)1 GAIN 0 (×1.4) GAIN 1 (×2.1) GAIN 2 (×2.8) GAIN 3 (×4.2) Mode Data Rate2 ±1 VCM ±0.67 VCM ±0.5 VCM ±0.3 VCM
Analog Lead Mode3 High Performance Mode 2 kHz (0.5 Hz to 40 Hz) 8 6 5 4 2 kHz (0.05 Hz to 150 Hz) 14 11 9 7.5 1 Typical values measured at 25°C, not subject to production test. 2 Data gathered using the 2 kHz packet/frame rate is measured over 0.5 seconds. The ADAS1000 internal programmable low-pass filter is configured for either 40 Hz or 150 Hz bandwidth. The data is gathered and post processed using a digital filter of either 0.05 Hz or 0.5 Hz to provide data over noted frequency bands. 3 Analog lead mode as shown in Figure 58.
Table 4. Typical Input Referred Noise (μV p-p)1 GAIN 0 (×1.4) GAIN 1 (×2.1) GAIN 2 (×2.8) GAIN 3 (×4.2) Mode Data Rate2 ±1 VCM ±0.67 VCM ±0.5 VCM ±0.3 VCM
Analog Lead Mode3 High Performance Mode 2 kHz (0.5 Hz to 40 Hz) 12 8.5 6 5 2 kHz (0.05 Hz to 150 Hz) 20 14.5 10 8.5 2 kHz (0.05 Hz to 250 Hz) 27 18 14.5 10.5 2 kHz (0.05 Hz to 450 Hz) 33.5 24 19 13.5 16 kHz 95 65 50 39 128 kHz 180 130 105 80 Low Power Mode 2 kHz (0.5 Hz to 40 Hz) 13 9.5 7.5 5.5 2 kHz (0.05 Hz to 150 Hz) 22 15.5 12 9 16 kHz 110 75 59 45 128 kHz 215 145 116 85 Electrode Mode4 High Performance Mode 2 kHz (0.5 Hz to 40 Hz) 13 9.5 8 5.5 2 kHz (0.05 Hz to 150 Hz) 21 15 11 9 2 kHz (0.05 Hz to 250 Hz) 26 19 15.5 11.5 2 kHz (0.05 Hz to 450 Hz) 34.5 25 20.5 14.5 16 kHz 100 70 57 41 128 kHz 190 139 110 85 Low Power Mode 2 kHz (0.5 Hz to 40 Hz) 14 9.5 7.5 5.5 2 kHz (0.05 Hz to 150 Hz) 22 15.5 12 9.5 16 kHz 110 75 60 45 128 kHz 218 145 120 88 Digital Lead Mode5, 6 High Performance Mode 2 kHz (0.5 Hz to 40 Hz) 16 11 9 6.5 2 kHz (0.05 Hz to 150 Hz) 25 19 15 10 2 kHz (0.05 Hz to 250 Hz) 34 23 18 13 2 kHz (0.05 Hz to 450 Hz) 46 31 24 17.5 16 kHz 130 90 70 50 Low Power Mode 2 kHz (0.5 Hz to 40 Hz) 18 12.5 10 7 2 kHz (0.05 Hz to 150 Hz) 30 21 16 11 16 kHz 145 100 80 58 1 Typical values measured at 25°C, not subject to production test. 2 Data gathered using the 2 kHz packet/frame rate is measured over 20 seconds. The ADAS1000 internal programmable low-pass filter is configured for either 40 Hz or 150 Hz bandwidth. The data is gathered and post processed using a digital filter of either 0.05 Hz or 0.5 Hz to provide data over noted frequency bands. 3 Analog lead mode as shown in Figure 58. 4 Single-ended input electrode mode as shown in Figure 61. Electrode mode refers to common electrode A, common electrode B, and single-ended input electrode configurations. See Electrode/Lead Formation and Input Stage Configuration section. 5 Digital lead mode as shown in Figure 59. 6 Digital lead mode is available in 2 kHz and 16 kHz data rates. Rev. C | Page 10 of 85 Document Outline Features Applications General Description Revision History Functional Block Diagram Specifications Noise Performance Timing Characteristics Standard Serial Interface Secondary Serial Interface (Master Interface for Customer-Based Digital Pace Algorithm) ADAS1000/ADAS1000-1 Only Absolute Maximum Ratings Thermal Resistance ESD Caution Pin Configurations and Function Descriptions Typical Performance Characteristics Applications Information Overview ECG Inputs—Electrodes/Leads ECG Channel Electrode/Lead Formation and Input Stage Configuration Analog Lead Mode and Calculation Digital Lead Mode and Calculation Electrode Mode: Single-Ended Input Electrode Configuration Electrode Mode: Common Electrode A and Electrode B Configurations Defibrillator Protection ESIS Filtering ECG Path Input Multiplexing Common-Mode Selection and Averaging Wilson Central Terminal (WCT) Right Leg Drive/Reference Drive Calibration DAC Gain Calibration Lead-Off Detection DC Lead-Off Detection DC Lead-Off and High Gains DC Lead-Off Debounce Timer AC Lead-Off Detection ACLO and Common-Mode Configuration ADC Out of Range Shield Driver Respiration (ADAS1000 Model Only) Internal Respiration Capacitors External Respiration Path External Respiration Capacitors Respiration Carrier Frequency Evaluating Respiration Performance Extend Switch On Respiration Paths Pacing Artifact Detection Function (ADAS1000 Only) Choice of Leads Detection Algorithm Overview Pace Edge Threshold Pace Level Threshold Pace Amplitude Threshold Pace Validation Filters Pace Width Filter Biventricular Pacers Pace Detection Measurements Evaluating Pace Detection Performance Pace Width Pace Latency Pace Detection via Secondary Serial Interface (ADAS1000 and ADAS1000-1 Only) Filtering Voltage Reference Gang Mode Operation Master/Slave Synchronizing Devices Calibration Common Mode Right Leg Drive Sequencing Devices into Gang Mode Number of Devices in Gang Mode Interfacing in Gang Mode Serial Interfaces Standard Serial Interface Write Mode Write/Read Data Format Data Frames/Packets Read Mode Serial Clock Rate Data Rate and Skip Mode Data Ready (DRDYB) Detecting Missed Conversion Data SPI Interface Resync CRC Word Clocks Secondary Serial Interface RESETB PDB Function SPI Output Frame Structure (ECG and Status Data) SPI Register Definitions and Memory Map Control Registers Details Examples of Interfacing to the ADAS1000 Example 1: Initialize the ADAS1000 for ECG Capture and Start Streaming Data Example 2: Enable Respiration and Stream Conversion Data Example 3: DC Lead-Off and Stream Conversion Data Example 4: Configure 150 Hz Test Tone Sine Wave on Each ECG Channel and Stream Conversion Data Example 5: Enable Pace Detection and Stream Conversion Data Example 6: Writing to Master and Slave Devices and Streaming Conversion Data Slave Configuration Master Configuration Software Flowchart Power Supply, Grounding, and Decoupling Strategy AVDD ADCVDD and DVDD Supplies Unused Pins/Paths Layout Recommendations Outline Dimensions Ordering Guide