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Analog Devices unveils integrated AFE subsystem for diagnostic-quality ECG applications

February 09, 2011 | Paul Buckley | 222902199
Analog Devices unveils integrated AFE subsystem for diagnostic-quality ECG applications Analog Devices, Inc., has introduced the first device in a new series of fully integrated analog front-end AFE chips that enable an electrocardiogram (ECG) system, which measures and records the electrical activity of a human heart in detail, to achieve monitor- and diagnostic-quality performance. The device also incorporates pacemaker pulse detection and respiration measurement, which are critical features of any high-performance ECG system.
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The ADAS1000 ECG AFE simplifies the design of a five-electrode ECG system by reducing the signal chain bill of materials from up to 50 components down to the ADAS1000 single chip plus a few discrete components. The device can be configured to optimize noise performance, power, or data rate - making it suitable for home, ambulatory, and clinical ECG systems. Future products in the series will provide optimized features and functionality to support traditional and emerging ECG system applications.

The ADAS1000 is effective for a wide variety of ECG systems, including diagnostic electrocardiographs, bedside patient monitoring systems, Holter monitors, and cardiac defibrillators.

The ADAS1000 AFE, which offers seamless scalability for high-lead-count systems, requires a minimum number of additional external components and provides several digital output interface options. The ADAS1000 AFE can also support designs based on AAMI (Association for the Advancement of Medical Instrumentation) and IEC (International Electrotechnical Commission) specifications.

Additional key features and benefits of the ADAS1000 include:
  • A dc-coupled channel implementation that offers simplified input switching, increased versatility, reduced power and distinct post processing advantages;
  • Operates 5 ECG electrode measurements from as little as 19 mW. Any unused channels or features can be conveniently disabled to further minimise power to as low as 11 mW for one lead;
  • Low noise performance (10 V pk-pk over 0.05 Hz to 150 Hz) to support end equipment regulatory standards;
  • Different data frame rates (2 kHz, 16 kHz, 128 kHz) are available to ensure ultimate ease in data capture;
  • The ability to simplify overall design, eliminate many discrete components, reduce overall system size, power consumption, and development time.
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