Reducing the component count in a system is usually a good thing. When you can reduce components and add functionality at the same time, then you really have a potential win. That’s exactly what Analog Devices claims to have done with its ADAS1000 electrocardiogram (ECG) analog front end (AFE). Dubbed as diagnostic-level silicon, the fully integrated part offers a performance level that’s capable of handling hospital and ambulance applications. Hence, it’s a no-brainer for lower-end applications.

The device also incorporates pacemaker pulse detection and respiration measurement, which are critical features of a high-performance ECG system. Without these latter two features, a separate subsystem is often required to handle both pacemaker detection and respiration measurements. A significant cost savings can be realized as a result.

The ADAS1000 ECG AFE simplifies the design of a five-electrode ECG system by combining the functionality of up to 50 parts, plus a few discrete components. The device can be configured to optimize noise performance, power, or data rate. The types of ECG systems that the device is suited for include diagnostic electrocardiographs, bedside patient monitoring systems, Holter monitors, and cardiac defibrillators. It also supports designs based on AAMI (Association for the Advancement of Medical Instrumentation) and IEC (International Electrotechnical Commission) specifications.

Some of the key specifications of the ADAS1000 include a dc-coupled channel implementation that offers simplified input switching, increased versatility, reduced power and distinct post processing advantages; operation of five ECG electrode measurements from just 19 mW, thereby making the device suitable for portable applications.

The ADAS1000 is the first in a series of AFEs. Future products will have different levels of functionality, thereby supporting the full spectrum of traditional and emerging ECG systems. The part is housed in a 10- by 10-mm package. In lots of 1000, it sells for $28. A full-featured evaluation board is available that includes the AFE, power supplies, control and interface options to ease development and manufacturing, and the ability to configure the AFE (from 5 to 12 leads) for final deployment.
 
Get more information on the ADAS1000 from our sister site, EE Times.

Richard Nass