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ADI's meter-on-a-chip aimed at portable health apps

Posted: 08 Jan 2014  Print Version  Bookmark and Share

Keywords:ADI  meter-on-a-chip  health app  sensor 

Analog Devices Inc. (ADI) has introduced what it describes as a high-precision, low-power meter-on-a-chip for various portable health applications such as point-of-care diagnostics, home/self-test health devices, and wearable vital signs monitors, including those for sports and fitness. The ADuCM350 single-chip, scalable platform combines a 16bit accurate analog front-end (AFE), which includes a configurable multi-sensor switch matrix, hardware waveform generator and discrete Fourier transform (DFT) engine, with a processing subsystem and an industry-standard software development environment to support a complete product development roadmap, noted the firm.

The ADuCM350 meter-on-a-chip promises to offer easy connectivity to passive and active sensors and supports sensor fusion functionality that enables exceptionally accurate measurements of human physiological data even in the presence of interferers. It is also optimized for system-level performance and signal measurement accuracy, including those monitoring devices powered by a single coin-cell battery, and features a 160kSPS ADC, ±0.2 percent accurate voltage reference, and a 12bit DAC.

Passive complex impedance sensing on the ADuCM350 enables baseline detection and detailed information of physiological, biological and electrochemical reactions, at levels previously unattainable. The fusion of passive and active sensors provides an additional level of signal measurement accuracy, and environmentally robust capacitance-to-digital technology on-chip supports new use cases such as skin electrode detection and next-generation electrochemical test strip technologies. The precision AFE performs auto-calibration ensuring accurate, repeatable measurements in the field for the life of the product.

The ADuCM350 healthcare meter-on-a-chip is a flexible platform that supports full product development roadmaps from entry-level to feature-rich devices. Sensor fusion functionality allows designers to expand product measurement capabilities. For example, the ADuCM350 platform can support calorie burn applications by combining galvanic skin response for heart rate and respiration, with an ultra-low-power 3-axis MEMS accelerometer for altitude and motion detection. An extensive peripheral set of communication I/O including USB, audio, display, serial and touch supports differentiation and rapid feature expansion. The ADuCM350 AFE sequencer enables designers to develop the software for a measurement procedure only once and then reliably port it across an entire product family.

Samples of the ADuCM350 are available with full production slated for April this year. The device can be had for $7.50 each per 1k units in 8 x 8mm 120-pin CSP_BGA package.





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