Single/dual channel,16-/24-bit ECG/EEG AFEs are industry’s first

Single/dual channel,16-/24-bit ECG/EEG AFEs are industry’s first

As part of the ADS1298 ECG/EEG AFE family, the 16-bit/1-ch ADS1191, 16-bit/2-ch ADS1192, 24-bit/1-ch ADS1291, 24-bit/2-ch ADS1292, and 24-bit/2-ch ADS1292R ECG and EEG AFEs are the first to offer 16- and 24-bit resolution with 1 or 2 channels. The devices are claimed to cut power consumption by more than 94 % (consuming just 335 µW/ch) compared to discrete implementations, while shrinking board space requirements up to 86%. These reductions will enable portable medical, sports and fitness equipment that combines long battery life with a form factor that is smaller, lighter and easier to wear.

The parts integrate low-noise PGAs, test signals, a right leg drive amplifier, oscillator, voltage reference, and lead-off detection function. They also feature input-referred noise below 8 µVpp to support Association for the Advancement of Medical Instrumentation (AAMI) and International Electrotechnical Commission (IEC) end-equipment performance requirements.

Common applications for the new AFEs include Holter and fitness heart-rate monitors. For example a two-channel Holter based on the ADS1292 consumes 94% less power while using up to 92% less board space and 92% fewer components than an equivalent discrete implementation.They are housed in a 7 x 7-mm TQFP package. (ea/1,000 — ADS1191, $1.50; ADS1192, $2.50; ADS1291, $2.00, ADS1292, $3.50; ADS1292R with respiration impedence, $4.50 available now)

By Christina Nickolas

Texas Instruments , Dallas , TX
Information 800-477-8924
www.ti.com