Texas Instruments Adds On-Chip Respiratory Measurements to the ECG/EEG Analog Front End Series

On April 19, 2011, based on its award-winning ADS1298 product family, Texas Instruments announced the industry's first fully-integrated analog front end (AFE) that supports on-chip respiration impedance measurements. These fully-featured 24-bit AFEs integrate more than 40 discrete components, simplifying the implementation of the breath detection function in portable ECG devices and reducing the number of components by 97%. This product has extremely low power consumption and is 95% lower than the vertical solution. This AFE is available in 8-channel, 6-channel, and 4-channel versions.

Key Features and Benefits • Provides 20 milliohm resolution of respiratory impedance for accurate monitoring and correlation of patient breathing in ECG abnormalities;

·Integrated with 44 discrete components that can reduce board space by 97%. In addition to the fully integrated respiratory impedance function and user-selectable phase adjustment, the ADS1298R device also includes eight analog-to-digital converters (ADCs), eight programmable gain amplifiers (PGAs), eight active filters, and a speed detection interface. , lead off detection, reference voltage and right leg drive (RLD);

The unit channel power consumption is only 750 uW, which is 95% lower than the vertical solution; multiple power off configurations are provided to extend the battery life of portable patient monitoring equipment;

• The typical 4 uVpp input reference noise is superior to the International Electrotechnical Commission's IEC60601-2-27/51 standard, enabling extremely high accuracy for portable and high channel density ECG devices;

The TMS320C5515 ultra-low power DSP, which is less than 0.15 mW/MHz, complements the industry-leading low-power ADS1298R to extend battery life even further. Tools and Support The ADS1298R is equipped with an evaluation platform. The ADS1298R Performance Demonstration Kit (ADS1298RECGFE-PDK) includes easy-to-use evaluation software, built-in analysis tools (including oscilloscope, FFT, and histogram display), flexible input configuration, and external selectable reference circuitry, which can be used in simple test files Exports data for post-processing.

An IBIS model is also provided for verifying board signal integrity requirements.

Availability and packaging The ADS1298R device in an 8mm x 8mm BGA package is available now.

ADS1298 ECG/EEG AFE Series In 2010, ADS1298 won the title of “Electronic Design Technology”, “Electronic Product” and “Annual Honor Product” granted by EN-Genius for its innovative design. Compared with discrete solutions, the ADS1298 series can not only reduce the number of components and power consumption by 97%, while also supporting advanced features such as respiratory, ECG and heart rate monitoring and non-invasive blood pressure and patient temperature monitoring.

In addition to the ADS1298R, ADS1296R, and ADS1294R, the ADS1298 family also includes the following products (currently available for delivery):

· 24-bit AFE for high-performance portable ECG/EEG (Electroencephalography) devices: 8-channel ADS1298, 6-channel ADS1296, and 4-channel ADS1294;

• 16-bit AFE for low-cost portable ECG devices: 8-channel ADS1198, 6-channel ADS1196, and 4-channel ADS1194.