Date: 10/04/2011

Analog AFE IC from TI for ECG/EEG packs full of functions and performance

Texas Instruments Incorporated has introduced fully-integrated AFEs with on-chip respiration impedance measurement in full production. The 24-bit ADS1298R devices simplify the implementation of respiration detection in portable electrocardiogram (ECG) equipment by integrating more than 40 discrete components, reducing component count as much as 97 percent, and they are also extremely power efficient, using up to 95 percent less power than discrete implementations, claims TI. ADS1298R devices are available in eight-, six-, and four-channel versions.

Key features and benefits:
Provides respiration impedance at a resolution of 20 milliohms, enabling the accurate monitoring and correlation of patient respiration to ECG abnormalities.
Fully-integrated respiration impedance function with user-selectable phase adjustment.
packs eight analog-to-digital converters (ADCs), eight programmable gain amplifiers (PGAs), eight active filters and pace detect interface, lead off detection, voltage reference, right leg drive (RLD).
Uses 750 uW/channel with multiple power-down configurations to increase the battery life of portable patient monitoring devices.
Typical 4-uVpp input-referred noise surpasses the International Electrotechnical Commission's IEC60601-2-27/51 standard.
An IBIS model to verify board signal integrity requirements is available.

Availability and packaging: ADS1298R devices are all available today in an 8-mm x 8-mm BGA package. 1,000-unit pricing is as follows: eight-channel ADS1298R for $25.95; six-channel ADS1296R for $19.95 and four-channel ADS1294R for $13.95.

In addition to the ADS1298R, ADS1296R and ADS1294R, the ADS1298 family includes the following:
24-bit AFEs for high-performance, portable ECG/ EEG (electroencephalogram) equipment: Eight-channel ADS1298, six-channel ADS1296 and four-channel ADS1294.
16-bit AFEs for cost-sensitive, portable ECG equipment: Eight-channel ADS1198, six-channel ADS1196 and four-channel ADS1194.

For more info visit www.ti.com