TI zintegrowała w analogowym stopniu wejściowym rodziny układów ECG/EEG obwód do pomiaru parametrów oddychania
Bazując na nagrodzonym układzie ADS1298 stanowiącym analogowy stopień wejściowy (AFE – analog front-end), firma Texas Instruments (TI) wprowadza do pełnej produkcji pierwszy w branży w pełni zintegrowany układ AFE zawierający obwód pomiaru oporu systemu oddechowego. Dzięki scaleniu ponad 40 elementów dyskretnych, 24-bitowa rodzina układów ADS1298R upraszcza implementację detekcji oddechu w przenośnym sprzęcie EKG redukując liczbę niezbędnych komponentów zewnętrznych o 97%.
Te układy cechują się również niezwykle wysoką sprawnością energetyczną i zużywają do 95% mniej energii niż rozwiązania na elementach dyskretnych. Układy ADS1298R są dostępne w wersjach 8-, 6- i 4-kanałowej.
Więcej informacji:
www.ti.com/ads1298r-preu
Dalej po angielsku:
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.
- Integrates 44 discrete components, reducing board space up to 97
percent. In addition to a fully-integrated respiration impedance function
with user-selectable phase adjustment, ADS1298R devices include 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) and more.
- Uses only 750 uW/channel, up to 95 percent lower power consumption than
discrete implementations, 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, enabling extremely
high levels of accuracy in portable and high-channel-density ECG equipment.
- Complementing the leading power consumption of the ADS1298R is the
TMS320C5515 ultra-low-power DSP, which uses less than 0.15 mW/MHz to further
extend battery life.
Tools and support
An evaluation platform is available
for the ADS1298R devices. The ADS1298R Performance Demonstration Kit
(ADS1298RECGFE-PDK) includes easy-to-use evaluation software; built-in analysis
tools, including oscilloscope, FFT and histogram displays; flexible input
configurations; optional external reference circuits; and the ability to export
data in simple test files for post processing.
An IBIS model to verify board signal integrity requirements is also
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.
ADS1298 ECG/EEG AFE family
In 2010, the ADS1298 was
honored for its innovative design with prestigious product of the year awards
from EDN China, Electronic Products and EN-Genius. The ADS1298 family reduces
component count and power consumption by up to 97 percent compared to discrete
implementations while enabling advanced functionality, such as respiration, ECG
and heart rate monitoring, as well as non-invasive blood pressure and patient
temperature monitoring.
In addition to the ADS1298R, ADS1296R and ADS1294R, the ADS1298 family
includes the following, which are all available today:
- 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.
Find out more about TI's analog front end and medical portfolio at
the links below:
201104181119.4.2011Technika pomiarowaTexas Instruments