A few days ago, Texas Instruments (TI) announced the launch of the industry's first fully integrated analog front end (AFE) product line for photometry. The latest analog integrated circuit (IC) is in line with TI HealthTech ’s vision and can help engineers design innovative electronic products that improve the health care conditions worldwide. The AFE44xx series is highly integrated with all front-end components and direct connected timing control circuits for typical photometric solutions. It can be widely used in clinical and home health pulse oximeters, photometric blood glucose meters, and photoplethysmograph heart rate monitors.
AFE44xx series products integrate a fully programmable transceiver circuit in a single device. Compared with discrete solutions, it can not only accelerate the design process of terminal equipment manufacturers, reduce board space, but also reduce the expertise in analog design. demand. This series supports less than 1mA power consumption, lower power consumption than discrete solutions, and can extend battery life. The AFE44xx series can achieve the best measurement performance even under ambient lighting settings.
The highly integrated, low-power AFE44xx series supports smaller, more portable traditional photometric solutions, and can fully meet the emerging market needs for wireless and smart connection pulse oximeter accessories. In addition, the AFE44xx series also offers AFE4490 for clinical applications and AFE4400 for home health applications.
Main features and advantages :
(1) Faster time to market and smaller form factor: The receive path of the AFE44xx series includes a programmable transimpedance amplifier (TIA), environmental noise cancellation circuit, and analog-to-digital converter (ADC). The transmit path includes an LED driver and a programmable 8-bit power supply with a current of up to 150 mA. Integrating the transceiver path in a single device can significantly reduce the time and board space required for device design;
(2) Low power consumption: AFE44xx series current consumption is less than 1 mA, which can extend the battery life;
(3) Simple diagnosis can simplify design and debugging: AFE44xx series of open circuit / short circuit detection function helps engineers more easily diagnose system failures in the design process;
(4) Lower system software requirements: AFE44xx series provides highly flexible integrated timing controller modules, which can significantly reduce system software requirements and overhead.
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