Integrated analog front end for photometry unveiled

Presented as the first such device of its type available, a family of fully-integrated analog front ends (AFEs) for photometry has been released by Texas Instruments. The devices support TI HealthTech's vision for helping engineers design innovative electronics for transforming healthcare worldwide. The AFE44xx family integrates all the front end components and associated timing control circuitry of a typical photometry solution. Applications include clinical and home health pulse oximeters, photometry-based blood glucose meters, and photoplethysmograph-based (PPG) heart rate monitors. By incorporating fully programmable transmitter and receiver circuits into one device, the AFE44xx family reduces end equipment manufacturers' design time, board space and need for in-house analog design expertise compared to discrete solutions. With less than 1-mA supply current, the AFE44xx family consumes less power than discrete solutions, which results in longer battery life. The AFE44xx family enables optimal measurement performance, even in ambient light settings. With its high level of integration and low power, the AFE44xx family enables smaller, more portable traditional photometry solutions, as well as the new emerging market of wireless and smart connected pulse oximeter accessories. Available in the AFE44xx family are the AFE4490, targeted at clinical applications; and the AFE4400, targeted for home health applications. AFE44xx family Texas Instruments