Next-generation medical and health AFE sensors for vital sign monitoring

ams OSRAM AS7056 and AS7057 Medical and Health Sensors, available now from Mouser, are next-generation AFE vital sign sensors. The devices enable users to detect biosignals such as PPG, PTT, and proximity. PPG is the most used HRM method, measuring the pulse rate by sampling light modulated by blood vessels, expanding and contracting as blood pulses through them. Apart from HRM/HRV, optical blood pressure and SpO2 are also enabled by the two independent working photodiode inputs of the devices.

The sensors are optimised to support space-limited applications such as in-ear vital sign monitoring. The AS7056 features two LEDs and one VCSEL driver output, samples up to three photodiode inputs, and supports proximity detection incorporated into one of the PPG signal channels. The AS7057 provides three LED driver outputs, samples up to three photodiode inputs, and supports proximity detection incorporated into one of the PPG signal channels. The devices provide high flexibility for several LED and photodiode arrangements in various applications. The medical and health sensors also employ two ADC channels for simultaneous PPG measurements and an automatic photodiode offset control.

They are housed in a WLCSP. The sensor’s low-power design and small form factor are ideal for earbuds, fitness bands, smartwatches, sports watches, and smart patches.