General Description
The AS7050 Biosignal Sensor Analog Frontend is the next generation Vital Sign Sensor. It enables
the user to detect biosignals such as photoplethysmogram (PPG), electrocardiogram (ECG) and
galvanic skin resistance (GSR). PPG is the most used HRM method. It measures the pulse rate by
sampling light modulated by the blood vessels, which expand and contract as blood pulses through
them. ECG is the reference for any measurement of the biopotential generated by the heart.
Compared to the previous ams OSRAM biosignal sensor generation, AS7050 is a biosignal converting
unit. The AS7050 provides up to 8 LED driver outputs, samples up to 6 photodiode inputs and
supports external electrodes. This enables the highest flexibility for several LED and photodiode
arrangements in different applications. Furthermore, the AS7050 Biosignal Sensor Analog Frontend
provides 2 ADC channels for simultaneous PPG and ECG measurements and an automatic
photodiode offset control.
The embedded ECG analog front-end satisfies IEC 60601-2-47 requirements.
The AS7050’s low-power design and small form factor are particularly well suited to application in
fitness bands, smartwatches, sports watches, smart patches and earbuds. In these cases, board
space is limited, and users look for extended, multi-day intervals between battery recharges. Thin
package dimension makes the AS7050 suitable for height constrained solutions like earbuds.
Applications
Optical sensor platform
Fitness band
Smart watch
Smart patches
Heart rate monitor
Hearables
ECG monitoring
Cuff-less blood pressure measurements