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.

Features
Up to 8 LED drivers and 6 photodiode input pins.
Small Wafer-Level-Chip-Scale-Package
WLCSP).
Embedded low noise analog front-end for ECG
signals acquisition.
Synchronized PPG and ECG acquisition.
Low noise analog front-end for PPG acquisition
Analog electrical front-end (e.g. for temperature
sensing using a NTC or galvanic skin resistivity
GSR)).
Hardware sequencer to offload processor.
Adjustable LED driver with current control.
2 PPG channels useable in simultaneous mode
available
ECG and PPG channels separated and
simultaneous useable

Applications
● Optical sensor platform
● Fitness band
● Smart watch
● Smart patches
● Heart rate monitor
● Hearables
● ECG monitoring
● Cuff-less blood pressure measurements