ams OSRAM AS7056/57

The AS7056/57 biosignal sensor analog frontend (AFE) is the next generation Vital Sign Sensor. It enables the user to detect biosignals such as photoplethysmogram (PPG used for Heart Rate Monitoring) and pulse transit time (PTT), as well as proximity sensing, Blood Pressure and SpO2 measurement. AS7056/57 is optimized in size and performance to support space-limited applications such as in-ear vital sign monitoring.

AS7056 provides two LEDs and one V_CSEL driver outputs, AS7057 provides three LED driver outputs, both variants sampling up to three photodiode inputs enabling high flexibility for several LED and photodiode arrangements.

Key features

• AS7056 - 2 LED drivers + 1 V_CSEL driver and 3 photodiode input pins
• AS7057 - 3 LED drivers and 3 photodiode input pins
• Smallest wafer level chip scale package on the market
• Two synchronized PPG acquisition channels

Additional features

• Two independent, programmable sequence blocks inside the PPG signal acquisition
• Flexible system design with newest emitter technology possible
• Hardware sequencer to offload processor.
• Adjustable LED driver with current control
• Small size application possible, e.g. in-ear vital sign monitoring for hearables
• Enables optical blood pressure measurement
• Enables proximity detection for additional energy savings
• Long operating time

Applications

• Earbuds
• Hearables
• Optical sensor platform
• Fitness band
• Smart watch
• Smart patches
• Heart rate monitor
• Cuff-less optical blood pressure measurements