Asset Publisher

AS7050 Medical and Health Sensor - Analog Frontend

Biosignal Converting Unit


  • Up to 8 LED and 6 PD
  • Embedded low noise analog front-end for ECG acquisition
  • Sychronized PPG and ECG channels
  • Low noise analog optical front-end
  • Temperature sensing via NTC or galvanic skin resistivity possible
  • ECG and PPG channels separated and simultaneous useable


  • High flexible LED/PD configuration
  • Allows smallest application size
  • ECG with dry electrodes
  • Good HRM measurement quality
  • Enables blood pressure measurement
  • Aquiring several biosignals in parallel

Product parameters

Supply Voltage [V] 1.7 - 1.98
I²C Bus I²C slave, fast mode plus (1 MHz), fast mode (400 kHz) and standard mode (100 kHz)
Temperature Range [°C] -30 to 85
Package WLCSP
LED Configuration -
Supported Algorithms HRM, HRV, SpO2, Blood Pressure

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 solution likes earbuds.

This product suits for the following applications:

  • Smart watches
  • Fitness band
  • Heart rate monitoring
  • ECG monitoring
  • Cuffless blood pressure measurement
  • Optical sensor platform
  • Smart patches
  • Hearables


Title Category Headline Buy
AS7050 Eval Kit Application Board Evaluation Kit for AS7050


Type Description Language
Library AS7050 Schematic and Footprint EN
Evaluation Software Evaluation Software for Windows with Firmware v3.2.0 EN
Evaluation Software Evaluation Software for macOS with Firmware v3.2.0 EN
Evaluation Software Evaluation Software for Linux with Firmware v3.2.0 EN
Demo AS7050 Eval Kit Schematic EN

Technical documents

Type Description Language
Application Note AS7050 SpO2 Calibration English
Special Datasheet AS7050 Short Datasheet English
Other Product Document AS7050 Design Guidelines English

Other information

Type Description Language
Block Diagram AS7050 Block Diagram
Factsheet Analog Frontend for Vital Sign Monitoring English
Image AS7050 Image (bottom view)
Image AS7050 Image (top view)
Asset Publisher

Related products