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AS7038RB Vital Sign Sensor

Smart Health & Fitness Solution


  • Improved optical path and integrated red+NIR filter
  • 250% larger embedded photodiode
  • Embedded low noise analog front end for ECG signal acquisition
  • Synchronized PPG and ECG acquisition
  • Low noise analog optical front end


  • Address all skin types and enables continous SpO2 measurements
  • Improved sensitivity, higher optical noise ratio
  • Electrocardiogram ECG with dry electrodes
  • Enabling blood pressure measurements
  • Improved HRM measurement quality

Product parameters

Supply Voltage [V] 2.7 - 5.5
I²C Bus I²C slave, Standard (100kHz) and Fast Mode (400kHz)
Temperature Range [°C] -30 to 70
Package OLGA-22
LED Configuration -
Supported Algorithms SpO2, Blood Pressure, Heart Rate, Heart Rate Variability

General description

The operation of the AS7038RB is based on photoplethysmography (PPG) and electrocardiogram (ECG).
PPG is the most used HRM method which 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 bio potential generated by the heart. The AS7038RB is supported by algorithms converting the PPG and ECG readings into digital HRM, HRV, Continuous Blood Pressure and SpO2 values. The cuff-less Blood Pressure Measurement has been optimized to fulfill the IEEE Std 1708-2014.
The detector includes the photo-sensor, analog front-end (AFE) and sequencer as well as application software. In addition to HRM/HRV, Blood Pressure and SpO2, the detector also enables skin temperature and skin resistivity measurements by providing interfaces to external sensors.
The AS7038RB’s low-power design and small from factor is particularly well suited to application in fitness bands, smart watches, sports watches and smart patches, in which board space is limited and in which users look for extended, multi-day intervals between battery recharges.

This product suits for the following applications:

  • Fitness band
  • Smart watch
  • Heart rate and SpO2 monitors
  • Cuff less blood presssure measurements
  • ECG monitoring
  • Optical sensor platform


Title Category Headline Buy
AS703x Eval Kit Application Board Evaluation Kit for AS703x


Type Description Language
Evaluation Software Evaluation Software with Firmware included for AS7030B, AS7038GB, AS7038RB EVKs - For USB Version EVK EN
Evaluation Software Evaluation Software with Firmware included for AS7030B, AS7038GB, AS7038RB EVKs - For Bluetooth Version EVK EN

Technical documents

Type Description Language
Datasheet AS7038RB Biosensor solution with embedded ECG channel English
Other Product Document AS7038GB_AS7038RB Design Guidelines English

Environmental documents

Type Description Language
RoHS Certificate RoHS Certificate AS7038RB English

Other information

Type Description Language
Block Diagram AS7038RB Block Diagram English
Image AS7038GB Bottom view English
Image AS7038GB Bottom perspective view English
Image AS7038GB Top view English
Image AS7038GB Top perspective view English
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