SPO2 Analog Front-end | ASTRI - Hong Kong Applied Science And Technology Research Institute Company Limited

The SPO2 analog front-end is a fully integrated analog solution for medical pulse oximeter applications.

It supports flexible pulse sequencing and timing control from 200Hz to 1KHz for individual LED and up to 3 LEDs at same time.

Key features:

Transmitter:

Integrated LED driver (H-Bridge, push or pull)
8 bit programmable LED current range from 25mA, 50mA, 75mA to 100mA
Independent LED3, LED2, LED1 current reference

Receiver:

Input-referred noise: 50 pA (RMS) (at 5 μA powerdown current)
5 noise-free bits (at 5 μA powerdown current)
Analog ambient cancellation scheme with selectable 1 μA to 10 μA ambient current
I-V amplifier with seven separate LED2 and LED1 programmable feedback R and C settings
Reconfigurable 12/16/20 bit ADC depending on applications

More about ASTRI

Hong Kong Applied Science and Technology Research Institute (ASTRI) was founded by the Government of the Hong Kong Special Administrative Region in 2000 with the mission of enhancing Hong Kong’s competitiveness through applied research. ASTRI’s core R&D competence in various areas is grouped under five Technology Divisions: Advanced Electronic Components and Systems; Artificial Intelligence and Trust Technologies; Communications Technologies; Innovative Mind; and IoT Sensing and AI Technologies. It is applied across six core areas which are Smart City, Financial Technologies, New Industrialisation and Intelligent Manufacturing, Digital Health, Application Specific Integrated Circuits and Metaverse.

Over the years, ASTRI has nurtured a pool of research, I&T talents and received numerous international awards for its pioneering innovations as well as outstanding business and community contributions. As of 2023/24, ASTRI has transferred more than 1,500 technologies to the industry and has been granted over 1,100 patents in the Mainland, the US, and other countries.

As a Hong Kong R&D centre, one of ASTRI’s important goals is to help customers harness business opportunities from the thriving technology market and increase their competitive strengths. Customers and partners can improve their efficacy by drawing on ASTRI’s expertise and research achievements.