Pulse oximeter

Products and reference designs

Pulse oximeter

Block diagram

Overview

Our integrated circuits and reference designs for pulse oximeters help you achieve highly-accurate photodiode measurements while reducing power consumption and enhancing ease of use through wireless connectivity.

Design requirements

    Modern pulse oximeter designs require:

  • Accurate sensor measurement to derive oxygen saturation levels and heart rate.
  • Power management efficiency for reducing heat and maximizing operating life.
  • Additional parameters to be derived such as PTT when combined with other subsystems.

TI products may not be used in life-critical medical equipment unless authorized officers of the parties have executed a special contract specifically governing such use. See our Terms of Sale for additional information.

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Block diagram

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Pulse oximeter

RED LED RED LED IR LED IR LED Battery Battery Memory card Memory card AC AC Photo diode Photo diode AC/DC adapter AC/DC adapter MOSFET MOSFET PWM controller PWM controller Rectifier Rectifier Battery management Battery management Battery charger Battery charger Battery authentication Battery authentication Battery gauge Battery gauge Authentication Authentication 1-wire memory 1-wire memory Output user interface Output user interface REF REF DAC DAC AMP AMP Backlight power Backlight power Display driver Display driver ESD ESD Piezo/haptics driver Piezo/haptics driver Clocking Clocking RTC RTC Clock buffer Clock buffer Clock generators Clock generators Clock oscillators Clock oscillators Line protection Line protection ESD diodes ESDdiodes ESD diodes ESDdiodes Sensor front end Sensor front end ADC ADC TIA TIA Buffer/filter Buffer/filter PGA PGA REF REF Amp Amp REF REF DAC DAC Temp sensor Temp sensor LED driver LED driver DPOT DPOT Analog switch Analog switch Digital processing Digital processing MCU/DSP MCU/DSP Input user interface Input user interface Touchscreen controller Touchscreen controller Capacitance to digital converter Capacitance to digital converter Keypad controller Keypad controller Inductance to digital converter (button detect) Inductance to digital converter (button detect) Haptics driver Haptics driver Wired interface Wired interface Ethernet PHY Ethernet PHY USB USB REF REF DAC DAC AMP AMP Current limit switch Current limit switch ESD ESD Low voltage power supply Low voltage power supply Supervisor/reset Supervisor/reset LDO LDO Buck-boost Buck-boost Buck Buck Boost Boost Load switch/eFuse Load switch/eFuse

Technical documentation

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Type Title Date
White paper Evolving Semiconductor Technologies for Modern Telehealth Applications 28 Oct 2020
White paper Evolving Semiconductor Technologies for Modern Telehealth Applications 28 Oct 2020
White paper 持續進化的現代遠距照護應用半導 體技術 14 Dec 2020
White paper Fortschrittliche Halbleitertechnologie für moderne Telemedizin-Anwendungen 14 Dec 2020

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