SLAT164 august   2023 MSPM0L1306


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The pulse oximeter is a medical device which measures the oxygen level and heart rate of a person. TI’s MSPM0 Arm® Cortex®-M0+ microcontrollers (MCUs) can help engineers optimize the design and performance of pulse oximeters. The MSPM0L1306 provides a low-cost, single-chip solution by integrating required components of the pulse oximeter signal chain. The operational amplifiers (OPAs) within the MSPM0L1306 serve as the trans-impedance amplifier (TIA) and current control driver with their zero-drift, low-noise capabilities. The integrated high-speed analog to digital convertor (ADC) allows oversampling to achieve high levels of dynamic range. This design features a graphical user interface (GUI) to visualize photoplethysmography (PPG) waveforms and measurements of heart rate and peripheral oxygen saturation (SpO2).

GUID-20230814-SS0I-HZR8-MBLT-C1PFSC8WCHPJ-low.pngBlock Diagram
GUID-20230814-SS0I-CN5X-1C4J-MDBSQ3CLNMXR-low.png GUI


  • Achievable heart rate and perfusion range of 30 – 240 BPM (beats per minute) and 0.1% – 20% perfusion index (PI) for wide variety of pulse strengths and greater reliability
  • 90-dB dynamic range achievable from internal 12-bit ADC through oversampling
  • Standard display resolution of 1 BPM and 1% SpO2 for accurate vitals readings
  • Longer battery life with ultra-low (< 83 nA) shutdown current during device off-time