SLAA835B May   2018  – August 2018 MSP430FR2353 , MSP430FR2355

 

  1.   Smart Analog Combo Enables Tomorrow's MCU-Based Sensing and Measurement Applications
    1.     Trademarks
    2. 1 Introduction
    3. 2 Smart Analog Combo Applications
      1. 2.1 Smoke Detection
      2. 2.2 Gas or PM2.5 Detector
      3. 2.3 Blood Glucose Meter or Oximeter
      4. 2.4 Current-Loop Transmitter
      5. 2.5 Small Form-factor Pluggable (SFP) optical transceivers
      6. 2.6 Audio Applications
    4. 3 Conclusion
    5. 4 References
  2.   Revision History

2.3 Blood Glucose Meter or Oximeter

A current-to-voltage converter (usually a trans-impedance amplifier with low-leakage input) measures the test strip current, with an optional second-stage voltage signal conditioner before analog-to-digital conversion.This application uses two 12-bit DAC modules: one for the test-strip-driven voltage and the other for audio source generation. Figure 4 shows a BGM application block diagram using three smart analog combo SAC-L3 configurations.

block-diagram-blood-glucose-meter.pngFigure 4. Block Diagram of a Blood Glucose Meter Using the MSP430 Smart Analog Combo