TIDUF53 December   2023 DRV8210 , INA350 , MSPM0L1306

 

  1.   1
  2.   Description
  3.   Resources
  4.   Features
  5.   Applications
  6.   6
  7. 1System Description
    1. 1.1 Terminology
    2. 1.2 Key System Specifications
  8. 2System Overview
    1. 2.1 Block Diagram
    2. 2.2 Design Considerations
      1. 2.2.1 System Design Theory
      2. 2.2.2 Bridge Biasing
      3. 2.2.3 INA Stage
      4. 2.2.4 Filter Design
    3. 2.3 Highlighted Products
      1. 2.3.1 MCU-MSPM0L1306
      2. 2.3.2 OPA-LMV324A
      3. 2.3.3 LDO-TPS7A2433
      4. 2.3.4 INA350
      5. 2.3.5 DRV8210
      6. 2.3.6 ATL431LI
  9. 3Hardware, Software, Testing Requirements, and Test Results
    1. 3.1 Hardware Requirements
      1. 3.1.1 System Connection
    2. 3.2 Software Requirements
    3. 3.3 Running the Demonstration
    4. 3.4 Test Results
  10. 4Design and Documentation Support
    1. 4.1 Design Files
      1. 4.1.1 Schematic
      2. 4.1.2 BOM
      3. 4.1.3 PCB Layout Recommendations
    2. 4.2 Tools and Software
    3. 4.3 Documentation Support
    4. 4.4 Support Resources
    5. 4.5 Trademarks
  11. 5About the Author

2.3.2 OPA-LMV324A

The LMV324A is a quad low-voltage (2.5 V to 5.5 V) operational amplifier with rail-to-rail output swing, 5.1-µVPP 1/f noise, ±1 mV input offset, 10-pA input bias current, and quiescent currents of 70 µA/Ch. The LMV324A is the most cost-effective design for applications where low-voltage operation, space saving, and low cost are required. Additional features of the LMV324V are a common-mode input voltage range that includes ground, 1-MHz unity-gain bandwidth, and 1.7-V/μs slew rate. Figure 2-9 shows the functional block diagram.

One of the amplifiers is used to bias the pressure sensor with a constant current. A second amplifier is used to create a bias reference voltage used for the INA and band-pass filters. The remaining amplifiers are used for a two-stage band-pass filter.

GUID-20231204-SS0I-X81F-5GS7-JBFJNSQQMMCF-low.svgFigure 2-9 LMV324A Functional Block Diagram