SLAA833A May   2018  – October 2019 MSP430FR2353 , MSP430FR2355

 

  1.   How to Use the Smart Analog Combo in MSP430™ MCUs
    1.     Trademarks
    2. 1 Introduction
      1. 1.1 Smart Analog Combo (SAC) Concept
      2. 1.2 Single-Supply Amplifier Design Consideration
      3. 1.3 Smart Analog Combo Driver Library
    3. 2 Smart Analog Combo Operation Modes
      1. 2.1 General Purpose Mode
        1.       Example 1. Code Example for Smart Analog Combo General-Purpose Mode
      2. 2.2 Buffer Mode
        1.       Example 2. Code Example for Smart Analog Combo Buffer Mode
      3. 2.3 Noninverting PGA Mode
        1.       Example 3. Code Example for Smart Analog Combo Noninverting PGA Mode
      4. 2.4 Inverting PGA Mode
        1.       Example 4. Code Example for Smart Analog Combo Inverting PGA Mode
      5. 2.5 DAC Mode
        1.       Example 5. Code Example for Smart Analog Combo DAC Mode
    4. 3 Smart Analog Combo Interconnection Configuration
      1. 3.1 Smart Analog Combo Cascading
      2. 3.2 Smart Analog Combo Interconnection With Other Peripherals
    5. 4 Smart Analog Combo Use Cases in Sensing Applications
      1. 4.1 Use Smart Analog Combo in Smoke Detector
      2. 4.2 Use Smart Analog Combo in Current Loop
    6. 5 References
  2.   Revision History

How to Use the Smart Analog Combo in MSP430™ MCUs

Operational amplifiers (op amps or OAs) are used extensively in sensing and measurement applications. MSP430™ microcontrollers (MCUs) provide full signal chain implementation with the integrated smart analog combo (SAC) to replace external op amps. The smart analog combo is a configurable analog peripheral that includes a high-performance low-power op amp, a programmable gain amplifier (PGA) with gain up to 33, and a 12-bit digital-to-analog converter (DAC). This application report describes how to use the SAC module in MSP430 MCUs. SAC concept, operation modes, internal connection, ROM-based driver library, and design consideration are described. This application report also describes SAC use cases and the benefits of using the module in smoke detector and current loop applications.