SLAA828B March   2018  – August 2021 MSP430FR2000 , MSP430FR2032 , MSP430FR2033 , MSP430FR2100 , MSP430FR2110 , MSP430FR2111 , MSP430FR2310 , MSP430FR2311 , MSP430FR2422 , MSP430FR2433 , MSP430FR2512 , MSP430FR2522 , MSP430FR2532 , MSP430FR2533 , MSP430FR2632 , MSP430FR2633 , MSP430FR4131 , MSP430FR4132 , MSP430FR4133

 

  1.   Trademarks
  2. 1Introduction
  3. 2ADC Low-Power Sampling Software Design
    1. 2.1 System Clock Source Selection
    2. 2.2 ADC Clock Source Selection
    3. 2.3 Initialization of Unused GPIO Pins
  4. 3ADC Error Correction and Experimental Testing
    1. 3.1 Error Correction
    2. 3.2 Accuracy Test
  5. 4Time-Division Multiplexing of the ADC to Achieve Additional Channel Acquisition
  6. 5Summary
  7. 6References
  8. 7Revision History

3.2 Accuracy Test

Table 3-1 lists the test data that uses the on-chip 10-bit ADC to detect supply voltage.

Table 3-1 Use the 10-Bit ADC to Measure the Supply Voltage Test Data
Power Supply (V) (1) ADC Raw Without Calibration (V) With Calibration (V) Error (With Calibration)
2.562 597 2.570 2.569 0.27%
2.812 544 2.820 2.819 0.24%
3.327 461 3.328 3.327 0%
(1) Experimental conditions:
  1. Test hardware is the MSP430FR4133 LaunchPad development kit
  2. Factorgain = 0x8011, ADCoffset = 0
  3. Room temperature