SLAA475A October   2010  – March 2019 MSP430L092

 

  1.   MSP430x09x Analog Pool: Feature Set and Advanced Use
    1.     Trademarks
    2. 1 MSP430x09x Overview
    3. 2 Analog Pool (A-Pool)
      1. 2.1  Input Dividers
      2. 2.2  Internal Reference
      3. 2.3  Starting and Stopping the A-Pool
      4. 2.4  Comparator Function
      5. 2.5  8-Bit DAC Function
      6. 2.6  8-Bit ADC Function
        1. 2.6.1 ADC Conversion Using Ramp
          1. 2.6.1.1 ADC Conversion Without Error Compensation
          2. 2.6.1.2 ADC Conversions With Overdrive Compensation
          3. 2.6.1.3 ADC Conversions With Offset Compensation
          4. 2.6.1.4 ADC Conversions With Overall Compensation
          5. 2.6.1.5 Windowed ADC Conversion
        2. 2.6.2 ADC Conversion Using SAR
        3. 2.6.3 Multiple ADC Conversions
        4. 2.6.4 Comparison Between Different Measurement Methods
        5. 2.6.5 Error Dependencies
      7. 2.7  SVM Function
      8. 2.8  Use of Multiple Features
      9. 2.9  Temperature Measurements With the A-Pool
      10. 2.10 Fractional and Integer Number Use
      11. 2.11 APINTB and APFRACTB Use With ATBU and EOCBU
      12. 2.12 A-Pool Trigger Sources
      13. 2.13 Filtering ADC Conversions With Digital Filters
    4. 3 Summary
    5. 4 References
  2.   Revision History

2.1 Input Dividers

The inputs to the A-Pool can be divided to select the correct voltage range (see Table 1). For measuring the supply voltage, an internal divider is also implemented. The inputs A0 to A4 have programmable dividers included to allow the measurement of a higher voltage range. The A0 and A1 input channel voltage range can be expand to 500-mV input level; the A2 and A3 input channel voltage range can be expand up to 2-V input level.

Table 1. Voltage Range per Channel

Input Channel 250-mV Input Range
AxDIVx = 0		 1-V Input Range
AxDIVx = 1		 2-V Input Range
AxDIVx = 2
A0 ✓ — —
A1 ✓ — —
A2 ✓ ✓ ✓
A3 ✓ ✓ ✓