SLAAE93 February   2023 MSPM0C1105 , MSPM0C1106 , MSPM0G1105 , MSPM0G1106 , MSPM0G1107 , MSPM0G1505 , MSPM0G1506 , MSPM0G1507 , MSPM0G1518 , MSPM0G1519 , MSPM0G3105 , MSPM0G3106 , MSPM0G3106-Q1 , MSPM0G3107 , MSPM0G3107-Q1 , MSPM0G3505 , MSPM0G3506 , MSPM0G3506-Q1 , MSPM0G3507 , MSPM0G3507-Q1 , MSPM0G3518 , MSPM0G3518-Q1 , MSPM0G3519 , MSPM0G3519-Q1 , MSPM0H3216 , MSPM0L1105 , MSPM0L1106 , MSPM0L1227 , MSPM0L1227-Q1 , MSPM0L1228 , MSPM0L1228-Q1 , MSPM0L1303 , MSPM0L1304 , MSPM0L1304-Q1 , MSPM0L1305 , MSPM0L1305-Q1 , MSPM0L1306 , MSPM0L1306-Q1 , MSPM0L1343 , MSPM0L1344 , MSPM0L1345 , MSPM0L1346 , MSPM0L2227 , MSPM0L2227-Q1 , MSPM0L2228 , MSPM0L2228-Q1

 

  1.   Trademarks
  2. 1MSPM0 Family Overview
  3. 2MSPM0 Main Analog Features
    1. 2.1 Best-in-Class 12-Bit ADC Integrated
    2. 2.2 Dual Mode Comparator With Reference DAC
    3. 2.3 Buffered 12-Bit 1-Msps DAC
    4. 2.4 Zero-Drift and Zero-Crossover Chopper OPA
  4. 3Easily and Flexibly Create the System With MSPM0 Analog Peripherals
    1. 3.1 ADC Sample and Conversion
    2. 3.2 Differential and Cascade OPA Configurations
    3. 3.3 Window Comparator Mode
    4. 3.4 Internal Connections Between Different Analog Peripherals
  5. 4Analog Comparison With STM32
  6. 5References

3.4 Internal Connections Between Different Analog Peripherals

Software can configure the internal analog connections in MSPM0 devices. The following examples show the internal paths inside MSPM0 devices to easily and flexibly create analog features for different use cases.

  1. Route the OPA to the ADC and COMP to amplify the input signal (see #FIG_N4S_BMP_VVB).
    GUID-20221214-SS0I-FCGP-XZ5C-X9KKNFTRM4DN-low.png Figure 3-5 OPA Connection to ADC and Comparator

    OPA chopping mode can significantly improve the offset voltage and drift performance. When OPA connecting to ADC, if chopping mode is needed, besides standard chopping within OPA, there is ADC Assisted chopping mode can be supported.

  2. Route the 8-bit DAC of the COMP or the 12-bit DAC to the OPA as bias generation.

    Some MSPM0G devices support the 12-bit DAC as a stand-alone peripheral in the device. This DAC can be directly connection to the OPA input to generate the bias voltage (see #FIG_YWZ_YMP_VVB).

    Figure 3-6 12-bit DAC Connection to OPA

    Not only the 12-bit DAC is able to generate the bias voltage. The 8-bit DAC in the comparator also has the connection to OPA (see #FIG_BLF_2NP_VVB).

    Figure 3-7 Comparator 8-bit DAC Connection to OPA
  3. Connect the GPAMP output to the ADC and OPA to amplify the input signal.

    Direct connections from the GPAMP to other analog peripherals, like the OPA, are supported. When connecting to ADC, the standard and ADC assisted chopping modes are also supported in the GPAMP (see #FIG_FZS_JNP_VVB).

    GUID-20221214-SS0I-SJ5H-WTC5-NJPL7HC50RWJ-low.png Figure 3-8 GPAMP Connection to ADC and OPA