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

4 Analog Comparison With STM32

The MSPM0 and STM32 are not identical devices in terms of features or pin count, however the device are similar and target similar applications. #GUID-756282F3-D6D0-4D91-80AD-06EB2B5164FF/TABLE_G1V_5LV_HWB lists the details of analog feature comparison between MSPM0 and STM32F0/G0/C0. There is no OPA support in STM32F0/G0/C0, and both MSPM0L and MSPM0G offer two zero-drift zero-crossover and rail-to-rail op-amps.

Table 4-1 MSPM0 vs STM32 Analog Features
Features MSPM0G MSPM0L STM32F0 STM32G0 STM32C0
CPU Cortex M0+ 80 MHz Cortex M0+ 32 MHz Cortex-M0 48 MHz Cortex M0+ 64 MHz Cortex M0+ 48 MHz
VDDA 1.62 V to 3.6 V 1.62 V to 3.6 V 2.4 V to 3.6 V 1.62 V to 3.6 V 2 V to 3.6 V
ADC Channel and sampling rate 16 channels 12-bit 4 Msps 10 channels 12-bit 1.45 Msps 16 channels 12-bit 1 Msps 16 channels 12 bit 2.5 Msps
ENOB 11.2-bit 11.2-bit Not provided 10.2 bit
SNR (Vref = VDD) 70 dB 70 dB Not provided 64 dB
INL ±2 LSB ±2 LSB ±1.7 LSB ±1.5 LSB
DNL ±1 LSB ±1 LSB ±1.3 LSB ±3 LSB
Comparator Input hysteresis 0.4, 10, 20, 30 mV 0.4, 10, 20, 30 mV 0, 8, 15, 31 mV 0, 10, 20, 30 mV Not supported
Propagation delay 49 ns 49 ns 240 ns 50 ns
Startup time 1.2μs 1.2μs 60 μs 15 μs
Integrated DAC 8-bit DAC 8-bit DAC Not supported Not supported
DAC Data rate 12 bit 1 Msps Not supported 1 Msps 12-bit Not supported
ENOB 11 bit Not provided 11.5 bit
SNR 70 dB Not provided 71.6 dB
INL ±4 LSB ±4 LSB ±4 LSB
DNL ±1LSB ±2LSB ±2LSB

OPA

VCM

-0.1 V to (VDD – 0.3 V)

 Not supported

GBW

6 MHz

Slew rate

4 V/μs

THDN

0.005%

For the performance of analog features, the noise is an unwanted signal, as it interferes with the original message signal and corrupts the parameters of the signal. For example, ADC noise errors strongly impact the ENOB (effective number of bits). MSPM0 devices provide 70-dB SNR (signal-to-noise ratio) so ENOB can reach 11.2-bit with the 12-bit SAR ADC.