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MSP430F5244: MSP430F5244 VS MSP430F5234

Part Number: MSP430F5244
Other Parts Discussed in Thread: MSP430F5234

We are selecting A MSP430 as our IOT microcontroller.

And we now have two options, one is MSP430F5244, another is MSP430F5234.

  

We can see that the main difference of these two IC is the ADC type. The ADC type of  MSP430F5244 is SAR and MSP430F5234 is  Slope.

(1) Do these two types of ADC have demands of  the signal we measure, for example, the max frequency of signal?

(2) And I have a glance at the datasheets of two IC, it seems that the current of ADC consumes are almost the same.Anyd other factors should I consider for my design?

Because we have to consider the cost, we tend to select MSP430F5234, but I am now worried about the difference of ADCs.

May you help me?

Thanks!

 

 

  • Hello,

    That is a great question! I can see how the product selection window can be a tad misleading, but the reason that the MSP430F5234 is a little cheaper than the MSP430F5244 is because there in fact is not a dedicated ADC peripheral on-board the F5234. The reference to "slope" in the ADC column is referring to a way to emulate an ADC using the on-board Comparator and DAC.

    If you'd like additional information on what this is and how it works, please refer to the Single-Slope Analog-to-Digital Conversion Technique Using MSP430™ MCUs Tech Note.

    If you need a dedicated ADC peripheral for your design then your best best between those two devices would be to go with the F5244.

    Best regards,

    Matt

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