A Google search for the term “analog to digital converter selection” produces thousands of hits, proof that this task continues to challenge a number of us involved in designing that elusive, perfect sensing solution. After all, there are a vast number of analog-to-digital converter (ADC) solutions out there, from simple 10-bit ADCs integrated in 8-bit microcontrollers (MCUs) to ADCs that can resolve at GHz rates.
Unless you are designing a specialized sensing front end, chances are you are looking for an integrated ADC capable of high-quality performance without compromising on energy savings or operational flexibility. In this post, I’ve outlined a few parameters that can help you narrow your search for ADCs, although you may have additional parameters depending on your application’s specific needs.
As an example, an ADC sampling at 1MSPS will collect 1,000 16-bit samples in 1ms. If you used a double-buffered approach to capture the ADC samples, then you know that you have ≤1ms to post-process the data buffer, take actions based on the results and possibly move the data before the next data set is ready for processing.
As I mentioned at the beginning of this post, your actual list of ADC selection criteria may be much longer depending on what the application is trying to sense. You can evaluate the MSP432P4’s high-performance ADC with up to 16-bit precision by purchasing the MSP432P4 LaunchPad™ development kit and by taking a quick online tutorial on utilizing the precision ADC through our SimpleLink Academy training portal.
If you’d like to delve deeper into the topic of ADC selection and see how TI’s MSP432P4 high-precision ADC stacks up next to available ADCs on the market, take a look at the chart in Figure 1 below and check out our application report with useful hints on demystifying ADC data-sheet parameters.
Figure 1: Performance of MSP432 16-bit Precision ADC compared to competition
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