This application report enables easy migration from MSP430F4xx flash-based MCUs to the MSP430FR58xx/59xx/68xx/69xx family of FRAM-based MCUs. The intent is to highlight key differences between the two families.

Current measurements are used in electronic systems to provide feedback verifying operation is within acceptable margins and to detect potential fault conditions. Analyzing a system’s current level can diagnose unintended or unexpected operating modes allowing for adjustments to be made to improve reliability or to protect the system components from damage.

Power demands of today's modern systems have created the need for sensors to shut down when not in use. Through the strategic placement of TI's FemtoFET product line, significant power savings can be realized for several parts in the TI current sensing product line.

This application report discusses digital filters which are a ubiquitous feature in delta-sigma analog to digital converters (ADCs). Digital low-pass filters are essential to the functionality of a delta-sigma ADC, which relies on oversampling and noise shaping to push quantization noise out of band. There are variations between the types of digital filters used in delta-sigma ADCs that provide various benefits and drawbacks that orient them to different applications. The types of filters and the tradeoffs between them are discussed in this report.

The ability to dynamically control current in an inductive load system is very important for stepper motor designs where different levels of torque control are desired. This adjustment feature can also be used to improve system efficiency by reducing the motor current in low-load situations, achieving a longer battery life.

This application report is provided as a supplement to the data sheet for the DRV8884, DRV8885, DRV8886 and DRV8886AT motor drivers. The goal of this document is to show how to achieve accurate current regulation in normal and low-power modes using different methods. This document also describes different sources of error in these configurations, how to minimize these errors, and the key factors to consider when doing a design.

Operational amplifiers (op amps) with electromagnetic interference (EMI) filters can reduce significant errors. These types of errors are not always obvious to the system designers. They often impact the signal chain, in particular the analog-to-digital converter in the form of a loss of digital counts.