Noise and EMI can be detrimental to sensitive analog signal chain circuitry. For this reason, many engineers automatically default to linear regulators. But, in doing so, they are essentially trading one problem (noise) for another (heat dissipation). In this section we will discuss what types of signal chain loads can be driven directly by a switching regulator to get low noise and EMI without sacrificing efficiency. We will also discuss when a linear regulator is absolutely needed to reach levels of noise not possible with a switcher.
Mitigating switching regulator EMI and noise is seen by engineers as a black art. Mess with the feng shui of the PCB layout too much, and the system may not pass CISPR standards. Because of this, many power designers simply turn to linear regulators as a guaranteed way to avoid the headache of reducing emissions.
This series explores advanced topics related to the JESD204B SerDes standard associated with extending the link length and multi-device synchronization.
TI's battery experts have decades of experience. Our battery scientists bring cutting-edge solutions for new battery chemistries & technologies, from charging, gauging, monitoring, protection and more. This technical training was especially developed for design engineers working with power supply for battery-powered systems. Additional resources and design tools are provided for each training to complete your training experience.
Learn how C2000 devices excel in Sensing & DSP Processing Applications.
Before we dive into specific application-based examples of noise and EMI mitigation, let's start with the basics. What is noise? What is EMI? What is ripple? How are they measured? What are some common approaches to limiting their effects? This section discusses these topics with a more conceptual approach to serve as a primer for the rest of the series.
Delta-sigma analog-to-digital converters (ADCs) are oversampling converters typically used in applications requiring higher resolution. However, ADCs do not work by themselves. In fact, they require several key components around them, including a front-end amplifier, a voltage reference, a clock source, power supplies, and a good layout. Many devices integrate these features together with the ADC to offer a complete system solution, which simplifies the design for customers and minimizes board space.
Now that we understand the sources of EMI and noise in switching regulators, and some of the common approaches to mitigating each, let's take a closer look at real-world examples of reducing their effects. In this section we will examine the impacts of various mitigation techniques to help you decide which approach makes the most sense in your design. Techniques covered in this discussion include external component placement, filter options and design, frequency manipulation via spread spectrum or dithering, snubbers, boot resistors, and more.
Experiment with Innovative Sensing Techniques Using DLP® Technology to Determine Material Properties
This DLP® training series provides an innovative applications introduction for spectroscopy. The series includes the following key content:
- Spectroscopy Agenda
- Introduction to DLP technology
- Overview of near-infrared (NIR) spectroscopy & DLP spectroscopy architecture
- Spectroscopy development tools using DLP technology
- Target application overview in spectroscopy
- Scanning process for DLP spectroscopy
- Developing your own spectrometer
- Additional DLP spectroscopy resources
This series covers general updates on Texas Instruments' high-speed signal chain portfolio.
The Getting Started with Current Sense Amplifiers series helps engineers learn how to maximize the performance achieved when measuring current with a current sense amplifier (also called a current shunt monitor).
This is a series of short videos, each addressing a different topic. While intended as a series to be viewed in order, each session is stand-alone and can be viewed without the need to watch it all if there is a specific topic you are interested in learning more about.
Section 3 of this training series introduces three advanced topics related to current measurement with current sense amplifiers.