1 Best in Class Radiated Emissions EMI Performance with Isolated Amplifiers

Several industrial and automotive applications require some type of isolation to protect the digital circuitry from the high-voltage circuit performing a function. Texas Instruments has an extensive portfolio of isolated amplifiers and data converters featuring a capacitive isolation barrier to help customers address their isolated data conversion needs. Texas Instruments’ capacitive isolation barrier allows for exceptional reliability, often over 100 years of operation. For more information on TI's capacitive isolation barrier, please review the Isolation website.

Radiated emissions testing is common in these applications to verify the system does not produce radiated emissions that exceed the defined levels which may negatively impact other components or circuits in the system. Please see this Understanding electromagnetic compliance tests in digital isolators marketing white paper for a more in-depth description of EMI. The magnitude of acceptable radiation and testing procedure for radiated emissions is put in place by the Comité International Spécial des Perturbations Radio, also known as CISPR. Industrial applications measure according to the CISPR 11 standard, while automotive applications measure to the CISPR 25 standard. For more information on the CISPR standards and their respective magnitudes over frequency, please see this An overview of conducted EMI specifications for power supplies marketing white paper.

This document shows the radiated emissions electromagnetic interference (EMI) performance for Texas Instruments' isolated amplifiers, including the AMC1300B-Q1, AMC1300, AMC1302, and AMC1311 as well as radiated emissions performance for previous isolated amplifier generations.

For radiated emissions EMI guidance for the AMC3301 family, please see this Best Practices to Attenuate AMC3301 Family Radiated Emissions EMI application note.