7.1 Overview

The AMC1100 consists of a delta-sigma modulator input stage including an internal reference and clock generator. The output of the modulator and clock signal are differentially transmitted over the integrated capacitive isolation barrier that separates the high- and low-voltage domains. The received bitstream and clock signals are synchronized and processed by a third-order analog filter with a nominal gain of 8 on the low-side and presented as a differential output of the device, as shown in the Functional Block Diagram section.

The SiO₂-based capacitive isolation barrier supports a high level of magnetic field immunity, as described in application report SLLA181, ISO72x Digital Isolator Magnetic-Field Immunity (available for download at www.ti.com).