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Exploring TIC digital interface

Posted: 10 Feb 2014  Print Version  Bookmark and Share

Keywords:Interfaces  TIC  protocol  transistor  amplifier 

Interfaces for the TIC protocol are mainly based on analog circuits, containing transistor, amplifier, and comparator stages. They require effort in analog engineering, and the reliability suffers from tolerances, shifting, and aging analog components.

This application report presents a TIC Digital Interface, which considers an early analog-to-digital conversion with the help of a ΔΣ-modulator AMC1204 device and, for data processing, a MSP430 microcontroller. Out of the analog TIC signal, the AMC1204 device generates a bit stream, which is used as clock input for a MSP430 timer module. A transmitted logical "1" leads to a slow-counting frequency, whereas a "0" leads to a fast-counting frequency. The sampled data is forwarded to the application with a distinction between cases and a synchronization clock of the MSP430.

Due to its simple design and the internal isolation of the AMC1204 device, the TIC Digital Interface does not require a transformer in the signal path, unlike analog solutions, which require a transformer.

View the PDF document for more information.

Originally published by Texas Instruments at www.ti.com as "TIC Digital Interface".





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