This document introduces an ADSL line interface driver based on TS613, which can be powered by a single supply and has passive or active impedance matching.
The document details how to use the TS613 chip as a dual-line driver for upstream signals in ADSL remote terminals. It specifically addresses implementations using a +12V single power supply, which is common in PCI connector applications.
Two methods for line interface design are covered: passive impedance matching and active impedance matching. The text provides circuit diagrams, component calculation formulas, and tables of calculated values to help designers achieve the required signal amplitude on the telephone line.
| Maximum output amplitude (differential) | 18V peak to peak |
|---|---|
| Dynamic line impedance | 100 Ohms |
| Maximum upstream frequency (ADSL over POTS) | 135kHz |
| Maximum upstream frequency (ADSL over ISDN) | 276kHz |
| Power consumption (emission on 900m line) | 360mW |
The driver should be implemented with a +12 volts single power supply.
The driver is biased with a mid supply of nominal +6V.
A 1:2 transformer ratio is used.