LT1886: Low Distortion Line Driver


Posted on Jun 16, 2012

The LT1886 is a high speed dual power amplifier with excellent high frequency distortion performance. The LT1886 features a 700MHz gain-bandwidth product, 200V/ms slew rate and over 200mA of output current drive in a small SO-8 package. Using only a single 12V supply, the LT1886 is the best choice for the line driver in ADSL CPE modems (customer premises equipment).



Figure 1 illustrates a differential line driver with an LT1886 driving a 1:2 turns ratio isolation/coupling transformer. Here it can be seen that both the 2nd and 3rd harmonic components of a 200kHz tone, even with a closed-loop gain of 10, are well b




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