LMH6559

LMH6559 High-Speed, Closed-Loop Buffer April 2003 LMH6559 High-Speed, Closed-Loop Buffer General Description The LMH6559 is a high-speed, closed-loop buffer designed for applications requiring the processing of very high frequency signals. While offering a small signal bandwidth of 1750MHz, and an ultra high slew rate of 4580V/µs the LMH6559 consumes only 10mA of quiescent current. Total harmonic distortion into a load of 100Ω at 20MHz is −52dBc. The LMH6559 is configured internally for a loop gain of one. Input resistance is 200kΩ and output resistance is but 1.2Ω. These characteristics make the LMH6559 an ideal choice for the distribution of high frequency signals on printed circuit boards. Differential gain and phase specifications of 0.06% and 0.02˚ respectively at 3.58MHz make the LMH6559 well suited for the buffering of video signals. The device is fabricated on National’s high-speed VIP10 process using National’s proven high performance circuit architectures. Features n n n n n n n Closed-loop buffer 1750MHz small signal bandwidth 4580V/µs slew rate 0.06% / 0.02˚ differential gain/phase −52dBc THD at 20MHz Single supply operation (3V min.) 75mA output current Applications n n n n n n n n Video switching and routing Test point drivers High frequency active filters Wideband DC clamping buffers High-speed peak detector circuits Transmission systems Telecommunications Test equipment and instrumentation Typical Schematic 20064133 © 2003 National Semiconductor Corpora...