LMH6559_06 Datasheet, PDF (1/22 Pages) National Semiconductor (TI) – High-Speed, Closed-Loop Buffer

July 2006
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 fre-
quency 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 Closed-loop buffer
n 1750MHz small signal bandwidth
n 4580V/µs slew rate
n 0.06% / 0.02˚ differential gain/phase
n −52dBc THD at 20MHz
n Single supply operation (3V min.)
n 75mA output current
Applications
n Video switching and routing
n Test point drivers
n High frequency active filters
n Wideband DC clamping buffers
n High-speed peak detector circuits
n Transmission systems
n Telecommunications
n Test equipment and instrumentation
Typical Schematic
© 2006 National Semiconductor Corporation DS200641
20064133
www.national.com