April 2003
LMH6560
Quad, High-Speed, Closed-Loop Buffer
General Description
Features
n Closed-loop quad buffer
n 680MHz small signal bandwidth
n 3100V/µs slew rate
The LMH6560 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
680MHz, and a very high slew rate of 3100V/µs the
LMH6560 consumes only 46mA of quiescent current for all
four buffers. Total harmonic distortion into a load of 100Ω at
20MHz is −51dBc. The LMH6560 is configured internally for
a loop gain of one. Input resistance is 100kΩ and output
resistance is but 1.5Ω. Crosstalk between the buffers is only
−55dB. These characteristics make the LMH6560 an ideal
choice for the distribution of high frequency signals on
printed circuit boards. Differential gain and phase specifica-
tions of 0.10% and 0.03˚ respectively at 3.58MHz make the
LMH6560 well suited for the buffering of video signals.
n 0.10% / 0.03˚ differential gain / phase
n −51dBc THD at 20MHz
n Single supply operation (3V min.)
n 80mA output current
Applications
n Multi-channel video distribution
n Video switching and routing
n High-speed analog multiplexing
n Channelized EW
The device is fabricated on National’s high speed VIP10
process using National’s proven high performance circuit
architectures.
n High-density buffering
n Active filters
n Broadcast and high definition TV systems
n Medical imaging
n Test equipment and instrumentation
Typical Schematic
20064235
© 2003 National Semiconductor Corporation
DS200642
www.national.com