LMH6560 Quad, High-Speed, Closed-Loop Buffer
April 2003
LMH6560
Quad, High-Speed, Closed-Loop Buffer
General Description
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/碌s the
LMH6560 consumes only 46mA of quiescent current for all
four buffers. Total harmonic distortion into a load of 100鈩?at
20MHz is 鈭?1dBc. The LMH6560 is configured internally for
a loop gain of one. Input resistance is 100k鈩?and output
resistance is but 1.5鈩? Crosstalk between the buffers is only
鈭?5dB. 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藲 respectively at 3.58MHz make the
LMH6560 well suited for the buffering of video signals.
The device is fabricated on National鈥檚 high speed VIP10
process using National鈥檚 proven high performance circuit
architectures.
Features
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Closed-loop quad buffer
680MHz small signal bandwidth
3100V/碌s slew rate
0.10% / 0.03藲 differential gain / phase
鈭?1dBc THD at 20MHz
Single supply operation (3V min.)
80mA output current
Applications
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Multi-channel video distribution
Video switching and routing
High-speed analog multiplexing
Channelized EW
High-density buffering
Active filters
Broadcast and high definition TV systems
Medical imaging
Test equipment and instrumentation
Typical Schematic
20064235
漏 2003 National Semiconductor Corporation
DS200642
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