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 fre-
quency signals. While offering a small signal bandwidth of
1750MHz, and an ultra high slew rate of 4580V/碌s the
LMH6559 consumes only 10mA of quiescent current. Total
harmonic distortion into a load of 100鈩?at 20MHz is 鈭?2dBc.
The LMH6559 is configured internally for a loop gain of one.
Input resistance is 200k鈩?and output resistance is but 1.2鈩?
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藲 respectively at 3.58MHz make the LMH6559 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 buffer
1750MHz small signal bandwidth
4580V/碌s slew rate
0.06% / 0.02藲 differential gain/phase
鈭?2dBc THD at 20MHz
Single supply operation (3V min.)
75mA output current
Applications
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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
漏 2003 National Semiconductor Corporation
DS200641
www.national.com