The HA-5004 current feedback amplifier is a video/widebandamplifier optimized for low gain applications. The design isbased on current-mode feedback which allows the amplifierto achieve higher closed loop bandwidth than voltage-modefeedback operational amplifiers. Since feedback isemployed, the HA-5004 can offer better gain accuracy andlower distortion than open loop buffers. Unlike conventionalop amps, the bandwidth and rise time of the HA-5004 arenearly independent of closed loop gain. The 100MHzbandwidth at unity gain reduces to only 65MHz at a gain of10. The HA-5004 may be used in place of a conventional opamp with a significant improvement in speed power product.Several features have been designed in for added value. Athermal overload feature protects the part against excessivejunction temperature by shutting down the output. If thisfeature is not needed, it can be inhibited via a TTL input(TOI). A TTL chip enable/disable (OE) is also provided;when the chip is disabled its output is high impedance.Finally, an open collector output flag (TOL) is provided toindicate the status of the chip. The status flag goes low toindicate when the chip is disabled due to either the internalThermal Overload shutdown or the external disable.In order to maximize bandwidth and output drive capacity,internal current limiting is not provided. However, currentlimiting may be applied via the VC+ and VC- pins whichprovide power separately to the output stage.For Military grade product refer to the HA-5004/883 datasheet.
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