LMH6715_16 Datasheet, PDF (9/21 Pages) Texas Instruments – Dual Wideband Video Op Amp

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APPLICATION SECTION
LMH6715
SNOSA10C – MAY 2002 – REVISED APRIL 2013
Figure 27. Non-Inverting Configuration with Power Supply Bypassing
Figure 28. Inverting Configuration with Power Supply Bypassing
Application Introduction
Offered in an 8-pin package for reduced space and cost, the wideband LMH6715 dual current-feedback op amp
provides closely matched DC and AC electrical performance characteristics making the part an ideal choice for
wideband signal processing. Applications such as broadcast quality video systems, IQ amplifiers, filter blocks,
high speed peak detectors, integrators and transimedance amplifiers will all find superior performance in the
LMH6715 dual op amp.
FEEDBACK RESISTOR SELECTION
One of the key benefits of a current feedback operational amplifier is the ability to maintain optimum frequency
response independent of gain by using appropriate values for the feedback resistor (R_F). The Electrical
Characteristics and Typical Performance plots specify an R_F of 500Ω, a gain of +2V/V and ±5V power supplies
(unless otherwise specified). Generally, lowering R_F from it's recommended value will peak the frequency
response and extend the bandwidth while increasing the value of R_F will cause the frequency response to roll off
faster. Reducing the value of R_F too far below it's recommended value will cause overshoot, ringing and,
eventually, oscillation.
Copyright © 2002–2013, Texas Instruments Incorporated
Product Folder Links: LMH6715
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