LMH6715QML-SP datasheet(9/18 Pages) TI1

9 / 18 page

LMH6715QML

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SNOSAQ3B – NOVEMBER 2010 – REVISED MAY 2013

APPLICATION SECTION

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 transimpedance 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 (RF). The Electrical

Characteristics and Typical Performance plots specify an RF of 500Ω, a gain of +2V/V and ±5V power supplies

(unless otherwise specified). Generally, lowering RF from it's recommended value will peak the frequency

response and extend the bandwidth while increasing the value of RF will cause the frequency response to roll off

faster. Reducing the value of RF too far below it's recommended value will cause overshoot, ringing and,

eventually, oscillation.

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