7

Equivalent Circuit

Burn-In Circuit

Applications Information

Product Description

The EL2074 is a wideband monolithic operational amplifier

built on a high-speed complementary bipolar process. The

EL2074 uses a classical voltage-feedback topology which

allows it to be used in a variety of applications requiring a

noise gain

≥ 2 where current-feedback amplifiers are not

appropriate because of restrictions placed upon the feed-

back element used with the amplifier. The conventional

topology of the EL2074 allows, for example, a capacitor to be

placed in the feedback path, making it an excellent choice for

applications such as active filters, sample-and-holds, or inte-

grators. Similarly, because of the ability to use diodes in the

feedback network, the EL2074 is an excellent choice for

applications such as log amplifiers.

The EL2074 also has excellent DC specifications: 200µV,

cations allow the EL2074 to be used in DC-sensitive

applications such as difference amplifiers. Furthermore, the

current noise of the EL2074 is only 3.2pA/

√Hz, making it an

excellent choice for high-sensitivity transimpedance amplifier

configurations.

Gain-Bandwidth Product

The EL2074 has a gain-bandwidth product of 400MHz. For

gains greater than 8, its closed-loop -3dB bandwidth is

approximately equal to the gain-bandwidth product divided

by the noise gain of the circuit. For gains less than 8, higher-

order poles in the amplifier's transfer function contribute to

even higher closed loop bandwidths. For example, the

EL2074 has a -3dB bandwidth of 400MHz at a gain of +2,

dropping to 200MHz at a gain of +4. It is important to note

that the EL2074 has been designed so that this “extra” band-

width in low-gain applications does not come at the expense

of stability. As seen in the typical performance curves, the

EL2074 in a gain of +2 only exhibits 1dB of peaking with a

100

Ω load.

All Packages Use The Same Schematic

EL2074