6

Equivalent Circuit

Burn-In Circuit

Applications Information

Product Description

The EL2075 is a wideband monolithic operational amplifier

built on a high-speed complementary bipolar process. The

EL2075 uses a classical voltage-feedback topology which

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

noise gain

≥ 10 where current-feedback amplifiers are not

appropriate because of restrictions placed upon the

feedback element used with the amplifier. The conventional

topology of the EL2075 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

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

the feedback network, the EL2075 is an excellent choice for

applications such as log amplifiers.

The EL2075 also has excellent DC specifications: 200µV,

specifications allow the EL2075 to be used in DC-sensitive

applications such as difference amplifiers. Furthermore, the

current noise of the EL2075 is only 3.2pA/

√Hz, making it an

excellent choice for high-sensitivity transimpedance amplifier

configurations.

Gain-Bandwidth Product

The EL2075 has a gain-bandwidth product of 2GHz. For

gains greater than 40, 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 40,

higher-order poles in the amplifier's transfer function

contribute to even higher closed loop bandwidths. For

example, the EL2075 has a -3dB bandwidth of 400MHz at a

gain of +10, dropping to 200MHz at a gain of +20. It is

important to note that the EL2075 has been designed so that

this “extra” bandwidth in low-gain applications does not

come at the expense of stability. As seen in the typical

performance curves, the EL2075 in a gain of +10 only

exhibits 1.5dB of peaking with a 100

Ω load.

All Packages Use The Same Schematic

EL2075