The LM6171 is a high-speed, unity-gain-stable voltage-feedback amplifier. The device consumes only 2.5 mA of supply current while providing a gain-bandwidth product of 100 MHz and a slew rate of 3600 V/μs. The LM6171 has additional features, such as low differential gain and phase, and high output current. The LM6171 is a great choice in high-speed circuits.

The LM6171 is a true voltage-feedback amplifier. Unlike current-feedback amplifiers (CFAs) with a low inverting input impedance and a high noninverting input impedance, both inputs of voltage-feedback amplifiers (VFAs) have high-impedance nodes. The low-impedance inverting input in CFAs couples with a feedback capacitor and causes oscillation. As a result, CFAs cannot be used in traditional op-amp circuits, such as photodiode amplifiers, I-to-V converters, and integrators.