The SPT220 is a wide bandwidth DC-coupled operational amplifier that defines the state-of-the-art in high speed op amps. A 3dB bandwidth of DC to 190MHz is achieved using a current feedback architecture design. Ultra-fast settling time (8nsec to 0.1%) and slew rate (7000V/sec) make the SPT220 a superior amplifier for pulsed and digital applications. Since thermal tail has been eliminated, the SPT220 settles fast and remains solidly at the desired level. Flat gain and linear phase (1.2 deviation from linear) from DC to beyond 100MHz help the SPT220 to achieve distortion levels uncommonly low relative to conventional op amps. Using the SPT220 is as easy as adding power supplies and a gain-setting resistor. The result is reliable, consistent performance because such characteristics as bandwidth and settling time are virtually independent of gain setting. Unlike conventional op amp designs where the optimum gain-bandwidth product occurs at a high gain, minimum settling time at a gain of -1, maximum slew rate at a gain of +1, et cetera, the SPT220 offers predictable response at gain settings from 1 to 50. This, coupled with consistent performance from unit to unit with no external compensation, makes the SPT220 a real time and costsaver in design and production situations alike. This combination of features makes the SPT220 appropriate for a broad range of applications. The wide bandwidth, DC coupling, and fast settling lend themselves well to high speed D to A and "flash" A to D applications. Both receivers and transmitters in optical fiber systems have similar requirements. High gain and phase linearity and corresponding low distortion make the SPT220 ideal for many digital communication system applications, such as in the demodulator, where the need for both DC coupling and high frequency amplification creates requirements that are difficult to meet.