The LT1251CN#PBF from Linear Technology is a single-channel current-feedback operational amplifier designed for high-speed analog signal processing. Its 40 MHz -3 dB bandwidth and 300 V/µs slew rate suit it for video distribution, pulse amplification, and wideband instrumentation front-ends where settling time and slew-induced distortion matter. The current-feedback topology keeps the gain-bandwidth product largely independent of closed-loop gain, so you get consistent bandwidth across gain settings — a practical advantage over voltage-feedback parts when the gain stage needs to be reconfigured without swapping the amplifier.
Each channel delivers 40 mA of output current, enough to drive a 75 Ω video load or a moderate capacitive load like a coaxial cable or an ADC input buffer. The 14.5 mA quiescent supply current is moderate for a 40 MHz amplifier — budget about 72 mW per channel at ±5 V, rising to about 435 mW at ±15 V, so the through-hole DIP package's thermal impedance needs a small airflow or a socket with good convection if running near the top of the supply range continuously.
Package and mounting — through-hole for prototyping and legacy support
This package is a natural fit for breadboard prototyping, socketed evaluation, and rework in existing designs that use DIP footprints. The through-hole format also simplifies manual assembly and field replacement — a practical advantage when the amplifier sits in a test fixture or a low-volume production board where surface-mount reflow isn't justified. The supplier device package is 14-PDIP, which is the standard 0.300" wide DIP outline.