High-speed op-amp in a through-hole DIP
The LT1221CN8#PBF is a single-channel, general-purpose high-speed operational amplifier from the C-Load™ series, designed for applications that need fast settling and wide bandwidth. It delivers a 250 V/µs slew rate and 150 MHz gain-bandwidth product, making it suitable for video amplification, pulse shaping, and high-speed data acquisition front-ends. The 8-DIP (0.300", 7.62 mm) through-hole package and 8-PDIP supplier package suit socketed prototyping, breadboard work, and legacy board repairs.
Package and mounting
A 250 V/µs slew rate means this op-amp can swing a 10 V step in about 40 ns, which is fast enough for composite video (NTSC/PAL) and high-frequency signal conditioning without slew-rate limiting. The 150 MHz gain-bandwidth product supports closed-loop gains of 10 or more while maintaining a 15 MHz small-signal bandwidth — enough for many RF and IF stages. The C-Load™ designation indicates the output stage is compensated to drive capacitive loads without oscillation, a common headache when cabling to an ADC input or a long trace.
The 10 V minimum supply span lets you run this from a single 12 V rail, while the 30 V maximum covers ±15 V supplies. Quiescent supply current is 8 mA per amplifier, reasonable for a high-speed part. Input bias current is 100 nA (bipolar input stage), and input offset voltage is 200 µV typical, which is adequate for AC-coupled or moderate-precision DC paths.
Temperature grade and storage
It belongs in indoor test equipment, lab instruments, and benchtop gear — not in an engine bay or outdoor enclosure without climate control. The PDIP package is MSL 1 (moisture sensitivity level 1), so no bake is needed before reflow or hand-soldering, even if the bag has been open. Store the reels in a dry environment below 40°C.
Lifecycle and sourcing
The through-hole DIP package is a mature form factor, but Analog Devices continues to support it. For volume production or dual-source risk management, the AD827JNZ is a two-channel alternative in the same 8-DIP footprint with a 300 V/µs slew rate and 50 MHz gain-bandwidth — though it is a dual amplifier, not a single. The AD847JRZ-REEL7 is a surface-mount single with similar speed but in SOIC-8. Neither is a drop-in replacement; verify the pinout and compensation before substituting.