Dual op-amp in a through-hole DIP for signal conditioning
The LM1458N/NOPB is a dual general-purpose operational amplifier from Texas Instruments, integrating two independent op-amp circuits in a single 8-pin DIP package. With a 1 MHz gain-bandwidth product and a 0.5 V/µs slew rate, it is suited for audio-frequency signal conditioning, active filtering, and sensor buffering tasks where the signal bandwidth stays below a few hundred kilohertz.
1 MHz GBW and 0.5 V/µs slew rate set the dynamic ceiling
The 1 MHz gain-bandwidth product means the open-loop gain drops to unity at 1 MHz; at a closed-loop gain of 10, the usable bandwidth is roughly 100 kHz. The 0.5 V/µs slew rate limits the large-signal output swing — a 10 V peak-to-peak step slews in about 20 µs, so the amplifier cannot reproduce a full-amplitude 20 kHz sine wave without distortion. Input offset voltage is 1 mV typical, and input bias current is 200 nA typical — adequate for DC-coupled stages with source impedances below 50 kΩ. Each channel draws 3 mA from the supply, keeping the total quiescent current at 6 mA for both amplifiers. The supply span ranges from a minimum of 36 V to a maximum of 36 V — this is a single-value entry in the record, meaning the part is specified for a single-ended or split supply up to ±18 V. Operating temperature is 0°C to 70°C, the commercial grade, so it belongs in benchtop or indoor equipment, not under-hood or outdoor enclosures.
Through-hole DIP-8 for prototyping and legacy board repair
Housed in an 8-DIP (0.300-inch, 7.62 mm) package with a PDIP-8 footprint, the LM1458N/NOPB is a through-hole part that fits breadboards, prototyping sockets, and existing PCB layouts designed for the standard dual op-amp pinout (pins 1–4 for amplifier A, pins 5–8 for amplifier B). The tube packaging (50 units per tube) is the standard through-hole shipping format for hand-insertion or low-volume assembly.