The LM741 is an operational amplifier IC made by National Semiconductor (now Texas Instruments). The LM prefix is rumored to stand for “linear monolithic”. At any rate it’s a prefix for many analog integrated circuits from National Semiconductor.
The 741 part is just an arbitrary number. There is some structure to the LM-series numbering scheme—in particular, many parts come in LM1xx, LM2xx, and LM3xx versions, where the first digit indicates the rated operating temperature range—but the 741 doesn’t fit into this pattern. Other LM700 series ICs (LM709 and LM748) are also op amps.
The LM356 is an audio power amplifier with a 300 KHz bandwidth. The LM741 is an operational amplifier with a typical unity gain bandwidth of 1 MHz.
They are entirely different sorts of things and not at interchangeable.
Neither is very good at higher frequencies.
The LF356, which is a JFET input operational amplifier with a unity gain bandwidth around 5 MHz. Much better part in almost every dimension than the LM741.
Two commonly used opamp are LM741 & LM358. Difference between LM358 & LM741 is, LM358 is newer and have two OP-AMP on chip while in 741 only one OP-AMP is present. Both the IC’s have 8 pins.
LF356 has a GBW of 5MHz and LM741 has a GBW of 1MHz.
So In this aspect is the LF356 better.
BUT they are both very old designs, and if do no need the high operating voltage range, use a more modern OP-AMP…
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