Hi,
I'm working on a compact SMD based PCB/build for Doug Self's EQ from LinearAudio#5.
It seems like LM4562 in SOIC-8 package is rather unobtainable at the moment so I'm thinking about suitable alternatives.
One guess that one choice that comes to mind is OPA1612. It should be of simmilar if not better overall quality except for the fact that it does not like loads below 2k where the LM4562 deals fine with loads down to 600R. Looking at the circuit, I don't think that is going to be an issue. I think the lowest load that one of the devices sees is A4b's output that sees 910R (R26)+ 5k (HF pot RV4) to ground. Should be no problem for the OPA1612. I may be overlooking something so it would be great if someone could offer a second opinion.
I'd also be interested in other alternatives. The OPA1612 isn't cheap and the circuit requires 13 of these guys so using ~$8 devices instead of ~$2 devices is a bit anoying...
Cheers!
Lars
I'm working on a compact SMD based PCB/build for Doug Self's EQ from LinearAudio#5.
It seems like LM4562 in SOIC-8 package is rather unobtainable at the moment so I'm thinking about suitable alternatives.
One guess that one choice that comes to mind is OPA1612. It should be of simmilar if not better overall quality except for the fact that it does not like loads below 2k where the LM4562 deals fine with loads down to 600R. Looking at the circuit, I don't think that is going to be an issue. I think the lowest load that one of the devices sees is A4b's output that sees 910R (R26)+ 5k (HF pot RV4) to ground. Should be no problem for the OPA1612. I may be overlooking something so it would be great if someone could offer a second opinion.
I'd also be interested in other alternatives. The OPA1612 isn't cheap and the circuit requires 13 of these guys so using ~$8 devices instead of ~$2 devices is a bit anoying...
Cheers!
Lars
Cool, that’s great information. Thank you… TI‘s inventory display is a bit on the optimistic side though until you get to checkout…
The LME49860 is the exact same part as the LME49720, just binned for higher voltage. I see they're available to order, but cost $3.511 vs $2.133.
The OPA1656 seems to be available and is also a suitable, low distortion, high output drive amplifier. Mouser and Digikey have stock now, only in tubes (not tape and reel).