Are they worth the bother? For me with my advanced age, dodgy eyesight and unsteady hand, trying to mark out something that small on a PCB to be etched is a major PITA and a serious investment in effort and swearing. And I'm only using stone age size components, too: thru-hole, 8-pin, DIL packages. Do I *really* need to? The datasheet recommends it but I've always managed before without any.
THanks, that'll save me a huge amount of swearing. Now, these DILs have two op amps per package. Since I probably won't be able to screw enough gain out of just using one of them, how do you feel about using both in series to end up with ~0.5V p-p audio signal out of the 2nd one? Will there be a problem with cross-talk?
It would if Cursitor Doom did it. You do have to very careful to deal with all the possible feedback paths. At those frequencies there isn't a lot of power supply rejection, so you have to decouple the power rails very carefully, otherwise the current drawn from the power rail by output device will feedback into the input stage of the input device though it's power supply pins, with enough gain and phase shift to guarantee oscillation.
But if you are careful you can do it, and get there by design. I've done it.
They aren't enough, on their own. A ground plane underneath the parts can be helpful, if you do it right, but you do have to kill feedback through the power rails too.
Cursitor Doom may aspire to be a wanker, but he probably couldn't even get that to work.
Many years ago. Not that I've ever used the 5532. The proposition that you could cascade both halves of one 5532 is obvious nonsense, since you are stuck with one pair of power supply pins for both devices and the devices don't have the power supply rejection ratio at high frequencies to let it work. Cascading two 5532 amplifiers from two different packages could work if you decoupled the power rails carefully enough - but that does mean that you have to undertstand what the data sheet is telling you.
Low equivalent series resistance by-pass capacitors close to the power supply pins probably wouldn't hack it. Separate capacitors for each device, and ferrite beads to minimise any high frequency current fed back into the power rail would be closer to what it takes, and the 5532 layout suggestions don't go quite that far.
They do have to be read by somebody who understands what they are saying, and you don't seem to be able to do that.
Neither the ONSemi nor the TI, nor the original Philips datasheets includes a graph of power supply rejection ratio against frequency. A professional device, such as the Linear Technology LT1028 does, but the audio market doesn't get that kind of service. The audio amplifiers don't perform any better.