Hi everyone 🙂 What is the cheap but better substitute of tl07x/tl08x series op-amps in PDIP package? The only option i see is old lf353 from national semiconductor
(now ti) but i'm not sure about its superiority over tl0xx series(subjectively & objectively). I know opa2134 is better but costs about 5x compared to tl0xx series opamp.
(now ti) but i'm not sure about its superiority over tl0xx series(subjectively & objectively). I know opa2134 is better but costs about 5x compared to tl0xx series opamp.
If you're up for using an adapter there's an affordable choice in the OPA1678. Its not JFET but CMOS however still much lower noise than TL072.
5532 original JRC...30 here, TL072 was 15
Play with input and output resistances, and supply voltage on 072, worth the trouble, use a symmetric supply with 0 to ground.
Good results with 2.2 R on input and 15 R on output, supply split from 17 volts using 470 uf 25 / 35 V electrolytics with 100 nF in parallel.
And use a grounding ring track on the edge of the PCB, all grounds go to this track, and that is also connected to ground of in and out signal.
AD797 was also there, price no idea.
Play with input and output resistances, and supply voltage on 072, worth the trouble, use a symmetric supply with 0 to ground.
Good results with 2.2 R on input and 15 R on output, supply split from 17 volts using 470 uf 25 / 35 V electrolytics with 100 nF in parallel.
And use a grounding ring track on the edge of the PCB, all grounds go to this track, and that is also connected to ground of in and out signal.
AD797 was also there, price no idea.
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Thnks, but i'm more interested in PDIP package although it seems i don't have much option. It's true that today most good economy opamps are (jfet or bipolar) only available in SMD package. Anyway it was just a query. In most situation tl0xx series and bipolar type like 5532 works without any problem so i've nothing to worry 🙂
I still use TLO64/74/84 in my applications.
So long as feedback resistor isnt too high they perform well.
Even then a few pf across feedback resistor tames them.
So long as feedback resistor isnt too high they perform well.
Even then a few pf across feedback resistor tames them.
Thanks for the advice but i always buy from RS component or from some reputed offline(local) component dealers 🙂 ....& i'm very good at recognising fake op-amps, no one can fool me 😀
OPA2134 is phenomenal but i'd like to use it only for hi-end audio. How about old venerable lf356?
OPA2134 is phenomenal but i'd like to use it only for hi-end audio. How about old venerable lf356?
Hi, it seems you're the biggest supporter of lf353 in this forum. But why? tl072 and lf353 almost identical as per datasheet spec. Anyway i placed an order for some lf353 🙂
TI has upgraded the tl074 recently “h” suffix iirc check it out no dip or try a opa1656.
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The H version produces much more noise than the standard version.
I made the attached list for another thread and not everything on it has a JFET input stage, but maybe it will be useful anyway.
I made the attached list for another thread and not everything on it has a JFET input stage, but maybe it will be useful anyway.
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Speaking of AD, their TL07x competitor was the AD711/12/13 (single / dual / quad) series. Linear's was the LT1057. The latter was measured by Samuel Groner, the former wasn't. TI's own newer TLE2072 (also measured) never really caught on, it has a bit of a reputation for being tricky to stabilize.... it's a much faster part, with phase margin possibly not being the greatest, but it does in fact perform substantially better.
LF356 is a bit of a specialty part... while basic linearity isn't as good as a TL071's, this device has a much hotter-running output stage that deals with medium-impedance loads much better than its contemporaries, even if it'll only still make it to +19 dBu with a 600 ohm load on a +/-15 V supply. That's also why it's not a dual, 6 mA per channel would have been beyond DIP-8 thermals otherwise.
LF356 is a bit of a specialty part... while basic linearity isn't as good as a TL071's, this device has a much hotter-running output stage that deals with medium-impedance loads much better than its contemporaries, even if it'll only still make it to +19 dBu with a 600 ohm load on a +/-15 V supply. That's also why it's not a dual, 6 mA per channel would have been beyond DIP-8 thermals otherwise.
I meant AD797 
Do you recommend lf356 for output buffer or gain stage? How is the sonic character? lf353/tl072 is still a good competitor if you take the price into consideration, dual vs. single plus quite similar specification.
Do you recommend lf356 for output buffer or gain stage? How is the sonic character? lf353/tl072 is still a good competitor if you take the price into consideration, dual vs. single plus quite similar specification.
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I just put NJM 072BD and then LF353N in my PCM1798 DAC. They measure very differently. The LF353N (old National parts) performed amazingly well. The TL072 performs poorly in that application. I put them in the I/V and the filter locations. (Using the BB schematic.)
In order the graphs are NJM 072BD, LF353N, LF356M and LM4562NA.
These are single ended measurements at 6kHz (to make it harder than 1kHz) -3 dBFS. Later I will do balanced measurements with my E-MU 1616m.
In order the graphs are NJM 072BD, LF353N, LF356M and LM4562NA.
These are single ended measurements at 6kHz (to make it harder than 1kHz) -3 dBFS. Later I will do balanced measurements with my E-MU 1616m.
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If memory serves, another issue with LM358 is the slew rate. I don't see any spec in the data sheet except a graph that implies an asymmetric 0.25V/uS positive and a bit better negative. This means 20KHz signals >~2VP will be slew limited and expect the distortion to rise with frequency well below 20Kz and 2V. It's been 30+ years since I worried about these things and some of these are that old. Has anyone updated the work of Walt Jung? It's important that the list not be polluted with exotic and expensive parts, but I don't know what is common any more. I have found a lot of RC4558 parts in commercial equipment. RC4558 is/was a dual version of RC4136, which was perhaps the first audio quality op-amp, but 4136 had an odd pin-out and was generally inferior to TL0(78)(124). It's interesting that 5534/5532 has lasted so well, being a well crafted hack that dealt with the limitations of 1970 monolithic chips.