You still have quite a loop even with small TH parts, I think it matters for chipdecoupling, most times not on input, although I think two stage MKS coupling might be much, they do have "a sound", chocoholic used some small FKP, but also SMD's for close decoupling when needed.
The ones I mentioned are neutral sounding. Try them once and you'll like them. We should be careful with assumptions and "thinking", better try them out. I choose them as most SMD caps with various dielectrics have a "sound". Maybe I can convince you by sending a few ? I stock these. The 22 µF 16V 5 mm pitch are excellent as well. One of the members here uses these on ESS DACs with very good results. So good that I only have a few left for my own use 🙂
Without any prejudice/prethinking these 1 µF 2.5 mm pitch MKS caps were tested on Subbu V3 for decoupling negative supply (1 MHz charge pump) and performed the best of all tested caps, theoretical loop issues aside.
Without any prejudice/prethinking these 1 µF 2.5 mm pitch MKS caps were tested on Subbu V3 for decoupling negative supply (1 MHz charge pump) and performed the best of all tested caps, theoretical loop issues aside.
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Does it run stable with n this configuration? Most/All ldo regulators need their cap on the output as part of the regulation loop and good hf rejection. Also the ESR can be critical, data sheet should state that. Not all regulators are stable with super low MLCC ESR.
(So have an MLCC first)
It would help if the type number of the LDO was mentioned 😉 Many modern ones are performing perfectly fine with ultra low ESR caps while others are not. Decoupling cap must be tied to the output pin indeed !
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New Japan 100mA 12V regulator, few cents, need to lookup number, yes Wiener uses mlcc cap on regulator output too, it can take mlcc low esr directly.
As mentioned I did use MKS some times, it is prejudice after using them on classD ampboards, look at for example hiampmini, all TH small footprint design, they are on ebay, you can try them too.
As mentioned I did use MKS some times, it is prejudice after using them on classD ampboards, look at for example hiampmini, all TH small footprint design, they are on ebay, you can try them too.
Again, did you use the Wima MKS 2.5 mm type specifically ? You mentioned having used "cheap" Panasonic and Kemet film smd caps. Thanks for the tip for trying them out but I already use them as my standard cap when it needs to be small and good 🙂 I googled for "hiampmini" but haven't found the one you are pointing at.
What New Japan 12V regulator of a few cents someone else uses ? IMHO low noise and more than 24V input voltage would be key parameters to choose a reg for this application.
What New Japan 12V regulator of a few cents someone else uses ? IMHO low noise and more than 24V input voltage would be key parameters to choose a reg for this application.
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Hiamplifier ebay seller and member here, 50x50mm $27 I believe, I didn't use any of those parts in ebay ad, just the pcb and chip, my first two 3116's, dominantly red on green pcb 🙂
Simple 78 series, I remember NJM tested for jobrelated function by gmarsh and found stable with mlcc direct on output, better options for one NE5532 phase splitter like used by TI EVM 3251 ? (no gain needed with tpa31xx)
http://www.njr.com/semicon/PDF/NJM78L00_E.pdf
Simple 78 series, I remember NJM tested for jobrelated function by gmarsh and found stable with mlcc direct on output, better options for one NE5532 phase splitter like used by TI EVM 3251 ? (no gain needed with tpa31xx)
http://www.njr.com/semicon/PDF/NJM78L00_E.pdf
Stable with MLCC cap on output but a whopping typical 160 µV of noise. Better don't look at others and don't even think of using such a part please. Can't you find a better one ?
TI's standard UA7812 in TO220 has only 40 µV of noise. LF120 exists in SMD package....
TI's standard UA7812 in TO220 has only 40 µV of noise. LF120 exists in SMD package....
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TI doesn't even get NE5532 off pcb ground classD tpa3251, no effect because high psrr they say ? So would it change anything ?
Like one of my colleagues used to say: Design for the worst and expect the best 🙂
Using 78XX in one of its worst incarnations won't result in kudos from the audio community. No bling factor 😀
Using 78XX in one of its worst incarnations won't result in kudos from the audio community. No bling factor 😀
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NE5532 probably same reaction 🙂 ClassD also. But there is clc and some additional c's and r's around opamp, and differential some noise might cancel somewhat ???? I just saw mentioned taking ne5532 off what must be very very noisy groundplane isn't needed, classD has very noisy groundplane with high currents high amperes, so high voltage differences over distance, hence small or compact is a benefit, postfilter feedback added filtering to groundplane probably creates even noisier groundplane. My ne5532 is off classD digital groundplane somewhat, just analog groundpin and, yes there is gvdd decoupling (part of switching outputmosfets powersupply LOL, so might not be quiet quiet).
TI 32xx evm output noisefloor without feedback is below 20dB setting tpa3116 I believe, with added feedback and outputfiltering a little lower even. Sanwu 32dB gain noisefloor somehow seemed lower to me from graphs than TI 3116 EVM 26dB noisefloor btw.
TI 32xx evm output noisefloor without feedback is below 20dB setting tpa3116 I believe, with added feedback and outputfiltering a little lower even. Sanwu 32dB gain noisefloor somehow seemed lower to me from graphs than TI 3116 EVM 26dB noisefloor btw.
Designed to compete with ceramic caps and mainly small size. Main selling point is "superior to MLCC ceramic". When it gets exiting they even only compare with ceramic caps. Cleverly written document.
Dielectric absorption of PML CAP is equivalent to that for polyester film capacitor, both of which are much superior to MLCC.
Without restriction in size, polypropylene film capacitor with large lead wires is more excellent in dielectric absorption. However PML CAP is the best capacitor having both of good dielectric absorption characteristic and small size.
Dielectric absorption of PML CAP is equivalent to that for polyester film capacitor, both of which are much superior to MLCC.
Without restriction in size, polypropylene film capacitor with large lead wires is more excellent in dielectric absorption. However PML CAP is the best capacitor having both of good dielectric absorption characteristic and small size.
Lower ESL. "Huge" 15mm polyprops are called induction free, in smd world that free means enormous, can't be used, never close to real capacitor 🙂
Yeah those rubycons will perform better. Just like the 78XX.
There is coupling and decoupling ...
There is coupling and decoupling ...
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Ya I'm somewhat concerned over long term availability. If same footprint as ceramic then ok. I still checking it out.
They removed audio from datasheet, so better chance now 🙂 Bigger than classII, smaller than cog.
The 5532 does fine with proper star-ground for the inputs signals (like shown in the TI documents). (I mean look what the EVM is achieving in THD+N with just 5532's) It might be suspicious to 4g noise. If you have space left, put ferrites on all inputs and outputs directly. (1k@100MHz minimum)
I also put ferrites direct in front of the 3132 inputs to make it more EMI harden.
If you need some extra reliability, go for SA5532 (TI) with extended temperature range.
A worth upgrade will be the OPA1688 then. (Which is EMI hardened by design)
Yes, if you remember the TDK MKT is tried on the small 3251 boards? There where picking up switching noise from the output stage due to internal construction. (Result: increased THD)
I also put ferrites direct in front of the 3132 inputs to make it more EMI harden.
If you need some extra reliability, go for SA5532 (TI) with extended temperature range.
A worth upgrade will be the OPA1688 then. (Which is EMI hardened by design)
Yes, if you remember the TDK MKT is tried on the small 3251 boards? There where picking up switching noise from the output stage due to internal construction. (Result: increased THD)
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