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DestinyAwaits , 04-10-2024, 03:41 PM

Package is 0805 for all three Capacitors with Ceramic MCC SMD

DestinyAwaits , 04-10-2024, 03:49 PM

I still need a compatible Differential Amplifier and a 24-bit ADC because I don't think the ESP32 ADC is very good.

Sniper2 , 04-10-2024, 04:09 PM

what dielectric

Sniper2 , 04-10-2024, 04:10 PM

it is not , it is 12bit resolution but in practice 10 if i remember well

DestinyAwaits , 04-10-2024, 04:36 PM

X7R dielectrics

DestinyAwaits , 04-10-2024, 04:36 PM

for both

Sniper2 , 04-10-2024, 04:39 PM

not great for audio since it buzzez

DestinyAwaits , 04-10-2024, 04:39 PM

Knowles 0805J0100104KXR for 100nF
Samsung Electro-Mechanics CL21B106KPQNNNF for 10uF

DestinyAwaits , 04-10-2024, 04:39 PM

Okay. Which one to choose then ?

Sniper2 , 04-10-2024, 04:39 PM

CoG dielectric

Sniper2 , 04-10-2024, 04:40 PM

or electrolithic

Sniper2 , 04-10-2024, 04:40 PM

want a open source reference design ?

DestinyAwaits , 04-10-2024, 04:40 PM

You can provide not sure If I will be able to understand or not

DestinyAwaits , 04-10-2024, 04:41 PM

I will still try to read

Sniper2 , 04-10-2024, 04:42 PM

https://github.com/immortal-sniper1/cross_band_handy_walkie_talkie

Sniper2 , 04-10-2024, 04:42 PM

there

Sniper2 , 04-10-2024, 04:43 PM

it works

Sniper2 , 04-10-2024, 04:43 PM

uses esp32 too + some code in there

DestinyAwaits , 04-10-2024, 04:43 PM

is there a way to find these capacitors in https://www.lcsc.com as I do not find them

Sniper2 , 04-10-2024, 04:46 PM

https://www.lcsc.com/products/Aluminum-Electrolytic-Capacitors-SMD_418.html
or
https://www.lcsc.com/products/Multilayer-Ceramic-Capacitors-MLCC-SMD-SMT_313.html with COG filter

Sniper2 , 04-10-2024, 04:46 PM

LCSC/JLC filters are on page not in URL so u need to filter localy

DestinyAwaits , 04-10-2024, 04:50 PM

Package: 0805
Voltage: 10V
Tolerance: +- 10%
Capacitance: 100nF and 10uF

Now Temperature Coefficient disables COG

DestinyAwaits , 04-10-2024, 04:50 PM

Please try

Sniper2 , 04-10-2024, 04:53 PM

COG should be stable

Sniper2 , 04-10-2024, 04:53 PM

try without temp

Sniper2 , 04-10-2024, 04:53 PM

LCSC filters are bad anyway

DestinyAwaits , 04-10-2024, 04:53 PM

digikey ?

Sniper2 , 04-10-2024, 04:55 PM

https://github.com/yaqwsx/jlcparts

DestinyAwaits , 04-10-2024, 04:58 PM

Updating component library

DestinyAwaits , 04-10-2024, 05:00 PM

I will let you know what I find.Thank you for today. It will take time for me to understand it more. I can say not even close to fabrication step. 🙂

Sniper2 , 04-10-2024, 05:00 PM

i can see

Sniper2 , 04-10-2024, 06:02 PM

so?

Sniper2 , 04-10-2024, 06:02 PM

do u get it?

QDrives , 04-10-2024, 07:19 PM

You will not find 100nF or 10uF in C0G.
Best is to use electrolytic (polymer) or tantalum. You can add a local C0G for the high frequency (1...10nF).

Sniper2 , 04-10-2024, 07:34 PM

true

DestinyAwaits , 04-11-2024, 01:34 AM

Did not find COG. Now am not sure if package 0805 is correct or not for both 10uF and 100nF?

If possible for both of you can you provide the parts I should use? Finding it difficult to search the right parts. The mems microphone max supply is 3V and I will pair this with 3.3V ESP32 that is why I chose 10V. Can you please share if not links but direct part number to search will be really helpful. 🙏

Sniper2 , 04-11-2024, 04:09 AM

Use lectrolithic

Sniper2 , 04-11-2024, 04:09 AM

@DestinyAwaits

Sniper2 , 04-11-2024, 04:10 AM

Ps since the audio ends up in a adc / codec you will not care so much about voltage anyway

DestinyAwaits , 04-11-2024, 04:47 AM

@Sniper2 bro can you share the part number searchable on LCSC or any other site? Like I shared earlier as below?

Knowles 0805J0100104KXR for 100nF
Samsung Electro-Mechanics CL21B106KPQNNNF for 10uF

Sniper2 , 04-11-2024, 03:02 PM

It is in my kicad project

Sniper2 , 04-11-2024, 03:02 PM

@DestinyAwaits

Sniper2 , 04-11-2024, 03:02 PM

What can't u find?

DestinyAwaits , 04-11-2024, 03:18 PM

I haven't gone through the project yet. Let me check the BOM file to find the capacitors. Thank you @Sniper2

DestinyAwaits , 04-11-2024, 04:29 PM

@Sniper2 the bom in project for one capacitor was using X7R only not COG I checked the part C14663
50V 100nF X7R ±10% 0603 Multilayer Ceramic Capacitors MLCC - SMD/SMT ROHS

Sniper2 , 04-11-2024, 04:37 PM

ok

QDrives , 04-12-2024, 03:45 PM

Pick one from the list
https://www.digikey.nl/en/products/filter/aluminum-polymer-capacitors/69?s=N4IgjCBcoGwJxVAYygMwIYBsDOBTANCAPZQDaIALAAxwDMdIAuoQA4AuUIAymwE4CWAOwDmIAL6EATFQoJoIFJAw4CxMuCoACAK0AxEITCSd%2BwwFYTB8AA5LU43quSA7HZC1ab%2Bm4qvHhMxg3GFt-EGsHUw0tR2YQdk4AVUF%2BNgB5VABZXHRsAFdeXHEpKmc5ZDQsPEISSHIYADpPADUrW1bDSQaLDvBjXrAtAaDWuITIEGTUjOzcgqKJEABaSUQFKD481VryBACmRaXaNcVN7fVBg8Il8vXIM5qLg8WYNf4AE04lwYhWDgmrGwAJ4sIoTXIoMRiIA

DestinyAwaits , 04-14-2024, 10:01 AM

@QDrives okay. Thank you. I am checking now.

Sniper2 , 04-16-2024, 07:06 PM

@DestinyAwaits progress?

DestinyAwaits , 04-17-2024, 08:53 AM

@Sniper2 I got in touch with Infineon to get the help related to the data. Once I get concrete answers I will update.