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ES9023 / WM8804 S/PDIF DAC Parts GB EU Only

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#121
Finally I've received my ES9023 PCBs this afternoon, little boards : 80 x 50 mm only.

Dear Emeritus would you please point me the correct way to solder the polarized Tantalums caps ?
(C19, C22, C26, C29 and C8 for SE and C19, C22, C26 and C8 for BAL)
I've scanned the PCB and highlight concerned Tantalum caps footprint.
Thanks for your "enlighted" advices 😉
 

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#123
That's correct. If you are in doubt, one small trick (that's what I did) - measure the pads to the ground, there should be continuity between ground and -ve pad.

C8 is after the inductor (L3), so it can be the same parts as in the BOM which is non-polarized. Regardless, the above trick will tell you the correct orientation quickly.
 
#124
pchw said:
C8 is after the inductor (L3), so it can be the same parts as in the BOM which is non-polarized.
Click to expand...

Wrong, C8 was changed to a 4.7 µF 10 or 16 V tantalum cap as the regs don't like too low ESR caps at their outputs. Phil, you are right about the polarity. They are correct in the picture in post #122 but C8 is orientated the opposite way so + to the upper side. Normally I would have orientated all the same way but we started with non polarized caps in which case it would not have mattered.
 
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#126
jean-paul said:
Wrong, C8 was changed to a 4.7 µF 10 or 16 V tantalum cap as the regs don't like too low ESR caps at their outputs.
Click to expand...

Yeah, but C8 is not right after the reg. It is C19 - L3 - C8. Are you saying L3 is not enough to decouple C8 from the reg? Anyway, I have no problem with using the 1uF film cap as in the BOM.

Edit: so the revised circuit is C19 (4.7uF tanlaum) -> L3 -> C8 (4.7uF tanlalum), i.e. C8 is changed from the 1uF film to 4.7uF tantalum.
 
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#127
jean-paul said:
Phil, you are right about the polarity. They are correct in the picture in post #122 but C8 is orientated the opposite way so + to the upper side.
Click to expand...

Great Jean-Paul, thanks.
BTW the attached pic should be correct.
GB members will receive C19-22-26-29-8 (SE) or C19-22-26-8 (BAL) Vishay/Sprague 4.7µF/10v Tantalum caps, according to ordered versions.
Second pic shows Tantalum SMD cap, white line indicates "+" polarity side.
Regards

Phil
 

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#128
pchw said:
Yeah, but C8 is not right after the reg. It is C19 - L3 - C8. Are you saying L3 is not enough to decouple C8 from the reg? Anyway, I have no problem with using the 1uF film cap as in the BOM.

Edit: so the revised circuit is C19 (4.7uF tanlaum) -> L3 -> C8 (4.7uF tanlalum), i.e. C8 is changed from the 1uF film to 4.7uF tantalum.
Click to expand...

Thanks for telling me what is in our design 😉 It was repeated a few times that 4.7 µF tantalum is better for C8. It is not a major difference but still. But as always YMMV, I invite you to try it out.

pchw said:
Edit: so the revised circuit is C19 (4.7uF tantalum) -> L3 -> C8 (4.7uF tantalum), i.e. C8 is changed from the 1uF film to 4.7uF tantalum.
Click to expand...

Apart from the original spelling errors this is correct.
 
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#129
korben69 said:
Great Jean-Paul, thanks.
BTW the attached pic should be correct.
GB members will receive C19-22-26-29-8 (SE) or C19-22-26-8 (BAL) Vishay/Sprague 4.7µF/10v Tantalum caps, according to ordered versions.
Second pic shows Tantalum SMD cap, white line indicates "+" polarity side.
Regards

Phil
Click to expand...



Second pic shows Tantalum SMD cap, white line indicates "+" polarity side.

Please let everyone read this.
 

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#134
Please wait with soldering the caps. I just thought yours should be a special version considering all your effort with the power supply dilemma/group buy. Wait for the postman !

Mmm, I just read you will be using USB. Nearly made me change my thoughts.
 
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#136
Hi All

As expected, I've received this morning last delivery (Tantalum), and packed all the parcels.

Today, I've sent those members parts :
APK - DiyYes - schuhbu - touchdown - mrwireless - Tome - gig - Ginum - danzup - Ciu - skouliki

Tracking will be available tomorrow, have a look a the GoogleDoc for the number.
I hope to be abble to ship remaining enveloppes tomorrow.
Regards

Phil

PS : sorry gig, I've missed your morning mail 🙁
 
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#140
SMD parts populated.

Nothing special, be carefull with C8, must be soldered after Q2.

I've begun with ES9023, WM8804, MIC5205, 74LVC1, followed with 0805 resistors and caps, 1210 caps, inductors, crystal & oscillator, tantalum caps, film caps and electrolytics.
No solder bridge on WM8804 😉

C10 is very close to C10b, you need to bend a little C16 & C31.
That's all, firing on Monday in SE configuration.

Phil
 

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