<html xmlns:v="urn:schemas-microsoft-com:vml" xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns:m="http://schemas.microsoft.com/office/2004/12/omml" xmlns="http://www.w3.org/TR/REC-html40"><head><meta http-equiv=Content-Type content="text/html; charset=utf-8"><meta name=Generator content="Microsoft Word 14 (filtered medium)"><style><!--
/* Font Definitions */
@font-face
{font-family:Calibri;
panose-1:2 15 5 2 2 2 4 3 2 4;}
@font-face
{font-family:Tahoma;
panose-1:2 11 6 4 3 5 4 4 2 4;}
/* Style Definitions */
p.MsoNormal, li.MsoNormal, div.MsoNormal
{margin:0cm;
margin-bottom:.0001pt;
font-size:12.0pt;
font-family:"Times New Roman","serif";}
a:link, span.MsoHyperlink
{mso-style-priority:99;
color:blue;
text-decoration:underline;}
a:visited, span.MsoHyperlinkFollowed
{mso-style-priority:99;
color:purple;
text-decoration:underline;}
p
{mso-style-priority:99;
mso-margin-top-alt:auto;
margin-right:0cm;
mso-margin-bottom-alt:auto;
margin-left:0cm;
font-size:12.0pt;
font-family:"Times New Roman","serif";}
span.EmailStyle18
{mso-style-type:personal-reply;
font-family:"Calibri","sans-serif";
color:#1F497D;}
.MsoChpDefault
{mso-style-type:export-only;
font-family:"Calibri","sans-serif";
mso-fareast-language:EN-US;}
@page WordSection1
{size:612.0pt 792.0pt;
margin:70.85pt 70.85pt 70.85pt 70.85pt;}
div.WordSection1
{page:WordSection1;}
--></style><!--[if gte mso 9]><xml>
<o:shapedefaults v:ext="edit" spidmax="1026" />
</xml><![endif]--><!--[if gte mso 9]><xml>
<o:shapelayout v:ext="edit">
<o:idmap v:ext="edit" data="1" />
</o:shapelayout></xml><![endif]--></head><body lang=FR-CA link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span lang=EN-CA style='font-size:11.0pt;font-family:"Calibri","sans-serif"'>></span><span lang=EN-CA style='font-family:"Calibri","sans-serif"'> Don't look for shortcuts when it comes to CV. Get decent 16 bit ADC/DAC. </span><span style='font-family:"Calibri","sans-serif"'>They are dirt cheap now.<o:p></o:p></span></p><p class=MsoNormal><span style='font-family:"Calibri","sans-serif"'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-CA style='font-family:"Calibri","sans-serif"'>Any ADC chip suggestions ??<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-CA style='font-family:"Calibri","sans-serif"'>At Digikey, the cheapest 5v supply DIP 16bits ADC is Maxim’s </span><span style='font-family:"Calibri","sans-serif"'><a href="https://www.digikey.ca/en/products/detail/maxim-integrated/MX7705EPE/1302785"><span lang=EN-CA style='color:windowtext'>MX7705EPE+</span></a></span><span lang=EN-CA style='font-family:"Calibri","sans-serif"'> at $15.09US each<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-CA style='font-size:11.0pt;font-family:"Calibri","sans-serif"'>16 bits DAC’s are cheaper..<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-CA style='font-size:11.0pt;font-family:"Calibri","sans-serif"'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-CA style='font-size:11.0pt;font-family:"Calibri","sans-serif"'>JP<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-CA style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><b><span lang=FR style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>De :</span></b><span lang=FR style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'> Roman [mailto:modular@go2.pl] <br><b>Envoyé :</b> 29 janvier 2021 13:48<br><b>À :</b> 'SYNTH DIY'; Jean-Pierre Desrochers<br><b>Objet :</b> ODP: [sdiy] CV/Gate delay project..<o:p></o:p></span></p><p class=MsoNormal><o:p> </o:p></p><p style='margin:0cm;margin-bottom:.0001pt'><span lang=EN-CA>Don't look for shortcuts when it comes to CV. </span>Get decent 16 bit ADC/DAC. They are dirt cheap now. <span lang=EN-CA>And I mean decent, because many new 16bit converters have 13-bit linearity and sometimes even only 10-bit.<o:p></o:p></span></p><p style='margin:0cm;margin-bottom:.0001pt'>Might be a challenge if you require THT though.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p style='margin:0cm;margin-bottom:.0001pt'>Roman<o:p></o:p></p><p class=MsoNormal style='margin-bottom:12.0pt'><br><br>---- Użytkownik Jean-Pierre Desrochers napisał ----<br><br>Hi list,<br><br><br><br>I'm working on a new module for my DOTCOM modular.<br><br>It would memorize incoming CV's and Gate's state for 2msec up to 10sec <br><br>then spit the stream in steps of 1msec.<br><br>The code for Gate memorizing is done.<br><br>I'm now wondering if using a Microchip PIC 10bits ADC is<br><br>linear enough to read incoming CV values (0 to 8vdc)...<br><br>There will be an input buffer amplifier that will take care<br><br>of taking down the 0to8vdc to 0to5vdc for the PIC.<br><br>Incoming CV's 0-8vdc, 12 semitones/octaves.. that makes 1024 / (8 x 12)..<br><br>around 10 steps between each semi-tones.<br><br>My worry is the PIC ADC linearity precision..<br><br>The 10bits memorized values will be output using a 12bits SPI DAC.<br><br>I have a bunch of old PIC16F88 that I want to utilize here.<br><br>Old but still usable for SPI.<br><br>What do you think about PIC's ADC linearity wise ?<br><br><br><br>JP<br><br><br><br>_______________________________________________<br><br>Synth-diy mailing list<br><br><a href="mailto:Synth-diy@synth-diy.org">Synth-diy@synth-diy.org</a><br><br><a href="http://synth-diy.org/mailman/listinfo/synth-diy">http://synth-diy.org/mailman/listinfo/synth-diy</a><br><br>Selling or trading? Use <a href="mailto:marketplace@synth-diy.org">marketplace@synth-diy.org</a><o:p></o:p></p></div></body></html>