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<?xml-stylesheet type="text/xsl" href="https://devzone.nordicsemi.com/cfs-file/__key/system/syndication/rss.xsl" media="screen"?><rss version="2.0" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:slash="http://purl.org/rss/1.0/modules/slash/" xmlns:wfw="http://wellformedweb.org/CommentAPI/" xmlns:atom="http://www.w3.org/2005/Atom"><channel><title>C0 in the nRF51 XO spec</title><link>https://devzone.nordicsemi.com/f/nordic-q-a/33519/c0-in-the-nrf51-xo-spec</link><description>Hi team, 
 Let me confirm what&amp;#39;s C0 in the nRF51 32MHz XO spec. It specifies as following but C0 definition cannot be found in the PS. I assume C0 is the load cap where C1 and C2 in the Fig7 below are the same. Am I correct? 
 R S,X32M Equivalent series</description><dc:language>en-US</dc:language><generator>Telligent Community 13</generator><lastBuildDate>Wed, 18 Apr 2018 07:37:34 GMT</lastBuildDate><atom:link rel="self" type="application/rss+xml" href="https://devzone.nordicsemi.com/f/nordic-q-a/33519/c0-in-the-nrf51-xo-spec" /><item><title>RE: C0 in the nRF51 XO spec</title><link>https://devzone.nordicsemi.com/thread/128730?ContentTypeID=1</link><pubDate>Wed, 18 Apr 2018 07:37:34 GMT</pubDate><guid isPermaLink="false">137ad170-7792-4731-bb38-c0d22fbe4515:73140597-da1b-4641-8658-b4d8ce7472ab</guid><dc:creator>Jungo88</dc:creator><description>&lt;p&gt;Thanks Hakon.&lt;/p&gt;
&lt;p&gt;Noted that C0 is from equivalent crystal model.&lt;/p&gt;
&lt;p&gt;Jungo&lt;/p&gt;&lt;div style="clear:both;"&gt;&lt;/div&gt;</description></item><item><title>RE: C0 in the nRF51 XO spec</title><link>https://devzone.nordicsemi.com/thread/128723?ContentTypeID=1</link><pubDate>Wed, 18 Apr 2018 06:18:42 GMT</pubDate><guid isPermaLink="false">137ad170-7792-4731-bb38-c0d22fbe4515:f0a73cd2-7381-49ca-9925-ff51eaf47270</guid><dc:creator>H&amp;#229;kon Alseth</dc:creator><description>&lt;p&gt;Hi,&lt;/p&gt;
&lt;p&gt;&amp;nbsp;&lt;/p&gt;
&lt;p&gt;C0 is the shunt capacitance of the crystal, which&amp;nbsp;is normally quite low (~1 pF).&lt;/p&gt;
&lt;p&gt;Here&amp;#39;s an example equivilant circuit of a crystal, where C0 is shown (&lt;a href="https://en.wikipedia.org/wiki/Crystal_oscillator"&gt;borrowed from the wiki article&lt;/a&gt;):&lt;/p&gt;
&lt;p&gt;&lt;img src="https://devzone.nordicsemi.com/resized-image/__size/320x240/__key/support-attachments/beef5d1b77644c448dabff31668f3a47-4ff7d39d11f146bdaffe26b806aa9d36/pastedimage1524032205812v1.png" alt=" " /&gt;&lt;/p&gt;
&lt;p&gt;&amp;nbsp;&lt;/p&gt;
&lt;p&gt;The C0 parameter shall be found in the datasheet for your chosen crystal part.&lt;/p&gt;
&lt;p&gt;&amp;nbsp;&lt;/p&gt;
&lt;p&gt;Best regards,&lt;/p&gt;
&lt;p&gt;Håkon&lt;/p&gt;&lt;div style="clear:both;"&gt;&lt;/div&gt;</description></item></channel></rss>