<html><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class="">I also notice now that I’d missed that the figure given is actually 8uV / sqrt(Hz), which they’ve expressed as uV/(Hz)<span style="font-size: 10px;" class="">1/2</span><div class=""><font size="1" class=""><br class=""></font></div><div class="">I assumed the superscript referred to the notes under the table (which is Microchip’s usual style, to be fair), but that’s not what’s going on here - it’s an exponent.</div><div class=""><br class=""><div class="">
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<div><br class=""><blockquote type="cite" class=""><div class="">On 16 Mar 2021, at 00:29, Tom Wiltshire <<a href="mailto:tom@electricdruid.net" class="">tom@electricdruid.net</a>> wrote:</div><br class="Apple-interchange-newline"><div class=""><div class="">Aah! OK, thanks Brian. Yes, flicker noise I know about, but I hadn’t made the connection.<br class=""><br class="">I still don’t understand the units though. How could I convert a flicker noise measurement like 8uV/Hz to a RMS measurement across a given bandwidth like the other data sheets offer? Is that even possible? I’m starting to suspect some manufacturers don’t *want* me to be able to compare specs with their competitors! ;)<br class=""><br class="">Tom <br class=""><br class="">==================<br class=""> Electric Druid<br class="">Synth & Stompbox DIY<br class="">==================<br class=""><br class=""><br class=""><br class=""><blockquote type="cite" class="">On 16 Mar 2021, at 00:05, Brian Willoughby <<a href="mailto:brianw@audiobanshee.com" class="">brianw@audiobanshee.com</a>> wrote:<br class=""><br class="">Look up the tern, 1/f noise, a.k.a. Flicker noise.<br class=""><br class="">That sort of noise seems to be reported in V/Hz. In this case, it's µV/Hz.<br class=""><br class=""><a href="https://en.wikipedia.org/wiki/Flicker_noise" class="">https://en.wikipedia.org/wiki/Flicker_noise</a><br class=""><br class="">Brian<br class=""><br class=""><br class="">On Mar 15, 2021, at 16:57, Tom Wiltshire wrote:<br class=""><blockquote type="cite" class="">Hi All,<br class=""><br class="">I’ve been reading data sheets for linear regulators, and I’ve got a question.<br class=""><br class="">Some regulators specific the output noise voltage from 10Hz to 100KHz as an RMS level, usually uV. However, the Microchip MCP1702 specifies an output noise figure as 8 uV/Hz. What does this mean? What’s the relationship between uV/Hz and RMS uV?<br class=""><br class="">Here’s the datasheet:<br class=""><br class="">https://4donline.ihs.com/images/VipMasterIC/IC/MCHP/MCHPS03366/MCHPS03366-1.pdf?hkey=6D3A4C79FDBF58556ACFDE234799DDF0<br class=""><br class="">Thanks for any guidance!<br class=""><br class="">Tom<br class=""></blockquote><br class=""></blockquote><br class=""></div></div></blockquote></div><br class=""></div></body></html>