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Get C0G performance up to 0.47uF

Started by Winfield Hill October 4, 2016
 C0G and NP0 capacitor dielectrics are popular for their low
 or zero capacitance change with voltage.  However in small 
 SMT packages, 0805, they're only available up to ~ 0.01uF.
 For higher values we're forced to use X7R, Z5U or other 
 inferior dielectrics.  These might change in value by 15% 
 to over 50% at the rated voltage.

 But, whoa, Kemet has announced a new dielectric, type U2J,
 which can give us high capacitance values, to 0.056 uF in
 0805 and 0.22uF in 1206, with C0G-like voltage properties.
 The largest size, 1812, offers 0.47uF at 25V.  Impressive.

 "negligible shift in capacitance with respect to voltage
 and boasts a predictable and linear change in capacitance
 with reference to ambient temperature with no aging effect"

 I like C0G because most types exhibit essentially zero
 DA, dielectric absorption.  Perhaps U2J will be as good.

 Newark has them in stock.  They have up to 0.33uF.
 www.newark.com/webapp/wcs/stores/servlet/Search?st=u2j


-- 
 Thanks,
    - Win
On 4 Oct 2016 11:58:39 -0700, Winfield Hill <hill@rowland.harvard.edu>
wrote:

> C0G and NP0 capacitor dielectrics are popular for their low > or zero capacitance change with voltage. However in small > SMT packages, 0805, they're only available up to ~ 0.01uF. > For higher values we're forced to use X7R, Z5U or other > inferior dielectrics. These might change in value by 15% > to over 50% at the rated voltage. > > But, whoa, Kemet has announced a new dielectric, type U2J, > which can give us high capacitance values, to 0.056 uF in > 0805 and 0.22uF in 1206, with C0G-like voltage properties. > The largest size, 1812, offers 0.47uF at 25V. Impressive. > > "negligible shift in capacitance with respect to voltage > and boasts a predictable and linear change in capacitance > with reference to ambient temperature with no aging effect" > > I like C0G because most types exhibit essentially zero > DA, dielectric absorption. Perhaps U2J will be as good. > > Newark has them in stock. They have up to 0.33uF. > www.newark.com/webapp/wcs/stores/servlet/Search?st=u2j
Interesting, but the specs are sort of minimal. If you test some, please let us know what you discover. Tempco one one is spec'd as -750 &#2013266097;12030 ppm/&#2013266106;C !!!! -- John Larkin Highland Technology, Inc picosecond timing precision measurement jlarkin att highlandtechnology dott com http://www.highlandtechnology.com
On Tue, 04 Oct 2016 12:46:32 -0700, John Larkin
<jjlarkin@highlandtechnology.com> wrote:

>On 4 Oct 2016 11:58:39 -0700, Winfield Hill <hill@rowland.harvard.edu> >wrote: > >> C0G and NP0 capacitor dielectrics are popular for their low >> or zero capacitance change with voltage. However in small >> SMT packages, 0805, they're only available up to ~ 0.01uF. >> For higher values we're forced to use X7R, Z5U or other >> inferior dielectrics. These might change in value by 15% >> to over 50% at the rated voltage. >> >> But, whoa, Kemet has announced a new dielectric, type U2J, >> which can give us high capacitance values, to 0.056 uF in >> 0805 and 0.22uF in 1206, with C0G-like voltage properties. >> The largest size, 1812, offers 0.47uF at 25V. Impressive. >> >> "negligible shift in capacitance with respect to voltage >> and boasts a predictable and linear change in capacitance >> with reference to ambient temperature with no aging effect" >> >> I like C0G because most types exhibit essentially zero >> DA, dielectric absorption. Perhaps U2J will be as good. >> >> Newark has them in stock. They have up to 0.33uF. >> www.newark.com/webapp/wcs/stores/servlet/Search?st=u2j > >Interesting, but the specs are sort of minimal. If you test some, >please let us know what you discover. > >Tempco one one is spec'd as -750 &#2013266097;12030 ppm/&#2013266106;C !!!!
That must have been a typo. Another data sheet says -750&#2013266097;120 ppm/&#2013266106;C. So it's a standard-part N750! -- John Larkin Highland Technology, Inc picosecond timing precision measurement jlarkin att highlandtechnology dott com http://www.highlandtechnology.com
> >> > >> But, whoa, Kemet has announced a new dielectric, type U2J, > >> which can give us high capacitance values, to 0.056 uF in > >> 0805 and 0.22uF in 1206, with C0G-like voltage properties. > >> The largest size, 1812, offers 0.47uF at 25V. Impressive. > >> > >> "negligible shift in capacitance with respect to voltage > >> and boasts a predictable and linear change in capacitance > >> with reference to ambient temperature with no aging effect" > >> > >> I like C0G because most types exhibit essentially zero > >> DA, dielectric absorption. Perhaps U2J will be as good. > >>
piezoelectric sensitivity is also an important spec for PLL loop filters m
On Tuesday, October 4, 2016 at 2:59:02 PM UTC-4, Winfield Hill wrote:
> C0G and NP0 capacitor dielectrics are popular for their low > or zero capacitance change with voltage. However in small > SMT packages, 0805, they're only available up to ~ 0.01uF. > For higher values we're forced to use X7R, Z5U or other > inferior dielectrics. These might change in value by 15% > to over 50% at the rated voltage. > > But, whoa, Kemet has announced a new dielectric, type U2J, > which can give us high capacitance values, to 0.056 uF in > 0805 and 0.22uF in 1206, with C0G-like voltage properties. > The largest size, 1812, offers 0.47uF at 25V. Impressive. > > "negligible shift in capacitance with respect to voltage > and boasts a predictable and linear change in capacitance > with reference to ambient temperature with no aging effect" > > I like C0G because most types exhibit essentially zero > DA, dielectric absorption. Perhaps U2J will be as good. > > Newark has them in stock. They have up to 0.33uF. > www.newark.com/webapp/wcs/stores/servlet/Search?st=u2j
Nice Thanks, http://www.farnell.com/datasheets/2062177.pdf?_ga=1.23602557.674654405.1461093753 DF (dissipation factor) is low too. George H.
> > > -- > Thanks, > - Win