Quartz Crystal - SARK 110 User Manual

Fra Self-resonant frequency of the capacitor
Z(Fop) Z at operating frequency
Z(Fra) Z at resonance frequency
Ca Equivalent capacitance at F = 1 MHz
Ra Equivalent resistance at the self-resonant frequency
The capacitor's parasitic inductance is calculated with the following equation:
1
=
La
π
× × ×
Ca 2 ( Fra
The quality factor is calculated using the following equation:
1
=
Qa
π
× × ×
2 ( Fop Ca

14.3 Quartz Crystal

This function determines the equivalent circuit model of quartz crystals. Detailed usage of this
function is described in the Application Note available at:
notes/equivalent-circuit-determination-of-quartz-crystals
The measurement procedure is as follows:
Select the file name and press [●] or
select [▲] when the results are not to be
saved in a file
Enter the frequency value, which should
be close to the expected resonant
frequency of the crystal
rd
Rev 1.2.6 October 3 , 2015
SARK SARK- - - - 110
SARK SARK
2
)
×
Ra )
- 59 -
110
110 110
http://www.sark110.com/application-
© Melchor Varela – EA4FRB 2011-2015
User's Manual