CSBFB900KJ58-R1 Murata, CSBFB900KJ58-R1 Datasheet - Page 14

• Manufacturer Part Number: CSBFB900KJ58-R1
• Manufacturer: Murata

Specifications of CSBFB900KJ58-R1

• Lead Free Status / RoHS Status: Compliant

2
Note
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• This PDF catalog has only typical specifications because there is no space for detailed specifications. Therefore, please approve our product specifications or transact the approval sheet for product specifications before ordering.
sales representatives or product engineers before ordering.
12
2
(Note 1)
The relationship between the size of the resonator
and the resonant frequency is described as follows.
For example, the frequency doubles if the thickness
doubles, when thickness vibration is used.
The following relationship is obtained when the
length of the resonators is r , the resonance
frequency is Fr, the speed of sound waves travelling
through piezoelectric ceramics, and the wavelength
is .
As seen in the above formula, the frequency
constant determines the size of the resonator.
Principles of CERALOCK
Notes
Fr·r = Const.
(frequency constant, Fr·t for the thickness)
C = Fr· = 2Fr·r
= 2r
(Min.Amplitude) (Max.Amplitude)
Amplitude
Range of
Standing
Wave
r= / 2
Fig. 1 1
®
(Note 2)
In Fig. 2-3, when resistance R
simplification, the impedance Z ( ) between two
terminals is expressed by the following formula.
Therefore from
Fr = r/2 =
Fa = a/2 =
Z ( ) =
When
When
=
j ( L
1 +
j C
j C
=
=
1
1
2
2
0
0
L
C
C
C
1
1 –
1
0
( j L
+ ( j L
0
1
C
C
1
L
C
1
1
=2 F,
L
1
–
0
1
= r, Z ( r) =0
C
C
L
1
1
C
1
1
Fig. 2 2
/(C
1
+
1
1
2
1
L
1
j C
+
)
C
C
0+
1
0
/(C
1
0
j C
C
L
C
1
1
1
1
0
1
1
)
+C
)
1
is omitted for
= a, Z ( a) =
)
1
)
= Fr
1+
C
C
1
0
P17E.pdf
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