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SAW Components
Resonator
Data Sheet
Characteristics Resonator 2
Reference temperature:
Terminating source impedance:
Terminating Load impedance:
T A = 25 ?C
Z S = 50 ?
Z L = 50 ?
R 771
314,875 / 315,125 MHz
min.
typ.
max.
Center frequency Resonator
2 1)
f c
315,075
315,125
315,175 MHz
Frequency offset Resonator 2 to Resonator 1 f offset
200,0
250,0
300,0
KHz
Minimum insertion attenuation
Unloaded quality factor
Ageing of f c
α min
Q U
—
9600
—
1,3
13200
—
1,6
—
± 50
dB
ppm
Equivalent circuit elements
Motional capacitance
Motional inductance
Motional resistance
Parallel capacitance 2)
Temperature coefficient of frequency 3)
Turnover temperature
C 2
L 2
R 2
C 02
TC f
T 0
—
—
—
—
—
0
2,38
107,32
16
3,1
– 0,03
—
—
—
22
—
—
30
fF
μ H
?
pF
ppm/K 2
?C
1) Center frequency is defined as the maximum of the real part of the admittance.
2) If used in two port configuration (pin 3-input, pin 5-output) C 0 is reduced by approx. 0,3 pF.
3) Temperature dependence of f c : f c (T A ) = f c (T 0 )(1 + TC f (T A – T 0 ) 2 )
4
Mar 03, 2004
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