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SAW Components
SAW resonator
Data sheet
Characteristics
Reference temperature:
Terminating source impedance:
Terminating load impedance:
T A = 25 ?C
Z S = 50 ?
Z L = 50 ?
R1921
315.00 MHz
min.
typ.
max.
Center
frequency 1)
f C
314.975
315.000
315.025
MHz
Minimum insertion attenuation
Unloaded quality factor
Ageing of f C
α min
Q U
—
7000
—
1.5
9800
—
2.0
—
–50/+50
dB
ppm
Equivalent circuit elements
Motional capacitance
Motional inductance
Motional resistance
Parallel capacitance 2)
C 1
L 1
R 1
C 0
—
—
—
—
2.455
104.0
21
3.6
—
—
30
—
fF
μ H
?
pF
Temperature coefficient of frequency 3) TC f
—
–0.032
—
ppm/K 2
Turnover temperature
T 0
10
—
30
?C
1)
2)
3)
Center frequency is defined as maximum of the real part of the admittance.
If used in two port configuration (pin 2 - input, pin 5 - output) C 0 is reduced by approx. 0.3 pF.
Temperature dependence of f C : f C (T A ) = f C (T 0 ) (1 + TC f (T A – T 0 ) 2 )
Maximum ratings
Operable temperature range
Storage temperature range
DC voltage
Source power
T
T stg
V DC
P S
–45/+125
–45/+125
12
0
?C
?C
V
dBm
Please read cautions and warnings and
important notes at the end of this document.
3
May 19, 2011
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