3 Mar 03, 2004
SAW Components R 770
433,81 / 434,06 MHzResonator
Data Sheet
Characteristics Resonator 1
Reference temperature:
T
A
= 25 ˚C
Terminating source impedance:
Z
S
= 50 Ω
Terminating Load impedance:
Z
L
= 50 Ω
min. typ. max.
Center frequency Resonator 1
1)
1) Center frequency is defined as the maximum of the real part of the admittance.
f
c
433,76 433,81 433,86 MHz
Frequency offset Resonator 2 to Resonator 1
f
offset
200,0 250,0 300,0 KHz
Minimum insertion attenuation α
min
— 1,3 1,7 dB
Unloaded quality factor
Q
U
7500 10100 —
Ageing of
f
c
——± 50 ppm
Equivalent circuit elements
Motional capacitance
C
1
— 2,12 — fF
Motional inductance
L
1
— 63,43 — µH
Motional resistance
R
1
—1723Ω
Parallel capacitance
2)
2) If used in two port configuration (pin 1-input, pin 7-output)
C
0
is reduced by approx. 0,3 pF.
C
01
— 2,4 — pF
Temperature coefficient of frequency
3)
3) Temperature dependence of
f
c
:
f
c
(
T
A
) =
f
c
(
T
0
)(1 +
TC
f
(
T
A
–
T
0
)
2
)
TC
f
— – 0,03 — ppm/K
2
Turnover temperature
T
0
5—35˚C
