
3
Dec 15, 1999
SAW Components
Low-loss Filter
Data Sheet
B3554
447,725 MHz
Characteristics
Reference temperature:
Terminating source impedance:
Terminating load impedance:
T
A
= 25 C
Z
S
= 50
and matching network
Z
L
= 50
and matching network
1)
Temperature dependence of f
C
: f
C
(T
A
) =
f
C
(T
0
) (1 + TC
f
(T
A
– T
0
)
2
)
min.
—
typ.
max.
—
Center frequency
(center frequency between 3 dB points)
f
C
447,725
MHz
Minimum insertion attenuation
α
min
447,605 ...447,925 MHz
—
2,2
4,0
dB
Pass band
(relative to
α
min
)
447,605 ...447,925MHz
447,585 ...447,945MHz
447,545 ...447,985MHz
—
—
—
1,0
1,0
1,5
3,0
4,0
6,0
dB
dB
dB
Relative attenuation
(relative to
α
min
)
α
rel
10,00 ... 420,00 MHz
420,00 ... 441,50 MHz
441,50 ... 446,77 MHz
448,77 ... 455,50 MHz
455,50 ... 475,00 MHz
475,00 ...1000,00 MHz
40
30
15
10
30
35
50
39
32
28
38
45
—
—
—
—
—
—
dB
dB
dB
dB
dB
dB
Impedance
for pass band matching
Input:
Output: Z
OUT
= R
OUT
|| C
OUT
Z
IN
= R
IN
|| C
IN
—
—
280 || 2,67
290 ||3,20
—
—
|| pF
|| pF
ppm/K
2
Temperature coefficient of frequency
1)
TC
f
T
0
—
–0,03
—
Frequency inversion point
10
—
30
°
C