
3
Apr 04, 2001
SAW Components
Low-Loss Filter
Data Sheet
Characteristics
Operating temperature:
Terminating source impedance:
Terminating load impedance:
B3650
260,0 MHz
T
A
= -20 C to 60 C
Z
S
= 200
and matching network
Z
L
= 200
and matching network
1)
Temperature dependance of f
c
: f
c
(T
A
) = f
c
(T
0
) (1 + TC
f
(T
A
-T
0
)
2
)
min.
259,93
typ.
260,0
max.
260,07 MHz
Centre frequency
f
C
Insertion attenuation at f
C
(including matching network, excluding 4:1 trans-
formers)
α
C
—
8,5
9,0
dB
Passband width
α
rel
≤
3,0 dB
α
rel
≤
20,0 dB
α
rel
≤
40,0 dB
B
3,0dB
1090
B
20dB
B
40dB
1130
1200
kHz
MHz
MHz
—
—
2,8
3,4
—
—
Absolute group delay
(at f
c
)
τ
—
0,8
—
μ
s
Group delay ripple
(p-p)
f
c
±
575 kHz
τ
—
160
250
ns
Relative attenuation
(relative to
α
c
)
f
c
50,0 MHz ... f
c
- 3,50 MHz
f
c
3,50 MHz ... f
c
- 2,70 MHz
f
c
2,70 MHz ... f
c
- 1,89 MHz
f
c
1,89 MHz ... f
c
- 1,06 MHz
f
c
+
1,06 MHz ... f
c
+ 1,89 MHz
f
c
+
1,89 MHz ... f
c
+ 2,70 MHz
f
c
+
2,70 MHz ... f
c
+ 3,50 MHz
f
c
+
3,50 MHz ... f
c
+ 16,0 MHz
f
c
+
16,0 MHz ... f
c
+ 25,0 MHz
f
c
+
25,0 MHz ... f
c
+ 50,0 MHz
α
rel
45
45
40
10
10
37
41
45
43
45
55
50
45
15
15
40
43
50
46
50
—
—
—
—
—
—
—
—
—
—
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
Temperature coefficient of frequency
1)
Turnover temperature
TC
f
T
0
—
—
– 0,036
25
—
—
ppm/K
2
C