SAW Components
SAW filter
Data sheet
Characteristics
Temperature range for specification:
Terminating source impedance:
Terminating load impedance:
T = –40 ˚C to +105 ˚C
Z
S
=
50
Ω
and matching network
Z
L
=
50
Ω
and matching network
min.
Center frequency
Minimum insertion attenuation
incl. loss in matching elements
excl. loss in matching elements
Pass band (relative to
α
min
)
433.645 ... 434.165MHz
433.645 ... 434.195MHz
Filter bandwidth
α
rel
≤ 3
dB
Relative attenuation (relative to
α
min
)
α
rel
10.00 ... 414.00 MHz
414.00 ... 425.00 MHz
425.00 ... 431.50 MHz
431.50 ... 433.00 MHz
434.92 ... 443.00 MHz
443.00 ... 530.00 MHz
530.00 ... 670.00 MHz
670.00 ... 830.00 MHz
830.00 ... 1000.00 MHz
1000.00 ... 2500.00 MHz
Impedance
for pass band matching
2)
Input: Z
IN
= R
IN
|| C
IN
Output: Z
OUT
= R
OUT
|| C
OUT
1)
2)
B3780
433.92 MHz
f
C
α
min
—
typ.
@ 25 ˚C
433.92
max.
—
MHz
—
—
2.0
1.6
2.8
2.4
dB
dB
—
—
780
0.9
0.9
850
3.0
4.5
1)
920
dB
dB
kHz
48
42
28
18
14
36
55
45
60
43
53
47
33
21
18
41
60
50
65
48
—
—
—
—
—
—
—
—
—
—
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
—
—
330 || 1.9
330 || 1.9
—
—
Ω
|| pF
Ω
|| pF
3.0dB for –40
˚C
to +85
˚C
Impedance for passband matching bases on an ideal, perfect matching of the SAW filter to source- and to load
impedance (here 50 Ohm). After removal of the SAW filter the input impedance of the input and output match-
ing network is calculated. The conjugate complex value of these characteristic impedances are the input and
output impedances for flat passband. For more details we refer to EPCOS application note #4.
Maximum ratings
Operable temperature range
Storage temperature range
DC voltage
Source power
T
T
stg
V
DC
P
S
–45/+125
–45/+125
6
10
˚C
˚C
V
dBm
source impedance 50
Ω
Please read
cautions and warnings and
important notes
at the end of this document.
3
July 24, 2008
EPCOS [ EPCOS ]
