SAW Components
SAW filter
Data sheet
Characteristics
Temperature range for specification:
Terminating source impedance:
Terminating load impedance:
T = –45 ˚C to +95 ˚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 (Q
L
= 47)
excl. loss in matching elements
Pass band (relative to
α
min
)
433.77 ... 434.07 MHz
433.75 ... 434.09 MHz
Relative attenuation (relative to
α
min
)
α
rel
10.00 ... 380.00 MHz
380.00 ... 414.00 MHz
414.00 ... 427.00 MHz
427.00 ... 431.52 MHz
431.52 ... 432.90 MHz
432.90 ... 433.10 MHz
435.10 ... 444.50 MHz
444.50 ... 450.00 MHz
450.00 ... 810.00 MHz
810.00 ... 1500.00 MHz
1500.00 ... 2500.00 MHz
Impedance
for pass band matching
1)
Input: Z
IN
= R
IN
|| C
IN
Output: Z
OUT
= R
OUT
|| C
OUT
1)
B3743
433.92 MHz
f
C
α
min
—
typ.
@ 25 ˚C
433.92
max.
—
MHz
—
—
1.9
1.5
2.6
2.2
dB
dB
—
—
0.5
0.8
2.0
3.0
dB
dB
55
50
46
24
15
13
25
40
47
60
50
60
56
52
29
20
20
30
45
52
65
55
—
—
—
—
—
—
—
—
—
—
—
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
—
—
350 || 2.2
350 || 2.2
—
—
Ω
|| pF
Ω
|| pF
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.
Please read
cautions and warnings and
important notes
at the end of this document.
3
December 16, 2009
EPCOS [ EPCOS ]
