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SAW Components
SAW filter
Data sheet
Characteristics
Temperature range for specification:
Terminating source impedance:
Terminating load impedance:
T = –40 ?C to +90 ?C
Z S = 50 ? and matching network
Z L = 50 ? and matching network
B3933
433.92 MHz
min.
typ.
@ 25 ?C
max.
Center frequency
f C
—
433.92
—
MHz
Minimum insertion attenuation
α min
incl. loss in matching elements (Q L = 47)
excl. loss in matching elements
—
—
3.1
2.6
3.8
3.3
dB
dB
Pass band (relative to α min )
433.860 ... 433.980MHz
433.845 ... 433.995MHz
—
—
0.3
0.5
2.0 1)
3.0
dB
dB
Relative attenuation (relative to α min )
α rel
10.00 ... 414.00 MHz
414.00 ... 427.00 MHz
427.00 ... 431.52 MHz
431.52 ... 433.12 MHz
433.12 ... 433.32 MHz
434.52 ... 434.72 MHz
434.72 ... 443.00 MHz
443.00 ... 450.00 MHz
450.00 ... 810.00 MHz
810.00 ... 2000.00 MHz
2000.00 ... 2500.00 MHz
55
48
32
28
20
20
25
35
47
60
52
60
53
36
35
28
24
30
42
53
65
57
—
—
—
—
—
—
—
—
—
—
—
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
Impedance for pass band matching 2)
Input: Z IN
= R IN
|| C IN
—
230 || 2.2
—
? || pF
Output: Z OUT = R OUT || C OUT
—
230 || 2.2
—
? || pF
1)
2)
1.5 dB for –30 ?C to +80?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.
Please read cautions and warnings and
important notes at the end of this document.
3
December 17, 2012
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