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B3773 Datasheet(PDF) 3 Page - EPCOS

Part No. B3773
Description  SAW filter 868.95 MHz
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Manufacturer  EPCOS [EPCOS]
Direct Link  http://www.epcos.com
Logo EPCOS - EPCOS

B3773 Datasheet(HTML) 3 Page - EPCOS

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January 25, 2006
B3773
868.95 MHz
SAW Components
SAW filter
Data sheet
Please read
cautions and warnings and
important notes at the end of this document.
Characteristics
Operating temperature range:
T
= –45 ˚C to +120 ˚C
Terminating source impedance:
ZS =50 Ω and matching network
Terminating load impedance:
ZL =50 Ω and matching network
min.
typ.
@ 25 ˚C
max.
Center frequency
fC
868.95
MHz
Minimum insertion attenuation
α
min
incl. loss in matching elements (QL = 47)
3.0
3.7
dB
excl. loss in matching elements
2.5
3.2
dB
Pass band (relative to
α
min)
868.80 ...
869.10 MHz
0.5
2.0
dB
868.70 ...
869.20 MHz
1.1
3.0
dB
Filter bandwidth
α
rel ≤ 3 dB
1.25
1.35
1.45
MHz
Relative attenuation (relative to
α
min)
α
rel
10.00 ...
850.00 MHz
55
59
dB
850.00 ...
858.00 MHz
50
55
dB
858.00 ...
866.15 MHz
30
35
dB
871.65 ...
880.00 MHz
23
27
dB
880.00 ...
890.00 MHz
40
47
dB
890.00 ... 1000.00 MHz
55
59
dB
Impedance for pass band matching1)
1)
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.
Input:
ZIN
=
RIN
||
CIN
270 || 1.0
Ω || pF
Output:
ZOUT = ROUT || COUT
270 || 1.0
Ω || pF


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