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B3748 Datasheet(PDF) 3 Page - TDK Electronics

Part No. B3748
Description  SAW Components SAW filter Short range devices
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Maker  TDK [TDK Electronics]
Homepage  http://www.tdk.com
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B3748 Datasheet(HTML) 3 Page - TDK Electronics

 
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December 14, 2012
B3748
434.42 MHz
SAW Components
SAW filter
Data sheet
Please read
cautions and warnings and
important notes at the end of this document.
Characteristics
Temperature range for specification:
T
= –45 ˚C to +95 ˚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
434.42
MHz
Minimum insertion attenuation
α
min
incl. loss in matching elements (QL = 47)
1.9
2.6
dB
excl. loss in matching elements
1.5
2.2
dB
Pass band (relative to
α
min)
434.27 ...
434.57 MHz
0.6
2.0
dB
434.24 ...
434.60 MHz
0.8
3.0
dB
Relative attenuation (relative to
α
min)
α
rel
10.00 ...
380.00 MHz
55
60
dB
380.00 ...
414.00 MHz
50
56
dB
414.00 ...
422.00 MHz
46
52
dB
422.00 ...
427.00 MHz
40
48
dB
427.00 ...
432.92 MHz
24
29
dB
432.92 ...
433.60 MHz
13
20
dB
435.60 ...
445.00 MHz
25
29
dB
445.00 ...
450.00 MHz
40
46
dB
450.00 ...
810.00 MHz
45
54
dB
810.00 ... 1500.00 MHz
60
65
dB
1500.00 ... 2500.00 MHz
50
58
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
350 || 2.2
Ω || pF
Output: ZOUT =ROUT || COUT
350 || 2.2
Ω || pF


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