B39301-B3553-U310 Просмотр технического описания (PDF) - EPCOS AG
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B39301-B3553-U310 Datasheet PDF : 6 Pages
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SAW Components
Low-loss Filter
Data Sheet
Characteristics
Reference temperature:
Terminating source impedance:
Terminating load impedance:
Center frequency
(center frequency between 3 dB points)
B3553
303,80 MHz
TA = 25 ˚C
ZS = 50 Ω and matching network
ZL = 50 Ω and matching network
min.
typ.
max.
fC
—
303,80
— MHz
Minimum insertion attenuation
αmin
303,62 ... 303,98 MHz
—
3,0
4,5 dB
Pass band (relative to αmin)
303,62 ... 303,98 MHz
303,595 ... 304,005MHz
303,53 ... 304,07 MHz
—
1,0
2,0 dB
—
1,0
3,0 dB
—
1,5
6,0 dB
Relative attenuation (relative to αmin)
αrel
10,00 ... 260,00 MHz
45
50
— dB
260,00 ... 297,00 MHz
40
45
— dB
297,00 ... 302,80 MHz
15
20
— dB
304,80 ... 320,00 MHz
10
15
— dB
320,00 ... 400,00 MHz
35
40
— dB
400,00 ...1000,00 MHz
45
50
— dB
Impedance for pass band matching 2)
Input: ZIN = RIN || CIN
Output: ZOUT = ROUT || COUT
Temperature coefficient of frequency 1)
TCf
Frequency inversion point
T0
— 570 || 4,5 — Ω || pF
— 570 || 3,7 — Ω || pF
—
–0,03
— ppm/K2
10
—
30 °C
1)Temperature dependence of fC: fC(TA) = fC(T0) (1 + TCf(TA – T0)2)
2) Impedance for passband matching bases on an ideal, perfect matching of the SAW filter to
source- and to load impedance (here 50 Ohm). After the SAW filter is removed and input imped-
ance into the input matching / output matching network is calculated.
The conjugate complex value of these characteristic impedances are the input and output imped-
ances for flat passband. For more details, we refer to EPCOS application note #4.
3 May 09, 2001
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