B3570 Datasheet, PDF (4/7 Pages) EPCOS – SAW Components Low-loss Filter 868,30 MHz

SAW Components
Low-loss Filter
Data Sheet
Characteristics
Reference temperature:
Terminating source impedance:
Terminating load impedance:
Center frequency
(center frequency between 3 dB points)
B3570
868,30 MHz
T_A = –45 ... 90 ˚C
Z_S = 50 Ω and matching network
Z_L = 50 Ω and matching network
min.
typ.
max.
f_C
—
868,30
— MHz
Minimum insertion attenuation
α_min
868,00 ... 868,78 MHz
—
2,7
4,7 dB
Pass band (relative to α_min)
868,00 ... 868,60 MHz
867,90 ... 868,70 MHz
—
1,0
3,0 dB
—
1,5
6,0 dB
Relative attenuation (relative to α_min)
α_rel
10,00 ... 700,00 MHz
50
55
— dB
700,00 ... 830,00 MHz
35
45
— dB
830,00 ... 850,00 MHz
32
40
— dB
850,00 ... 865,02 MHz
25
30
— dB
871,00 ... 874,50 MHz
11
16
— dB
874,50 ... 883,00 MHz
22
27
— dB
883,00 ... 900,00 MHz
30
35
— dB
900,00 ...1000,00 MHz
35
40
— dB
Impedance for pass band matching ²⁾
Input: Z_IN = R_IN || C_IN
Output: Z_OUT = R_OUT || C_OUT
— 216 || 2,20 — Ω || pF
— ^{222 || 2,20} — Ω || pF
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.
4 May 09, 2001