X6940D Datasheet, PDF (3/6 Pages) EPCOS – SAW Components Bandpass Filter

SAW Components
X 6940 D
Bandpass Filter
57,00 MHz
Data Sheet
Characteristics
Reference temperature:
Terminating source impedance:
Terminating load impedance:
T_A = 25 (45) ˚C
Z_S = 50 Ω
Z_L = 2 kΩ || 3 pF and matching network
min.
typ.
max.
Insertion attenuation
Reference level for the
α
57,02 (57,00) MHz
13,1
14,6
16,1 dB
following data
Amplitude ripple (p-p)
∆α
54,52 ... 59,02 (54,50 ... 59,00) MHz
—
0,5
— dB
Relative attenuation
α_rel
52,77 (52,75) MHz
54,12 (54,10) MHz
59,52 (59,50) MHz
60,27 (60,25) MHz
62,40 (62,38) MHz
64,77 (64,75) MHz
Lower sidelobe
45,02 ... 50,02 (45,00 ... 50,00) MHz
50,02 ... 52,77 (50,00 ... 52,75) MHz
Upper sidelobe
62,40 ... 70,02 (62,38 ... 70,00) MHz
Reflected wave signal suppression
1,5 µs ... 6,0 µs after main pulse
(test pulse 250 ns, carrier frequency 57,02 MHz)
38,0
44,0
1,6
2,8
1,9
3,1
30,0
38,0
41,0
47,0
43,0
49,0
38,0
43,0
34,0
39,0
36,0
42,0
42,0
52,0
— dB
4,0 dB
4,3 dB
— dB
— dB
— dB
— dB
— dB
— dB
— dB
Group delay ripple (p-p)
∆τ
54,52 ... 59,02 (54,50 ... 59,00) MHz
—
40
— ns
Impedance at 57,02 MHz
Input: Z_IN = R_IN || C_IN
Output: Z_OUT = R_OUT || C_OUT
—
1,3||23,5 — kΩ || pF
—
4,0|| 6,3 _{— kΩ || pF}
Temperature coefficient of frequency
TC_f
—
–18
— ppm/K
Matching network:
L_p1 = 820 nH
3 May 18, 2005