X7256D Datasheet, PDF (3/9 Pages) EPCOS – SAW Components Bandpass Filter

SAW Components
Bandpass Filter
Data Sheet
Characteristics of channel 1 (switching pin 2 connected to ground)
Reference temperature:
Terminating source impedance:
Terminating load impedance:
T_A = 25 (45) ˚C
Z_S = 50 Ω
Z_L = 2 kΩ || 3 pF|| 3 pF
Insertion attenuation
Reference level for the
following data
α
57,08 (57,00) MHz
min.
typ.
12,0
13,5
X 7256 D
57,00 MHz
max.
15,0 dB
Pass bandwidth
α_rel ≤3 dB
α_rel ≤30 dB
B_3dB
—
B_30dB
—
Relative attenuation
α_rel
54,53 (54,45) MHz
–0,9
59,53 (59,45) MHz
–1,0
54,03 (53,95) MHz
—
60,03 (59,95) MHz
—
60,39 (60,31) MHz
—
Lower sidelobe
45,08 ... 52,08 (45,00 ... 52,00) MHz
36,0
52,08 ... 53,03 (52,00 ... 52,95) MHz
38,0
Upper sidelobe
60,88 ... 62,58 (60,80 ... 62,50) MHz
28,0
62,58 ... 65,08 (62,50 ... 65,00) MHz
37,0
6,0
7,5
0,1
0,0
3,1
2,8
11,0
44,0
46,0
34,0
43,0
— MHz
— MHz
1,1 dB
1,0 dB
— dB
— dB
— dB
— dB
— dB
— dB
— dB
Reflected wave signal suppression
1,2 µs ... 6,0 µs after main pulse
(test pulse 250 ns, carrier frequency 57,08 MHz)
42,0
52,0
— dB
Feedthrough signal suppression
1,3 µs ... 1,2 µs before main pulse
(test pulse 250 ns, carrier frequency 57,08 MHz)
—
50,0
— dB
Group delay ripple (p-p)
∆τ
54,53 ... 59,53 (54,45 ... 59,45) MHz
Impedance at 57,08 MHz
Input: Z_IN = R_IN || C_IN
Output: Z_OUT = R_OUT || C_OUT
Temperature coefficient of frequency
TC_f
—
60
— ns
—
0,4||19,0
— kΩ || pF
—
0,6|| 6,0
— kΩ || pF
—
–72
— ppm/K
3 Jan 05, 2005