X7255D 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 ˚C
Z_S = 50 Ω
Z_L = 2 kΩ || 3 pF
Insertion attenuation
Reference level for the
following data
α
36,00 MHz
min.
18,9
typ.
20,4
X 7255 D
36,00 MHz
max.
21,9 dB
Pass bandwidth
α_rel < 1,5 dB
α_rel < 3 dB
α_rel < 15 dB
α_rel < 30 dB
Relative attenuation
Adjacent picture carrier
Adjacent sound carrier
B_1,5dB
B_3dB
B_15dB
B_30dB
α_rel
30,75 MHz
40,25 MHz
40,75 MHz
41,00 MHz
41,25 MHz
—
—
—
—
36,0
14,0
36,0
32,0
36,0
7,1
7,4
8,4
8,8
41,0
18,0
50,0
44,0
51,0
— MHz
— MHz
— MHz
— MHz
— dB
— dB
— dB
— dB
— dB
Lower sidelobe
Upper sidelobe
25,00 ... 31,30 MHz
40,70 ... 45,00 MHz
32,0
37,0
33,0
38,0
— dB
— dB
Reflected wave signal suppression
1,2 µs ... 6,0 µs after main pulse
(test pulse 250 ns,
carrier frequency 36,00 MHz)
40,0
48,0
— dB
Feedthrough signal suppression
1,3 µs ... 1,2 µs before main pulse
(test pulse 250 ns,
carrier frequency 36,00 MHz)
—
56,0
— dB
Group delay ripple (p-p)
∆τ
32,40 ... 39,60 MHz
Impedance at 36,00 MHz
Input: Z_IN = R_IN || C_IN
Output: Z_OUT = R_OUT || C_OUT
Temperature coefficient of frequency
TC_f
—
50
— ns
—
1,7 ||18,1 — kΩ || pF
—
2,0 || 4,8
— kΩ || pF
—
–72
— ppm/K
3 Dec 08, 2003