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X7255D Datasheet, PDF (4/9 Pages) EPCOS – SAW Components Bandpass Filter
SAW Components
Bandpass Filter
Data Sheet
Characteristics of channel 2 (switching pin 2 connected to pin 1)
Reference temperature:
Terminating source impedance:
Terminating load impedance:
TA = 25 ˚C
ZS = 50 Ω
ZL = 2 kΩ || 3 pF
Insertion attenuation
Reference level for the
following data
α
36,00 MHz
min.
19,4
typ.
20,9
X 7255 D
36,00 MHz
max.
22,4 dB
Pass bandwidth
αrel < 1,5 dB
αrel < 3 dB
αrel < 15 dB
αrel < 30 dB
Relative attenuation
Adjacent picture carrier
Adjacent sound carrier
B1,5dB
B3dB
B15dB
B30dB
αrel
31,42 MHz
39,67 MHz
39,92 MHz
Lower sidelobe
Upper sidelobe
25,00 ... 31,80 MHz
40,20 ... 45,00 MHz
Reflected wave signal suppression
1,2 µs ... 6,0 µs after main pulse
(test pulse 250 ns,
carrier frequency 36,00 MHz)
Feedthrough signal suppression
1,3 µs ... 1,2 µs before main pulse
(test pulse 250 ns,
carrier frequency 36,00 MHz)
Group delay ripple (p-p)
∆τ
32,90 ... 39,10 MHz
Impedance at 36,00 MHz
Input: ZIN = RIN || CIN
Output: ZOUT = ROUT || COUT
Temperature coefficient of frequency
TCf
—
6,2
—
6,4
—
7,4
—
7,8
35,0
42,0
11,0
15,0
24,0
30,0
34,0
40,0
32,0
37,0
40,0
50,0
—
50,0
—
50
— 1,9 ||20,3
—
2,0 || 4,8
—
–72
— MHz
— MHz
— MHz
— MHz
— dB
— dB
— dB
— dB
— dB
— dB
— dB
— ns
— kΩ || pF
— kΩ || pF
— ppm/K
4 Dec 08, 2003