B39389-K7257-M100 Просмотр технического описания (PDF) - EPCOS AG
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B39389-K7257-M100 Datasheet PDF : 9 Pages
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SAW Components
K 7257 M
IF Filter for Video / Multistandard Applications
33,90 MHz and 38,90 MHz
Data Sheet
Characteristics in M/N mode (switching input 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
37,40 MHz
min.
14,8
typ.
16,3
max.
17,8 dB
Relative attenuation
Picture carrier
Color carrier
Sound carrier
Adjacent picture carrier
Adjacent sound carrier
Lower sidelobe
Upper sidelobe
25,00
40,40
αrel
38,90 MHz
35,32 MHz
34,40 MHz
32,90 MHz
40,40 MHz
... 32,90 MHz
... 45,00 MHz
5,4
6,4
1,6
2,6
28,0
39,0
37,0
45,0
40,0
48,0
36,0
44,0
32,0
38,0
7,4 dB
3,6
— dB
— dB
— dB
— dB
— dB
Reflected wave signal suppression
1,3 µs ... 6,0 µs after main pulse
(test pulse 250 ns,
carrier frequency 37,40 MHz)
42,0
52,0
— dB
Feedthrough signal suppression
1,3 µs ... 1,2 µs before main pulse
(test pulse 250 ns,
carrier frequency 37,40 MHz)
—
50,0
— dB
Group delay ripple (p-p)
∆τ
35,32 ... 38,90 MHz
Impedance at 37,40 MHz
Input: ZIN = RIN || CIN
Output: ZOUT = ROUT || COUT
Temperature coefficient of frequency
TCf
—
50
— ns
—
1,3 ||19,5
— kΩ || pF
—
1,8 || 4,2
— kΩ || pF
—
–72
— ppm/K
4 Jan 27, 2003
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