K7257M Datasheet, PDF (4/9 Pages) List of Unclassifed Manufacturers – SAW Components

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:
T_A = 25 ˚C
Z_S = 50 Ω
Z_L = 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
α_rel
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: Z_IN = R_IN || C_IN
Output: Z_OUT = R_OUT || C_OUT
Temperature coefficient of frequency
TC_f
—
50
— ns
—
1,3 ||19,5
— kΩ || pF
—
1,8 || 4,2
— kΩ || pF
—
–72
— ppm/K
4 Jan 27, 2003