K3958M Datasheet, PDF (3/6 Pages) EPCOS – IF Filter for Video Applications

SAW Components
IF Filter for Video Applications
Data Sheet
Characteristics
Reference temperature:
Terminating source impedance:
Terminating load impedance:
K 3958 M
33,90 MHz and 38,90 MHz
T_A = 25 (45) ˚C
Z_S = 50 Ω
Z_L = 2 kΩ || 3 pF
Insertion attenuation
Reference level for the
following data
α
37,45 (37,40) MHz
min.
typ.
max.
13,5
15,0
16,5 dB
Relative attenuation
Picture carrier
α_rel
38,95 (38,90) MHz
33,95 (33,90) MHz
Color carrier
34,52 (34,47) MHz
Sound carrier
32,45 (32,40) MHz
32,95 (32,90) MHz
33,45 (33,40) MHz
Adjacent picture carrier
30,95 (30,90) MHz
31,95 (31,90) MHz
Adjacent sound carrier
40,45 (40,40) MHz
40,20 (40,15) MHz
40,95 (40,90) MHz
41,45 (41,40) MHz
Lower sidelobe
25,05 ... 31,95 (25,00 ... 31,90) MHz
Upper sidelobe
40,45 ... 45,05 (40,40 ... 45,00) MHz
5,0
6,0
4,8
5,8
-0,4
0,6
—
57,0
—
58,0
16,0
18,2
47,0
60,0
47,0
55,0
46,0
60,0
42,0
52,0
43,0
51,0
45,0
60,0
42,0
48,0
38,0
45,0
7,0 dB
6,8 dB
1,6 dB
— dB
— dB
— dB
— 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 37,45 MHz)
42,0
52,0
— dB
Feedthrough signal suppression
1,0 µs ... 0,9 µs before main pulse
(test pulse 250 ns, carrier frequency 37,45 MHz)
50,0
56,0
— dB
Group delay ripple (p-p, aperture 50 kHz)
∆τ
33,95 ... 38,95 (33,90 ... 38,90) MHz
Impedance at 37,45 MHz
Input: Z_IN = R_IN || C_IN
Output: Z_OUT = R_OUT || C_OUT
Temperature coefficient of frequency
TC_f
—
40
— ns
—
2,2 ||10,8 — kΩ || pF
—
1,9 || 3,9
— kΩ || pF
—
–72
— ppm/K
3 Mar 31, 2006