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參數(shù)資料
| 型號(hào)： | K7257M |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | SAW Components |
| 中文描述： | 聲表面波元件 |
| 文件頁數(shù)： | 4/9頁 |
| 文件大?。?/td> | 134K |
| 代理商： | K7257M |
4
Jan 27, 2003
SAW Components
IF Filter for Video / Multistandard Applications
Data Sheet
K 7257 M
33,90 MHz and 38,90 MHz
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
Z
L
= 2 k
|| 3 pF
min.
typ.
max.
Insertion attenuation
Reference level for the
following data
α
37,40 MHz
14,8
16,3
17,8
dB
Relative attenuation
Picture carrier
Color carrier
Sound carrier
Adjacent picture carrier
Adjacent sound carrier
Lower sidelobe
Upper sidelobe
α
rel
38,90 MHz
35,32 MHz
34,40 MHz
32,90 MHz
40,40 MHz
5,4
1,6
28,0
37,0
40,0
36,0
32,0
6,4
2,6
39,0
45,0
48,0
44,0
38,0
7,4
3,6
—
—
—
—
—
dB
dB
dB
dB
dB
dB
25,00 ... 32,90 MHz
40,40 ... 45,00 MHz
Reflected wave signal suppression
1,3
μ
s ... 6,0
μ
s after main pulse
(test pulse 250 ns,
carrier frequency 37,40 MHz)
42,0
52,0
—
dB
Feedthrough signal suppression
1,3
μ
s ... 1,2
μ
s 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
—
50
—
ns
Impedance
at 37,40 MHz
Input:
Output: Z
OUT
= R
OUT
|| C
OUT
Z
IN
= R
IN
|| C
IN
—
—
1,3||19,5
1,8|| 4,2
—
—
k
|| pF
k
|| pF
Temperature coefficient of frequency
TC
f
—
–72
—
ppm/K
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