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TFS280G Filter specification
型号:   TFS280G
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描述:   Filter specification
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品牌   VECTRON [ Vectron International, Inc ]
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Filename: tfs280g.doc
version 1.6
16.10.2003
VI
TELEFILTER
Measurement condition
Ambient temperature:
Input power level:
Source and load impedance:
Terminating impedances *
Input:
Output:
22
0
50
275
162
2
Filter specification
TFS 280 G
1/5
C
dBm
|| -7,7 pF
|| -10,6 pF
Characteristics
Remark:
The reference level for the relative attenuation a rel of TFS280G is the minimum of the pass band attenuation amin. This value is defined as the
insertion loss ae. The centre frequency fc is the arithmetic mean value of the upper and lower frequencies at the 3 dB filter attenuation level
relative to the insertion loss a e. The given values for the relative attenuation arel and the group delay ripple have to be reached at the frequencies
given below, even if the centre frequency f c is shifted due to the temperature coefficient of frequency TCf in the operating temperature range and
due to a production tolerance for the centre frequency fc.
Data
Insertion loss
Nominal frequency
Centre frequency
Relative attenuation
f
N
-
f
N
+
f
N
+
20
10
32
40
MHz ... f
N
+
a e = amin
fN
fc
a rel
typ. value
11,3
-
280,0
MHz
dB
limit
max.
12
dB
280,0 MHz
-
20
MHz
MHz
MHz
MHz
0,8
41
38
41
dB
dB
dB
dB
max.
min.
min.
min.
1
40
37
40
dB
dB
dB
dB
MHz ... f
N
-
32
MHz ... f
N
+
40
MHz ... f
N
+ 220
Group delay ripple
GDR
f
N
17 MHz ... f
N
+ 17 MHz
Input power level
Operating temperature range
Storage temperature range
Temperature coefficient of frequency
TCf
38
-
-
-
-87
ns
max.
75
ns
dBm
max. + 10
- 40 C ... + 85 C
- 40 C ... + 85 C
ppm/K
-
*)
The terminating impedances depend on parasitics and q-values of matching elements and the board used, and are to be understood as
reference values only. Should there be additional questions, do not hesitate to ask for an application note or contact our design team.
**)
f(Hz) = TCf(ppm/K) x (T-T
0
) x fTo(MHz)
Generated:
Checked / approved:
Tele Filter GmbH
Potsdamer Straße 18
D 14 513 TELTOW / Germany
Tel: (+49) 3328 4784-0 / Fax: (+49) 3328 4784-30
E-Mail:
VI TELEFILTER reserves the right to make changes to the product(s) and/or information contained herein without notice. No liability is
assumed as a result of their use or application. No rights under any patent accompany the sale of any such product(s) or information.
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