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TFS246H4 Filter Specification
型号:   TFS246H4
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描述:   Filter Specification
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品牌   VECTRON [ Vectron International, Inc ]
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Filename: tfs246h4.doc
version 1.3
16.05.2002
VI
TELEFILTER
Measurement condition
Ambient temperature:
Input power level:
Terminating impedances
Input:
Output:
External coil:
23
0
*)
490
490
270
°C
dBm
|| -2.62 pF
|| -2.62 pF
nH
Filter Specification
TFS 246 H4
1/5
Characteristics
Remark:
Reference level for the relative attenuation arel of the TFS246H4 is the minimum of the pass band attenuation amin. The minimum of the pass
band attenuation amin 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 ae. The nominal frequency fN is fixed at 246 MHz without any tolerance. The given
values for the relative attenuation arel and for the group delay ripple have to be reached at the frequencies given below even if the centre
frequency fc 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
(Reference level)
Nominal frequency
Pass band ripple
fN - 85 kHz ... fN + 93 kHz
Relative attenuation
fN
fN ±
330
kHz ...
fN ±
400
kHz ...
fN ±
600
kHz ...
fN ±
800
kHz ...
fN ±
1,6 MHz ...
fN ±
3,0 MHz ...
fN ±
20
MHz ...
arel
ae = amin
fN
typ. value
2,5
-
0,5
±
±
±
±
±
±
±
±
120
400
600
800
1,6
3,0
20
100
kHz
kHz
kHz
MHz
MHz
MHz
MHz
MHz
1,5
22
33
41
47...55
52...55
54
55...70
0,5
0,8
1,2
-
-
TCf
**)
tolerance / limit
max
5
dB
dB
246,000 MHz
dB
dB
dB
dB
dB
dB
dB
dB
dB
µs
µs
µs
max
max
min
min
min
min
min
min
min
max
max
max
1,5
3
18
25
40
45
45
46
45
1,2
1,5
2,5
dB
dB
dB
dB
dB
dB
dB
dB
dB
µs
µs
µs
fN
fN
fN
fN
fN
fN
fN
fN
Group delay distortion
fN ±
50
kHz
fN ±
70
kHz
fN ±
100
kHz
GDD
Operating temperature range
Storage temperature range
Temperature coefficient of frequency
Frequency inversion temperature
T
0
- 25
°C
... + 85
°C
- 30
°C
... + 85
°C
-
-
- 0,036 ppm/K²
+ 25
°C
*) 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/
) x (T-T
0
)² x fTo(MHz)
Generated:
Checked / approved:
VI TELEFILTER
Vectron International, Inc.
Potsdamer Straße 18
267 Lowell Road
D 14 513 TELTOW / Germany
Hudson, NH 03051 / USA
Tel: (+49) 3328 4784-0 / Fax: (+49) 3328 4784-30
Tel: (603) 598-0070 Fax: (603) 598-0075
E-Mail:
vti@vtinh.com
E-Mail:
tft@telefilter.com
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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