TFS398F Datasheet, PDF (1/5 Pages) Vectron International, Inc – Filter specification

Filename: tfs 398f.doc
VI TELEFILTER
Version 1.3
Filter specification
Measurement condition
Ambient temperature:
Input power level:
Terminating impedance: *
Input:
Output:
23
°C
0
dBm
380 Ω || -6,7 pF
370 Ω || -6,7 pF
TFS 398F
05.02.2007
1/5
Characteristics
Remark:
The reference level for the relative attenuation arel of the TFS 398F 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 1 dB
filter attenuation level relative to the insertion loss ae. The nominal frequency fN is fixed at 398 MHz without any tolerance. The given values for both the
relative attenuation arel and the group delay ripple have to be achieved 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
typ. value
tolerance / limit
Insertion loss
(reference level)
ae =amin
10
dB
max.
14 dB
Nominal frequency
Passband
Pass band ripple
f_N
PB
p-p
-
-
0,3 dB
f_N ±
max.
398,0
2,5
1
MHz
MHz
dB
Relative attenuation
f_N
f_N ±
f_N ±
... f_N ±
5
MHz ... f_N ±
6,5 MHz ... f_N ±
arel
2,5 MHz
6,5 MHz
50
MHz
0,5 dB
40
dB
43
dB
max.
min.
min.
1 dB
35 dB
40 dB
Group delay ripple within PB
45
ns
max.
60 ns
Operating temperature range
OTR
-
- 20 °C ... + 85°C
Storage temperature range
-
- 30 °C ... + 85°C
Frequency inversion temperature
28
°C
Temperature coefficient of frequency
TCf **
-0,036 ppm/K²
-
*) 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/K²) x (T-T₀)² x fTo(MHz)
Generated:
Checked / Approved:
Tele Filter GmbH
Potsdamer Straße 18
D 14 513 TELTOW / Germany
Tel: [phone] / Fax: [phone]
E-Mail: [e-mail]
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