TFS188A_05 Datasheet, PDF (1/5 Pages) Vectron International, Inc – Filter specification

Filename: tfs 188a.doc
VI TELEFILTER
Version 1.3
Filter specification
TFS 188A
12.05.2005
1/5
Measurement condition
Ambient temperature:
Input power level:
Terminating impedances at fc: *
25 °C ± 2°C
0 dBm
input:
1076 Ω ⎟⎢ - 5,8 pF
output:
831 Ω ⎟⎢ - 6,6 pF
Characteristics
Remark:
The reference level for the relative attenuation arel of TFS 188A 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 ae. 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 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
ae
(reference level)
4,8 dB
max. 6
dB
Nominal frequency
f_N
Centre frequency
f_C
-
188 MHz
188
MHz
-
Relative attenuation
arel
f_N
.......
f_N ± 0,06
f_N ± 0,06 MHz ....... f_N ± 0,12
f_N ± 0,8
f_N ± 1,6
f_N ± 3,2
MHz ....... f_N ± 1,6
MHz ....... f_N ± 3,2
MHz ....... f_N ± 10
MHz
MHz
MHz
MHz
MHz
0,15 dB
0,8 dB
38 dB
43 dB
47 dB
max. 0,29 dB
max. 3
dB
min. 35
dB
min. 36
dB
min. 40
dB
Absolute group delay at f_N
Group delay variation in f_N ± 0,12 MHz
1,5 µs
120 ns
max. 5
µs
max. 250
ns
Temperature coefficient of frequency Tc_f **
- 0,04 ppm/K²
-
Operating temperature range
-
- 25 °C ... + 75 °C
Storage temperature range
-
- 40 °C ... + 85 °C
Frequency inversion temperature T₀
35 °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/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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