TFS408 Datasheet, PDF (1/5 Pages) Vectron International, Inc – Filter specification

Filename: tfs 408.doc
VI TELEFILTER
Version 1.5
Filter specification
TFS 408
11.04.2005
1/5
Measurement condition
Ambient temperature:
Input power level:
Terminating impedances *
for input:
for output:
Coupling coil:
23 °C
0 dBm
790 Ohm || - 1.45 pF
790 Ohm || - 1.45 pF
100 nH
Characteristics
Remark:
Reference level for the relative attenuation arel of the TFS 408 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 408,0 MHz without 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
typ. value
tolerance / limit
Insertion loss in OTR
Insertion loss in ROTR
ae
3,7 dB
3,7 dB
max.
max.
5,5 dB
5,0 dB
Nominal frequency
Centre frequency
f_N
-
f_C
408,035 MHz
408,0 MHz
-
Relative attenuation
f_N
f_N ± 100
... f_N ±
kHz ... f_N ±
f_N ±
f_N ±
f_N +
500
700
0,3
4,8
kHz ... f_N ±
kHz ... f_N ±
MHz ... f_N -
MHz ...
100
150
700
4,8
4,8
800
arel
kHz
kHz
kHz
MHz
MHz
MHz
0,4 dB
2
dB
30
dB
44
dB
53
dB
55
dB
max.
max.
min.
min.
min.
min.
1,5 dB **
3 dB
25 dB
40 dB
45 dB
45 dB
Group delay ripple
f_N ± 150
kHz
1
µs
max.
2 µs
Input power level
****
-
max.
10 dBm
Operating temperature range
OTR
-
- 40°C ... + 85 °C
Reduced operating temperature range
ROTR
-
0°C ... + 50 °C
Storage temperature range
-
- 55°C ... + 125 °C
Frequency inversion temperature
T₀ ***
28
°C
-
Temperature coefficient of frequency
TCf ***
-0,038 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.
**) 1 dB in reduced operating temperature range
***) ∆f(Hz) = TCf(ppm/K) x (T-T₀)² x fTo(MHz).
****) also guaranteed 15 dBm for 1 minute over lifetime of filter
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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