TFS912 Datasheet, PDF (1/5 Pages) Vectron International, Inc – Filter Specification

Tfs912.doc
VI TELEFILTER
version 1.2
Filter Specification
TFS 912
02.07.2002
1/5
Measurement condition
Ambient temperature:
23
°C
Input power level:
0
dBm
Terminating impedances*
for input: 190 Ω // -0.15 pF
for output: 190 Ω // -0.15 pF
Characteristics
Remark:
Reference level for the relative attenuation arel of the TFS 912 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 912,5 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
(Reference level)
ae = amin
3,85 dB
max.
5,0 dB
Nominal frequency
fN
Centre frequency
fc
2 dB Bandwidth
BW
-
912,5
54,3
MHz
MHz
912,5 MHz
-
3 dB Bandwidth
BW
57,7 MHz
min. 45,0 MHz
Pass band ripple
within ± 22,5 MHz
1.8
dB
max.
3,0 dB
Relative attenuation
arel
f_N – 117,5 MHz .... f_N – 812,5 MHz 47,0
f_N + 117,5 MHz .... f_N + 257,5 MHz 50,0
f_N + 257,5 MHz .... f_N + 302,5 MHz 50,0
f_N + 302,5 MHz .... f_N + 587,5 MHz 50,0
Operating temperature range
dB
min.
dB
min.
dB
min.
dB
min.
-
40,0 dB
30,0 dB
45,0 dB
40,0 dB
- 25 °C ... + 75 °C
Storage temperature range
-
- 30 °C ... + 80 °C
Temperature Coefficient TC
- 72 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.
Generated:
Checked / approved:
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