Filter Specification
Description
Tfs403.
doc
version 1.
4
25.
11.
2002
VI TELEFILTER
Measurement condition
Ambient temperature: 23 C Input power level: 0 dBm Terminating impedances at fc *:input: 81 output: 86
Filter Specification
TFS 403
1/5
II –11,5 pF II –12,6 pF
Characteristics
Remark:
Reference level for the relative attenuation arel of the TFS 403 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 403,5 MHz without tolerance.
The given www.
DataSheet4U.
com values for the relative attenuation a rel 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 Amplitude ripple in PB Relative attenuation fN .
.
fN ± 5,5 fN ± 9 fN ± 19,5 fN + 400,5 2 fN ± 3 MHz MHz MHz MHz MHz .
.
.
.
.
.
.
ae
typ.
Value
4,6 dB max.
Limit
5,5 dB
fN PB p-p
a rel
-
403,5 MHz
fN 0,6 dB max.
1,5 MHz 1 dB
fN ± fN fN fN fN
1,5
MHz MHz MHz MHz MHz
32 32 45 70 85 dB dB dB dB dB
max.
1 min.
min.
min.
min.
min.
20 25 35 20 20 -
dB dB dB dB dB dB
± 9 ± 19,5 ± 23,5 + 406,5
Return loss within PB
14 dB
Input power level Temperature coefficient of frequency Tc f ** Operating temperature range Storage temperature range
-20 ppm/K -
max.
10
dBm
- 10 °C.
.
+ 60 - 40 °C.
.
+ 85
°C °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 desig...
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