TFS70H44 Datasheet, PDF (1/5 Pages) Vectron International, Inc – Filter Specification

File name: Tfs70H44.doc
VI TELEFILTER
Measurement condition :
Ambient temperature T_A:
Input power level:
Terminating impedances in fc *) :
Filter Specification
23 °C
0 dBm
for input:
for output:
486 Ω  - 10,2 pF
337 Ω  - 12,2 pF
version 1.2
TFS 70H44
30.07.2002
1/5
Characteristics :
Remark: Reference level for the relative attenuation arel of the TFS 70H44 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 reference 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 temperature coefficient of frequency Tc_f is valid both for
the reference frequency fc and the frequency response of the filter in the operating temperature range. The frequency shift of the filter in the
operating temperature range is not included in the production tolerance scheme.
Data
typ. value
tolerance / limit
Insertion loss (Reference level)
ae
Centre frequency at ambient temperature (f_CTA) fc
25
dB
70,0 MHz
max. 27,5 dB
70,0 ± 0,15 MHz
Pass band :
Amplitude ripple in PB :
PB
0,6 dB
fc ± 12,8 MHz
max.
1 dB
Bandwidth at ambient temperature T_A:
BW
1 dB
3 dB
10 dB
20 dB
40 dB
27,25
28,97
31,76
34,05
36,90
MHz
MHz
MHz
MHz
MHz
min. 25,6 MHz
min. 28,0 MHz
max. 37,7 MHz
Relative attenuation :
arel
fc
... fc ± 12,8 MHz
fc ± 12,8 MHz ... fc ± 14,0 MHz
fc ± 18,85 MHz ... fc ± 25 MHz
fc ± 25 MHz ... fc ± 60 MHz
Group delay ( mean value in PB ):
Group delay ripple in PB (p-p):
Deviation from linear phase in PB :
-
-
47
dB
53
dB
0,90 µs
38
ns
5,8 °
max.
max.
min.
min.
1 dB
3 dB
40 dB
45 dB
max.
max.
50 ns
8°
Triple transit attenuation compared to main signal
Crosstalk
56
dB
60
dB
Temperature coefficient of frequency ( Tc_f ) :
Frequency deviation of fc over temperature :
Operating temperature range
Storage temperature range
- 75
ppm/K
∆fc(Hz) = Tc_f(ppm/K) x (T - T_o) x f_CTA (MHz)
- 25 °C ... + 80 °C
- 40 °C ... + 85 °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.
generated:
checked / approved:
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D 14 513 TELTOW / Germany
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