TFS35G Datasheet, PDF (1/5 Pages) Vectron International, Inc – Filter specification

Filename: TFS35G.doc
Vectron International
Version 2.0
Filter specification
TFS 35G
11.10.2012
1/5
Measurement condition
Ambient temperature:
Input power level:
Terminating impedance: *
Input:
Output:
Source impedance:
Load impedance:
25
°C
0
dBm
469.96 Ω || -28.72 pF
956.93 Ω || -10.11 pF
500 Ω.
1000 Ω.
Characteristics
Remark:
The reference level for the relative attenuation arel of the TFS 35G 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 35.42 MHz without any tolerance. The given values for both the
relative attenuation arel and the group delay ripple have to be achieved 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)
Nominal frequency
Centre frequency
ae
12.9 dB
fN
fC
35.42 MHz
max.
17 dB
35.42 MHz
-
Passband (1)
PB1
-
fC ± 0.80 MHz
Passband (2)
Pass band ripple in PB1
PB2
-
0.7 dB
max.
fC ± 1.023 MHz
1.6 dB
Bandwidth
1.6 dB
3 dB
Relative attenuation
34.620 MHz
…
34.397 MHz
…
0.420 MHz
…
38.443 MHz
…
62.000 MHz
…
Group delay
BW
arel
36.220
36.443
32.397
62.000
70.420
MHz
MHz
MHz
MHz
MHz
mean value in PB1
2.29 MHz
2.61 MHz
0.7 dB
0.9 dB
40
dB
32
dB
22
dB
1.2 µs
min.
min.
max.
max.
min.
min.
min.
max.
1.7 MHz
2.046 MHz
1.6 dB
3.0 dB
25 dB
25 dB
15 dB
1.7 µs
Group delay ripple within PB1
190
ns
max. 350 ns
Deviation from linear phase within PB1
4
°
max.
7°
Input/Output return loss within PB1
4
dB
min.
2 dB
Input power level
-
max.
0 dBm
Operating temperature range
OTR
-
- 40 °C ... + 85°C
Storage temperature range
-
- 55 °C ... + 125°C
Temperature coefficient of frequency
TCf **
-18
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.
**) ∆f(Hz) = TCf(ppm/K) x (T-T0) x fTo(MHz).
Generated:
Checked / Approved:
Vectron International GmbH
Potsdamer Straße 18
D 14 513 TELTOW / Germany
Tel: [phone] / Fax: [phone]
E-Mail: [e-mail]
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