TFS44M Datasheet, PDF (1/5 Pages) Vectron International, Inc – Filter specification

Filename: tfs 44m.doc
VI TELEFILTER
Version 1.2
Filter specification
Measurement condition
Ambient temperature:
23
°C
Input power level:
0
dBm
Terminating impedances at fc * ) :
Input:
205 Ω || 0,85 pF
Output:
2000 Ω || 3 pF and matching network
TFS 44M
19.04.2005
1/5
Characteristics
Remark:
Reference level for the relative attenuation arel of the TFS 44M is the insertion loss. The insertion loss ae is defined as the insertion loss at the nominal
frequency fN . The centre frequency fc is the arithmetic mean value of the upper and lower frequencies at the 1 dB filter attenuation level relative to the
insertion loss ae. The temperature coefficient of frequency Tc_f is valid for both the reference frequency fc and the frequency response of the filter in
operating temperature.
Data
typ. value
tolerance / limit
Insertion loss
Nominal frequency
Centre frequency
ae
14,4 dB
f_N
-
f_C
44
MHz
max.
25 dB
44 MHz
-
Passband
PB
Pass band ripple (within 80% of PB)
-
0,4 dB
f_C
± 7 MHz
max.
0,7 dB
1 dB Bandwidth
BW_1dB
14,34 MHz
min.
14 MHz
40 dB Bandwidth
BW_40dB
20,02 MHz
max.
24 MHz
Relative attenuation
f_N ± 12
MHz … f_N ± 33
Group delay ripple within PB
arel
MHz
43
dB
45
ns
min.
max.
40 dB
60 ns
Operating temperature range
OTR
-
- 33 °C ... + 55 °C
Storage temperature range
-
- 40 °C ... + 85 °C
Temperature coefficient of frequency
TCf **
-72
ppm/K
-
*) The terminating impedances depend on parasites 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.
**) ∆fc(Hz) = Tc_f(ppm/K) x (T - T_A) x f_CTA (MHz)
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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