TFS70AA Datasheet, PDF (1/5 Pages) Vectron International, Inc – Filter specification

Tfs70AA.doc
VI TELEFILTER
Filter specification
version 1.1
TFS 70AA
17.03.2003
1/5
1. Measurement condition :
Ambient temperature TA:
Input power level:
Terminating impedances at fc *) :
23 °C
0 dBm
for input:
238
for output:
284
- 4,97 pF.
- 3,75 pF.
2. Characteristics
Remark:
Reference level for the relative attenuation arel of the TFS 70AA 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 70 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
Insertion loss ( reference level ) : ae
typ. value
20,5 dB
tolerance / limit
max. 22
dB
Nominal frequency :
Centre frequency :
fN
fc at ambient temperature (fCTA)
-
70
MHz
70
MHz
Pass band :
PB
f_N ... f_N ± 9,5 MHz
Bandwidth at ambient temperature : BW
3 dB
40 dB
20,10 MHz
30,20 MHz
min. 19,63 MHz
max. 39,37 MHz
Relative attenuation :
arel
fN
... fN ± 9,5MHz
fN ± 20 MHz ... fN ± 50 MHz
Group delay ( mean value in PB ):
Group delay ripple (p-p) in PB :
Deviation from linear phase (p-p) in PB :
-
50
dB
0,49 µs
22
ns
6° ( r.m.s. 1,7° )
max. 3
dB
min. 40
dB
max. 1
µs
max. 30
ns
Triple transit attenuation compared to main signal
47
dB
-
Crosstalk
50
dB
Temperature coefficient of frequency ( Tcf )
Frequency deviation of fc over temperature
Operating temperature range
OTR
Storage temperature range
- 72 ppm/K
fc(Hz) = Tcf(ppm/K) x (T - TCTA) x fCTA (MHz)
- 40 °C ... + 85 °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:
Dunzow W.
Dr. Bert Wall
TELEFILTER GmbH
Potsdamer Straße 18
D 14 513 TELTOW / Germany
Tel: [phone] / Fax: [phone]
E-Mail: [e-mail]
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