TFS70AS Datasheet, PDF (1/5 Pages) Vectron International, Inc – Filter specification

Filename: tfs 70as.doc
VI TELEFILTER
Version 1.0
Filter specification
TFS 70AS
05.05.2004
1/5
Measurement condition :
Ambient temperature T_A:
Input power level:
Terminating impedances at fc *) :
23 °C
0 dBm
for input: 144
for output: 200
Ω || -19,8 pF
Ω || -23,1 pF
Characteristics
Remark:
The reference level for the relative attenuation arel of the TFS 70AS 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 nominal frequency fN is fixed at 70 MHz. The values for relative attenuation are guaranteed at
ambient temperature. The frequency shift of the filter over temperature defined by the temperature coefficient of frequency Tc_f is not included in the
production tolerance scheme.
Data
typ. value
tolerance / limit
Insertion loss :
( reference level )
Nominal frequency :
Centre frequency :
ae
fN
fc at ambient temperature (f_CTA)
10
dB
-
70
MHz
max. 11
70
dB
MHz
Pass band :
PB
Relative attenuation :
arel
fN
... fN ± 3,5 MHz
fN ± 3,5 MHz ... fN ± 4,0 MHz
fN ± 5,0 MHz ... fN ± 8,0 MHz
fN ± 8,0 MHz ... fN ± 50 MHz
-
1,0 dB
1,8 dB
25
dB
38
dB
f_N ± 4,5 MHz
max. 1,5
max. 3
min. 20
min. 35
dB **
dB
dB
dB
Group delay ( mean value in PB ):**/***
Group delay ripple (p-p) in PB :**/***
2,0 µs
150
ns
max. 2,2 µs
max. 300
ns
Temperature coefficient of frequency ( Tc_f )
Frequency deviation of fc over temperature
Operating temperature range
OTR
Storage temperature range
- 72
ppm/K
-
∆fc(Hz) = Tc_f(ppm/K) x (T - T_CTA) x f_CTA (MHz)
- 40 °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.
**) A cascade of TFS70AR and TFS70AS will have triple transit signal cancellation offering reduced group delay and amplitude ripple of the cascade.
***) for a cascade of TFS 70AR and TFS70AS
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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