TFS440A Datasheet, PDF (1/5 Pages) Vectron International, Inc – Filter specification

Tfs440A.doc
VI TELEFILTER
version 1.2
Filter Specification
19.12.2001
TFS 440A
1/5
Measurement condition
Ambient temperature:
23 °C
Input power level:
0 dBm
Terminating impedances *)
for input:
300 Ω // -0,8 pF
for output:
300 Ω // -0,8 pF
Coupling coil: 56 nH
Characteristics
Remark:
Reference level for the relative attenuation arel of the TFS440A 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 1.5 dB filter attenuation level relative to the insertion loss ae. The nominal frequency fN is fixed on 440 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 also 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)
ae = amin
-
max.
6,5 dB
Nominal frequency
fN
Centre frequency
fc
Pass band ripple fN ± 70 kHz
BW
Relative attenuation
arel
fN
…fN ± 70 kHz
fN ± 70 kHz …fN ± 100 kHz
fN ± 0,4 MHz…fN ± 0,6 MHz
fN ± 0,6 MHz…fN ± 0,8 MHz
fN ± 0,8 MHz…fN ± 3 MHz
fN ± 3 MHz…fN ± 78 MHz
Group delay ripple
GD
fN ± 100 kHz
Input power level
-
440,015 MHz
0,5 dB
0,5 dB
1,2 dB
32
dB
48
dB
63
dB
64
dB
0,9 µs
-
440,00 MHz
max.
1,5 dB
max.
1,5
dB
max.
3,0
dB
min. 25
dB
min. 40
dB
min. 50
dB
min. 50
dB
max.
max.
2,0 µs
5
dBm
Operating temperature range
- 20 °C ... + 70 °C
Storage temperature range
- 35 °C … + 85 °C
Temperature coefficient of frequency TC
- 0.036 ppm/K²
Frequency inversion temperature
+ 25
°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:
VI TELEFILTER
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Vectron International Inc.
267 Lowell Road
Hudson, NH 03051 / USA
Tel: [phone] Fax: [phone]
E-Mail: [e-mail]
E-Mail: [e-mail]
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