Filename: tfs 140al.doc
Version 1.4
15.07.2005
VI TELEFILTER
Filter specification
TFS 140AL
1/5
Tele Filter GmbH
Potsdamer Straße 18
D 14 513 TELTOW / Germany
Tel: (+49) 3328 4784-0 / Fax: (+49) 3328 4784-30
E-Mail:
tft@telefilter.com
VI TELEFILTER reserves the right to make changes to the product(s) and/or information contained herein without notice. No liability is
Measurement condition
Ambient temperature:
23
°C
Input power level:
0
dBm
Terminating impedance: *
Input:
212 Ω || -11,9 pF
Output:
1620 Ω || - 4,0 pF
Characteristics
Remark:
Reference level for the relative attenuation arel of the TFS 140AL 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 center frequence fc is the arithmetic mean value of the upper and lower frequencies at the 32
dB
filter attenuation level relative to the insertion loss ae. The temperature coefficient of frequency Tcf is valid both for the centre frequency fc and the
frequency response of the filter in the operating temperature range.
D a t a
typ. value
tolerance / limit
Insertion loss
(Reference level)
ae
30
dB
max.
35
dB
Centre frequency
at ambient temperature :
fc
140,01
MHz
140,0 ± 0,05
MHz
Pass band
at ambient temperature
PB
fC ... fC ± 4,48
MHz
Amplitude ripple
in PB (p-p):
0,4
dB
max.
0,8
dB
Bandwidth
at ambient temperature:
0,8 dB
9,27
MHz
min.
8,96
MHz
2
dB
9,40
MHz
min.
9,29
MHz
3
dB
9,47
MHz
min.
9,33
MHz
32
dB
10,01
MHz
max.
10,08
MHz
Relative attenuation
arel
fC
... fC ±
4,48
MHz
0,4
dB
max.
0,8
dB
fC ±
4,48
MHz ... fC ±
4,64
MHz
1
dB
max.
2
dB
fC ±
4,64
MHz ... fC ±
4,66
MHz
1,5
dB
max.
3
dB
fC ±
5,04
MHz ... fC ±
6,00
MHz
34
dB
min.
32
dB
fC ±
6,00
MHz ... fC ±
8,17
MHz
42
dB
min.
39
dB
In the frequency range fc ± 6,00 MHz ... fc ± 8,17 MHz the type of the LIMIT LINE is a SLOPING LINE (SL).
fC ±
8,17
MHz ... fC ± 14,5
MHz
48
dB
min.
45
dB
fC ± 14,5
MHz ... fC ± 100
MHz
55
dB
min.
50
dB
Group delay
( mean value in pass band ):
3,03
µs
max.
5,36
µs
Group delay
ripple in pass band (p-p):
45
ns
max. 120
ns
Operating temperature range
-
- 25
°C ... + 75 °C
Storage temperature range
-
- 40
°C ... + 85 °C
Temperature coefficient of frequency
TCf **)
- 0,04
ppm/K
2
-
Frequency inversion temperature
T0
10
°C
-
Input power level
-
max. +10
dBm
* ) The terminating impedances depends 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/K²) x (T-T0)² x fTo(MHz)
generated:
checked / approved:
assumed as a result of their use or application. No rights under any patent accompany the sale of any such product(s) or information.
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