
Tfs85f.doc
VI
TELEFILTER
version 1.1
21.05.2003
Preliminary specification
TFS 85 F
1/5
Measurement condition
Ambient temperature:
Input power level:
Terminating impedances at fc
*:
input:
Characteristics
Remark:
Reference level for the relative attenuation arel of the TFS 85 F 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 5 dB filter attenuation level relative to the insertion loss ae. The nominal frequency fN is fixed at 85,38 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.
D a t a
TELEFILTER GmbH
Potsdamer Strae 18
D 14 513 TELTOW / Germany
Tel: (+49) 3328 4784-0 / Fax: (+49) 3328 4784-30
tft@telefilter.com
E-Mail:
VI TELEFILTER reserves the right to make changes to the product(s) and/or information contained herein without notice. No liability is
assumed as a result of their use or application. No rights under any patent accompany the sale of any such product(s) or information.
23
0
°
C
dBm
2,76 k
// -10,3 pF (preliminary value)
output: 2,33 k
// -13,1 pF (preliminary value)
typ. Value
Limit
Insertion loss
(Reference level)
Nominal frequency
ae
8
dB
max. 12
dB
fN
-
85,38 MHz
Centre frequency
Pass band
Pass band ripple
(p-p)
fc
85,38
MHz
-
PB
-
-
fN
±
0,3 MHz
max.
0,8 dB
Relative attenuation
arel
fN
fN ± 0,3 MHz ....... fN ± 0,63 MHz
....... fN ± 0,3 MHz
0,4
4,5
dB
dB
max.
max.
0,8 dB
5 dB
fN ± 0,9 MHz ....... fN ± 1,25 MHz
fN ± 1,25 MHz ....... fN ± 1,7 MHz
fN ± 1,7 MHz ....... fN ± 2,05 MHz
fN ± 2,05 MHz ....... fN ± 9
fN ± 9
MHz ....... fN ± 20
40
36
36
50
65
dB
dB
dB
dB
dB
min.
min.
min.
min.
min.
33 dB
33 dB
33 dB
33 dB
45 dB
MHz
MHz
Phase linearity
in
fN ±
0,63
MHz
1,8
°rms
max.
3,5
°rm
Operating temperature range
-
- 30 °C .. + 80
°C
Storage temperature range
-
- 40 °C .. + 85
°C
Temperature Coefficient of frequency
TC
f
**
- 0,036 ppm / K2
-
Frequency inversion temperature
t.b.d.
-
*) 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.
**)
f(Hz) = TCf(ppm/K2) x (T-T
0
)2 x fTo(MHz)
generated:
checked / approved: