Reference level for the relative attenuation arel of the TFS 140AG 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 f
C
is the arithmetic mean value of the upper and lower frequencies at the 1dB
filter attenuation level relative to the insertion loss ae. The nominal frequency fN is fixed at 140,0 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 f
C
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 f
C
.
Data
Insertion loss
(reference level)
Nominal frequency
Passband
Pass band ripple
Relative attenuation
f
N
f
N
f
N
f
N
f
N
-
-
+
+
139
18
14
18
MHz
MHz
MHz
MHz
... f
N
...
...
...
...
f
N
f
N
f
N
f
N
±
typ. value
ae
f
N
PB
p-p
arel
9,5
18
14
18
360
MHz
MHz
MHz
MHz
MHz
0.3
45
23
14
43
524
p-p
p-p
30
2.5
-
OTR
TCf ****
-
-
-94
ppm/K
dB
dB
dB
dB
dB
ns
ns
deg
9.1
140
-
0.2
dB
dB
MHz
f
N
tolerance / limit
max.
11.5
140
±
dB
MHz
MHz
dB
7,5
0.8
max.
max.
min.
min.
min.
min.
1
37
10
10
37
dB
dB
dB
dB
dB
-
-
+
+
Absolute group delay
in PB**
Group delay ripple
in PB**
Phase linearity
in PB**
Input power level ***
Operating temperature range
Storage temperature range
Temperature coefficient of frequency
max.
max.
max.
50
6
21
ns
deg
dBm
-25 °C..... +70 °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.
**) Maximum variation of the mean value measured in PB within operating temperature range.
***) Maximum value for 10 years operation.
****)
∆f
c(Hz) = TC
f
(ppm/K) x (T - T
o
) x f
To
(MHz).
Generated:
Checked / Approved:
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
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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