
Tfs35B.doc
VI TELEFILTER
version 1.0
TFS 35 B
10.02.2003
1/5
Filter specification
1. Measurement condition :
Ambient temperature T
A
:
Input power level:
Terminating impedances in fc * ):
Source impedance .
Load impedance .
2. Characteristics :
Remark:
Reference level for the relative attenuation
arel
of the
TFS 35B
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 reference frequency
fc
is the arithmetic mean value of the upper and lower
frequencies at the
3 dB
filter attenuation level relative to the insertion loss
ae.
. The nominal frequency
fN
is fixed at
35,42 MHz
without tolerance.
All specified values are guarantied in operating temperature range.
D a t a
25 °C
0 dBm
for input:
for output:
50
.
50
.
310
- 25,7 pF.
690
- 10,1 pF.
typ. value
tolerance / limit
Insertion loss
(Reference level)
ae
14,8
dB
max.
17
dB
Nominal frequency
fN
-
35,42
MHz
Centre frequency
fc
at ambient temperature
(f
CTA
)
35,42
MHz
-
Pass band :
PB
f
C
... f
C
± 0,80 MHz
Amplitude ripple in PB (p-p) :
0,6
dB
max.
1,6 dB
Bandwidth :
1 dB
3 dB
BW
2,01
2,44
MHz
MHz
min.
1,7 MHz
-
21 dB
3,32
MHz
max.
3,74 MHz
Relative attenuation in O.T.R. :
34,62
MHz ... 36,22
arel
dB
max.
MHz
0,8
1,6 dB
28
31
0,1
7
MHz ...
MHz ... 28
MHz ... 31
MHz ... 33,5
7
MHz
MHz
MHz
MHz
55...27
55...50
dB
dB
dB
dB
min.
min.
min.
-
dB
dB
dB
35
30
21
35
40...30
37,34
39,84
62,42
72,42
MHz ... 39,84
MHz ... 62,42
MHz ... 72,42
MHz ... 110,42
MHz
MHz
MHz
MHz
27...42
45...60
dB
dB
dB
dB
min.
min.
min.
min.
21
35
30
40
dB
dB
dB
dB
36
70...80
Group delay ( mean value in PB ):
Group delay ripple in PB (p-p) :
Deviation from linear phase in PB (p-p) :
1,4
μs
ns
degree
max.
max.
1,7 μs
300
-
200
± 2
ns
Triple transit attenuation compared to main signal
Crosstalk attenuation compared to main signal
35
50
dB
dB
Temperature coefficient of frequency ( Tc
f
)
Frequency deviation of fc over temperature
- 20
ppm/K
-
-
fc(Hz) = Tc
f
(ppm/K) x (T - T
A
) x f
CTA
(MHz)
Operating temperature range ( O.T.R. )
Storage temperature range
-
-
- 40 °C ... + 85 °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.
Generated:
Chillla
Checked / approved:
Dr. Wall
VI TELEFILTER
Potsdamer Strae 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.