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參數(shù)資料
| 型號(hào)： | TFS408 |
| 廠商： | VECTRON INTERNATIONAL |
| 元件分類： | 聲表面波濾波器 |
| 英文描述： | 1 FUNCTIONS, 408 MHz, SAW FILTER |
| 文件頁數(shù)： | 1/5頁 |
| 文件大小： | 113K |
| 代理商： | TFS408 |
Filename: tfs 408.doc
Version 1.5
11.04.2005
VI TELEFILTER
Filter specification
TFS 408
1/5
Tele Filter GmbH
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.
Measurement condition
Ambient temperature:
23
°C
Input power level:
0 dBm
Terminating impedances *
for input:
790 Ohm || - 1.45 pF
for output:
790 Ohm || - 1.45 pF
Coupling coil:
100 nH
Characteristics
Remark:
Reference level for the relative attenuation arel of the TFS 408 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 3 dB
filter attenuation level relative to the insertion loss ae. The nominal frequency fN is fixed at 408,0 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 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
typ. value
tolerance / limit
Insertion loss in OTR
ae
3,7
dB
max.
5,5
dB
Insertion loss in ROTR
3,7
dB
max.
5,0
dB
Nominal frequency
fN
-
408,0
MHz
Centre frequency
fC
408,035
MHz
-
Relative attenuation
arel
fN
...
fN
±
100
kHz
0,4
dB
max.
1,5
dB **
fN
±
100
kHz
...
fN
±
150
kHz
2
dB
max.
3
dB
fN
±
500
kHz
...
fN
±
700
kHz
30
dB
min.
25
dB
fN
±
700
kHz
...
fN
±
4,8
MHz
44
dB
min.
40
dB
0,3
MHz ...
fN
-
4,8
MHz
53
dB
min.
45
dB
fN
+
4,8
MHz ...
800
MHz
55
dB
min.
45
dB
Group delay ripple
fN
±
150
kHz
1
s
max.
2
s
Input power level
****
-
max.
10
dBm
Operating temperature range
OTR
-
- 40°C ... + 85 °C
Reduced operating temperature range
ROTR
-
0°C ... + 50 °C
Storage temperature range
-
- 55°C ... + 125 °C
Frequency inversion temperature
T0
***
28
°C
-
Temperature coefficient of frequency
TCf ***
-0,038
ppm/K
-
*) 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.
**) 1 dB in reduced operating temperature range
***)
f(Hz) = TCf(ppm/K) x (T-T0) x fTo(MHz).
****) also guaranteed 15 dBm for 1 minute over lifetime of filter
Generated:
Checked / Approved:
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