
tfs400h.doc
VI
TELEFILTER
version 1.1
11.01.2002
Filter Specification
TFS 400 H 1/5
Measurement condition
Ambient temperature:
Input power level:
Terminating impedances *)
External coil
Characteristics
Remark:
Reference level for the relative attenuation arel of the TFS400H 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 on 400 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 also 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
Insertion loss
ae = amin
(Reference level)
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.
Vectron International Inc.
267 Lowell Road
Hudson, NH 03051 / USA
Tel: (603) 598-0070 Fax: (603) 598-0075
E-Mail:
vti@vtinh.com
23
°
C
0 dBm
for input :
for output :
385
║
-1,05 pF
385
║
-1,05 pF
67 nH
:
typ. value
tolerance/limit
3,6
dB
max.
6,5
dB
Nominal frequency
fN
fc
-
400,000 MHz
Centre frequency
400,02
MHz
Usable signal bandwidth
-
min.
140
kHz
3 dB bandwidth
BW
362
kHz
-
Relative attenuation
fN
fN ± 400 kHz ... fN ± 600 kHz
fN ± 600 kHz ... fN ±
fN ±
1 MHz ... fN ±
arel
... N ±
70 kHz
0,7
dB
max. 3
dB
25
42
54
dB
dB
dB
min.
min.
min.
15
27
35
dB
dB
dB
1 MHz
13 MHz
Group delay ripple
fN ±
70 kHz
GD
0,4
μs
max.
2
μ
s
Operating temperature range
-
- 20
°
C ... + 70
°
C
Storage temperature range
-
- 35
°
C ... + 85
°
C
Temperature coefficient of frequency
TC
- 0.036 ppm/K2
Frequency inversion temperature
+ 20
°
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:
Checked / approved: