鈩?/div>
// -0,8 pF
Coupling coil:
56 nH
Filter Specification
TFS 440A
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Characteristics
Remark:
Reference level for the relative attenuation arel of the TFS440A 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 1.5 dB filter attenuation level relative to the insertion loss ae. The nominal frequency fN is fixed on 440 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.
Data
Insertion loss
(Reference level)
Nominal frequency
Centre frequency
ae = amin
fN
fc
typ. value
-
-
440,015 MHz
BW
0,5
0,5
1,2
32
48
63
64
0,9
-
dB
dB
dB
dB
dB
dB
dB
碌s
tolerance/limit
max.
6,5
440,00
dB
MHz
Pass band ripple
fN
鹵 70 kHz
Relative attenuation
fN
鈥N
fN 鹵 70
kHz 鈥N
fN 鹵 0,4 MHz鈥N
fN 鹵 0,6 MHz鈥N
fN 鹵 0,8 MHz鈥N
fN 鹵 3
MHz鈥N
Group delay ripple
fN 鹵 100 kHz
Input power level
Operating temperature range
Storage temperature range
Temperature coefficient of frequency
Frequency inversion temperature
鹵 70
鹵 100
鹵 0,6
鹵 0,8
鹵 3
鹵 78
arel
kHz
kHz
MHz
MHz
MHz
MHz
GD
max.
max.
max.
min.
min.
min.
min.
max.
max.
1,5
1,5
3,0
25
40
50
50
2,0
5
dB
dB
dB
dB
dB
dB
dB
碌s
dBm
- 20
擄C
... + 70
擄C
- 35
擄C
鈥?+ 85
擄C
TC
- 0.036
+ 25
ppm/K虜
擄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:
VI TELEFILTER
Vectron International Inc.
Potsdamer Stra脽e 18
267 Lowell Road
D 14 513 TELTOW / Germany
Hudson, NH 03051 / USA
Tel: (+49) 3328 4784-0 / Fax: (+49) 3328 4784-30
Tel: (603) 598-0070 Fax: (603) 598-0075
E-Mail:
vti@vtinh.com
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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