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參數(shù)資料
| 型號： | TFS321 |
| 廠商： | VECTRON INTERNATIONAL |
| 元件分類： | 聲表面波濾波器 |
| 英文描述： | Filter Specification |
| 中文描述： | 1 FUNCTIONS, 321.4 MHz, SAW FILTER |
| 文件頁數(shù)： | 1/5頁 |
| 文件大?。?/td> | 141K |
| 代理商： | TFS321 |
Tfs321.doc
VI
TELEFILTER
Measurement condition
Ambient temperature:
Input power level:
Terminating impedances
*
Characteristics
Remark:
Reference level for the relative attenuation arel of the TFS 321 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 321,4 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
version 1.3
30.07.2001
Filter Specification
TFS 321
1/5
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
input:
output:
External coil:
490 Ohm // –1.6 pF
490 Ohm // –1.6 pF
175 nH
typ. value
tolerance/limit
Insertion loss
(Reference level)
ae = amin
-
max.
6,5
dB
Nominal frequency
fN
fC
-
321,400 MHz
Centre frequency
321,41
Usable signal bandwidth
-
min.
140
kHz
3 dB bandwidth
BW
-
min.
280
kHz
Relative attenuation
fN ± 400 kHz
fN ± 400 kHz ... fN ± 600 kHz
fN ± 600 kHz ... fN ±
arel
-
-
-
min. 15
min. 27
min. 35
dB
dB
dB
13 MHz
Group delay ripple
fN ±
70 kHz
GD
-
max.
2
μ
s
Input power level
-
max.
13
dBm
Operating temperature range
-20
°
C ... +70
°
C
Temperature coefficient of frequency
TC
**
-0.036
ppm/K2
Frequency inversion temperature
T
0
+ 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.
**)
f(Hz) = TCf(ppm/K2) x (T-T
0
)2 x fTo(MHz)
Generated:
Checked / approved:
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