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参数资料
| 型号： | TFS245B |
| 厂商： | VECTRON INTERNATIONAL |
| 元件分类： | 声表面波滤波器 |
| 英文描述： | 1 FUNCTIONS, 245.952 MHz, SAW FILTER |
| 文件页数： | 1/5页 |
| 文件大小： | 152K |
| 代理商： | TFS245B |
Filename: tfs 245b.doc
Version 1.3
21.07.2004
VI TELEFILTER
Filter specification
TFS 245B
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 impedance *)
for input:
955
// -5,8 pF
for output:
900
// -6,3 pF
Characteristics
Remark:
The nominal frequency fN is fixed at 245,952. The insertion loss ae is defined as loss value determined at fN. Reference level for the relative attenuation
arel of the TFS 245B is 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. All specified data are met within the operating temperature range.
D a t a
typ. value
tolerance / limit
Insertion loss
ae
5,6
dB
max.
8
dB
Nominal frequency
fN
-
245,952 MHz
Passband
-
fN ±
250
kHz
Pass band ripple
0,4
dB
max.
1
dB
Bandwidth
BW
3
dB
850
kHz
Absolute attenuation
aabs
fN ±
0,95
MHz ... fN ±
2,50 MHz
30
dB
min.
27
dB
fN ±
2,50
MHz ... fN ± 12,50 MHz
40
dB
min.
32
dB
fN ±
12,50
MHz ... fN ± 50,00 MHz
56
dB
min.
50
dB
Group delay ripple within PB
170
ns
max.
300
ns
Return loss within PB
16
dB
min.
12
dB
Operating temperature range
OTR
-
- 25 °C ...+ 75 °C
Storage temperature range
-
- 40 °C ... + 85 °C
Turn over temperature
22
°C
-
Temperature coefficient of frequency
TCf **
-0,04
ppm/K
2
-
*)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.
**)
fc(Hz) = Tcf(ppm/K) x (T - To) x fCAT (MHz).
Generated:
Checked / Approved:
相关PDF资料 |
PDF描述 |
|---|---|
| TFS245C | 1 FUNCTIONS, 245.76 MHz, SAW FILTER |
| TFS246B | SAW FILTER |
| TFS246D | SAW FILTER |
| TFS246E | SAW FILTER |
| TFS246H | SAW FILTER |
相关代理商/技术参数 |
参数描述 |
|---|---|
| TFS245C | 制造商:VECTRON 制造商全称:Vectron International, Inc 功能描述:Filter specification |
| TFS246B | 制造商:VECTRON 制造商全称:Vectron International, Inc 功能描述:Filter specification |
| TFS246D | 制造商:VECTRON 制造商全称:Vectron International, Inc 功能描述:SAW filter specification |
| TFS246H | 制造商:VECTRON 制造商全称:Vectron International, Inc 功能描述:SAW filter specification |
| TFS246H_05 | 制造商:VECTRON 制造商全称:Vectron International, Inc 功能描述:Filter specification |
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