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参数资料
| 型号： | TFH44B |
| 厂商： | VECTRON INTERNATIONAL |
| 元件分类： | 声表面波滤波器 |
| 英文描述： | 1 FUNCTIONS, 44 MHz, SAW FILTER |
| 文件页数： | 1/5页 |
| 文件大小： | 32K |
| 代理商： | TFH44B |
File name : TFH44B.doc
Version 1.0
13.03.2001
VI TELEFILTER
Filter Specification
TFH 44B
1/5
VI TELEFILTER
Vectron International, Inc.
Potsdamer Strae 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: tft@telefilter.com
Email: vti@vtinh.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.
1. Measurement condition
Ambient temperature TA:
25 °C
Input power level:
0 dBm.
Terminating impedances at fc:
for input:
50
0 pF.
for output:
50
0 pF.
2. Characteristics
Remark:
The insertion loss ae is defined as the insertion loss at the nominal frequency fN . Reference level for the relative attenuation arel of the TFS 44B
is the insertion loss. The reference 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 temperature coefficient of frequency Tcf is valid both for the centre frequency fc and the frequency response
of the filter in the operating temperature range.
Data
typical values
tolerance / limit
Insertion loss (Reference level)
ae
19,8 dB
max.
22
dB
Nominal frequency
fN
44
MHz
Centre frequency
fC
44
MHz
Pass band (PB) :
fC ... fC ± 2,5 MHz
Amplitude ripple in PB (p-p) :
0,35 dB
max.
0,55
dB
Bandwidth
at ambient temperature:
0,55 dB - band width
5,52 MHz
min.
5,0
MHz
1
dB - band width
5,72 MHz
3
dB - band width
6,07 MHz
min.
6,0
MHz
20
dB - band width
6,97 MHz
42
dB - band width
7,40 MHz
max.
7,67
MHz
Relative attenuation
arel
fN
... fN ±
2,50
MHz
0,35 dB
max.
0,55 dB
fN ±
2,50
MHz ... fN ±
3,0
MHz
< 2,7 dB
max.
3
dB
fN ±
3,835 MHz ... fN ±
20
MHz
43...50dB
min.
42dB
Group delay ( mean value in PB )
2,1 s
max.
3
s
Group delay ripple in fN ... fN ± 2,1 MHz (p-p) *)
55
ns
max.
75
ns
Deviation from linear phase in fN ... fN ± 2,1 MHz (p-p)
2° ( r.m.s. 0,7° )
max.
3,5°
Triple transit attenuation compared to main signal
47
dB
Crosstalk
65
dB
Temperature coefficient of frequency ( Tcf )
- 75
ppm/K
Frequency deviation of fN over temperature :
fc(Hz) = Tcf(ppm/K) x (T - TA) x fN (MHz)
Operating temperature range
25 °C
Storage temperature range
- 25 °C ... + 85 °C
* ) measured with smoothing aperture of 78,75 kHz.
Generated:
Dunzow W.P.
Checked/Approved:
Dr. Bert Wall
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