TFH70F.doc
version 1.2
20.06.2001
VI TELEFILTER
Filter Specification
TFH 70F
1/5
Measurement condition
Ambient temperature:
Input power level:
25 °C
10 dBm
for input:
for output:
Terminating impedances *):
330 Ω ⎟⎢ -13,7 pF
250 Ω ⎟⎢ -15,7 pF
Remark:
Reference level for the relative attenuation a of the TFH 70F is the insertion loss. The insertion loss a is defined as the insertion loss at the
rel
c
e
nominal frequency f . The centre frequency f is the arithmetic mean value of the upper and lower frequencies at the 3 dB filter attenuation level
N
relative to the insertion loss a . The given values for the insertion loss, the relative attenuation a and the group delay ripple have to be reached
e
rel
at the frequencies given below also if the centre frequency f is shifted due to the temperature coefficient of frequency TC in the operating
temperature range and due to a production tolerance for the centre frequency f .
c
f
c
D a t a
typ. value
tolerance/limit
Insertion loss
(Reference level)
a
20,6
dB
max. 24,0
dB
e
Nominal frequency
Passband
Passband variation
f
-
70,0
0,40 MHz
0,65 dB
MHz
N
PB
p-p
f
±
N
0,25 dB
3
dB bandwidth
BW
BW
1,338 MHz
1,988 MHz
min.
max.
1,156 MHz
2,180 MHz
40 dB bandwidth
Relative attenuation
fN ± 0,578 MHz .......
a
rel
- 1,50 MHz
max.
3
dB
fN - 1,09 MHz .......
fN + 1,09 MHz .......
fN ± 1,50 MHz .......
fN ± 4,00 MHz .......
f
f
f
f
43
dB
dB
dB
dB
min. 40
min. 40
min. 45
min. 50
dB
dB
dB
dB
N
N + 1,50 MHz
N ± 4,00 MHz
N ± 20
45
48
54
MHz
Phase linearity in
f
f
± 0,578 MHz
± 0,578 MHz
3,3
105
°
max.
5,5
°
N
N
Group delay variation in
Absolute group delay
ns
µs
max. 175
max.
ns
µs
3,1
4,0
Temperature coefficient of frequency Tcf **)
Operating temperature range
- 0,036 ppm/K²
- 20..+ 80
- 25..+ 85
°C
Storage temperature range
°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 - TA)2 x fCAT (MHz)
c
Generated:
Checked / approved:
VI TELEFILTER
Potsdamer Straße 18
Vectron International, Inc.
267 Lowell Road
D 14 513 TELTOW / Germany
Tel: (+49) 3328 4784-0 / Fax: (+49) 3328 4784-30
Hudson, NH 03051 / USA
Tel: (603) 598-0070 Fax: (603) 598-0075
E-Mail: tft@telefilter.com
E-Mail: 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.