Filename: tfs 549a.doc
Version 1.2
13.07.2004
VI
TELEFILTER
Measurement condition
Ambient temperature:
Input power level:
Terminating impedance: *
23
0
for input:
for output:
°C
dBm
Filter specification
TFS 549A
1/5
956
Ω
|| -3,0 pF
718
Ω
|| -3,6 pF
Characteristics
Remark:
The reference level for the relative attenuation arel of TFS 549A is the minimum of the pass band attenuation amin. This value 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 dB filter attenuation level relative to the insertion
loss ae. The given values for the relative attenuation arel and the group delay ripple have to be reached at the frequencies given below, even 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
Passband
Pass band ripple
Relative attenuation
f
N
f
N
f
N
f
N
f
N
±
±
typ. value
ae
f
N
13,8
-
-
-
within PB
arel
±
±
±
tolerance / limit
max.
15
-
549,5
f
N
max.
±
2,5
dB
dB
MHz
MHz
dB
-
0,5
MHz ... f
N
4
6,5
548,5
22
MHz ... f
N
MHz ... f
N
MHz ... f
N
MHz ... f
N
2,5
6,5
22
22
451,5
MHz
MHz
MHz
MHz
MHz
0,5
8
44
55
54
600
10
dB
dB
dB
dB
dB
ns
ns
max.
min.
min.
min.
min.
max.
max.
1
3
39
50
50
800
50
dB
dB
dB
dB
dB
ns
ns
-
+
-
+
Absolute group delay
Group delay ripple within PB
Phase linearity (p-p)
at any 2 MHz band width in PB
Triple transit response suppression
VSWR
Operating temperature range
Storage temperature range
Turn over temperature
Temperature coefficient of frequency
TCf **
OTR
1,8
53
1,5:1
-
-
28
-0,05
deg
dB
max.
min.
max.
2,55
30
2:1
deg
dB
- 10°C ... + 65°C
- 25°C ... + 75°C
°C
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.
**)
∆f(Hz)
= TCf(ppm/K²) x (T-T
0
)² x fTo(MHz)
Generated:
Checked / Approved:
Tele Filter GmbH
Potsdamer Straße 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 [ Vectron International, Inc ]
