鈩?/div>
2.
Remark:
Characteristics
Reference level for the relative attenuation arel of the TFS 1220B 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 at 1220,0 MHz without tolerance. The
temperature coefficient of frequency Tcf is valid both for the frequency fc and the frequency response of the filter in the operating temperature
rang.
Data
Insertion loss
(Reference level)
Nominal frequency
Centre frequency
1,5 dB Bandwidth
Pass band ripple
Relative attenuation
f
C
.... f
C
鹵
4,0 MHz
arel
ae = amin
fN
fc
typ. value
3,50
-
1220,0
19,0
1,0
-
58
54
55
54
55
57
57
58
MHz
dB
dB
dB
dB
dB
dB
dB
dB
56
MHz
MHz
dB
dB
tolerance/limit
max.
5,8
dB
MHz
max. 1220,0
1220,0
鹵2,0
MHz
min. 8,0
max. 1,5
max. 1,5
min.
min.
min.
min.
min.
min.
min.
min.
dB
40,2
44,2
42,0
44,2
40,2
44,2
44,2
44,2
min.
MHz
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
44,2
BW
MHz
f
C
- 36,0
MHz
f
C
- 44,0
MHz
f
C
- 72,0
MHz
f
C
- 88,0
f
C
- 68,0 MHz .. . f
C
- 76,0 MHz
f
C
- 76,0 MHz .... f
C
- 85,0 MHz
f
C
- 85,0 MHz .... f
C
- 91,0 MHz
f
C
- 91,0 MHz .... f
C
- 720,0 MHz
f
C
+ 70,0 MHz .... f
C
+ 780,0
dB
Group delay ripple
GD**
f
C
鈥?4,0 MHz ... f
C
+ 4,0 MHz
15
ns
-32 ppm/K
-
-
- 40
擄C
... + 85
擄C
- 30 擄C ... + 80 擄C
Temperature coefficient of frequency ( Tc
f
)
Operating temperature range
Storage temperature range
*) 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.
**) Aperture 500 KHz
Generated:
Checked / approved:
TELEFILTER
GmbH
Potsdamer Stra脽e 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.
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