TFS 76.doc
Version 1.2
01.03.2002
VI TELEFILTER
1. Measurement condition
Ambient temperature
T
A
:
Input power level:
Terminating impedances at fc
*):
23 °C
0 dBm
for input:
for output:
Filter Specification
TFS 76
1/5
56
Ω
// 28,5 pF
50
Ω
// 0 pF
2. Characteristics
Remark:
Reference level for the relative attenuation
arel
of the
TFS 76
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 1 dB filter attenuation level relative to the insertion loss ae. The temperature coefficient of frequency Tc
f
is valid for both the
reference frequency fc and the frequency response of the filter in the operating temperature range.
Data
Insertion Loss
(Reference level)
ae
typ. value
20,8
dB
tolerance / limit
max.
23
dB
Centre Frequency
at ambient temperature
fC
Passband
Relative Attenuation
fc
fc ±
fc ±
fc ±
fc -
fc +
.......... fc ±
3,20 MHz .......... fc ±
3,65 MHz .......... fc ±
4,85 MHz .......... fc ±
71,8 MHz ......... fc -
PB
76,8 MHz
±
fc
±
75
kHz
3,2 MHz
arel
3,20 MHz
3,50 MHz
4,85 MHz
5,00 MHz
5,00 MHz
61
65
55
0,2
60
1,9
- 76
dB
dB
dB
°rms
ns
µs
ppm/K
- 0 °C ... + 70
- 20 °C ... + 80
°C
°C
0,35
dB
max.
max.
min.
min.
min.
min.
max.
0,7 dB
1
1
51
50
50
2
dB
dB
dB
dB
dB
°rms
ns
µs
5,00 MHz ......... fc + 123,20 MHz
Deviation from Linear Phase in PB
Group Delay Ripple in PB
Average Group Delay in PB
Temperature Coefficient of Frequency
Operating Temperature Range
Storage Temperature Range
max. 100
max.
3
*) 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.
generated:
checked / approved:
VI TELEFILTER
Potsdamer Straße 18
D 14 513 TELTOW / Germany
Tel: (+49) 3328 4784-0 / Fax: (+49) 3328 4784-30
E-Mail:
tft@telefilter.com
Vectron International, Inc.
267 Lowell Road
Hudson, NH 03051 / USA
Tel: (603) 598-0070 Fax: (603) 598-0075
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.
VECTRON [ Vectron International, Inc ]
