TFS125G.pdf Datasheet, PDF (1/5 Pages) –

tfs125g.doc
VI TELEFILTER
Filter Specification
version 1.2
TFS 125 G
05.11.2002
1/5
Measurement Condition
Ambient temperature:
23 C
Input power level:
0 dBm
Source impedance:
200 balanced
Load impedance:
50 single ended
Terminating impedances: *) input: 880 // -11,0 pF
output: 890 // -12,6 pF
Characteristics
Remark: Reference level for the relative attenuation arel of the TFS 125G is the attenuation at 125 MHz. Reference for the echo response
attenuation is the main time response lobe, the reference time is defined as t0. The nominal frequency fN is fixed at 125 MHz without tolerance.
The given values for the relative attenuation arel and for 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
typ. Value
Limit
Absolute attenuation within fN 0,1 MHz
8 dB
7 ...10 dB
Nominal frequency fN
-
125 MHz
Pass band ripple
fN .....
fN
fN 0,1 MHz ... fN
fN 0,2 MHz ... fN
1 dB-bandwidth
0,1 MHz
0,2 MHz
0,5 MHz
-
-
-
1235 kHz
max.
max.
max.
0,25 dB
0,5 dB
1 dB
min. 1000 kHz
Relative attenuation
arel
fN
... fN 0,5 MHz
fN 1,2 MHz ... fN 1,8 MHz
fN 1,8 MHz ... fN 6 MHz
fN 6 MHz ... fN 13 MHz
fN - 13 MHz ... fN - 115 MHz
fN + 13 MHz ... fN + 325 MHz
-
-
30 dB
50 dB
60 dB
65 dB
max. 1 dB
min. 9 dB
min. 25 dB
min. 35 dB
min. 50 dB
min. 50 dB
Echo response attenuation arel
t0 + 2 µs
t0 + 3 µs
t0 + 4 µs
t0 + 5 µs
t0 + 6 µs
Group delay
@ fN
Group delay ripple within fN 0,5 MHz
42 dB
43 dB
56 dB
70 dB
75 dB
705 ns
120 ns
min. 30 dB
min. 40 dB
min. 50 dB
min. 55 dB
min. 60 dB
max. 750 ns
max. 150 ns
Input power level
-
max. + 10 dBm
VSWR
within fN 0,5 MHz
-
min. 2:1
Intermodulation products
62 dBm
min. 60 dBm
Operating temperature range
Storage temperature range
Temperature coefficient of frequency
Frequency inversion temperature
TCf ***
T0
-0,036 ppm/K²
30
°C
- 10 °C ... + 85 °C
- 40 °C ... + 125 °C
-
-
ö÷ 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.
**) fin,1=125MHz; fin,2=125,1MHz; Pin=4dBm+loss @fN; fout,1=124,9MHz; fout,2=125,2MHz; then Pout <-56dBm
***) f(Hz) = TCf(ppm/K²) x (T-T0)² x fTo(MHz)
generated:
checked / approved:
______________________________________________________________________________________________________
VI TELEFILTER
Potsdamer Straße 18
D 14 513 TELTOW / Germany
Tel: [phone] / Fax: [phone]
E-Mail: [e-mail]
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.