产品名称：
型号：LB4
描述：
SERIES NUMBER:LB4
NUMBER OF POLES:4
INSERTION LOSS at 0.1 x f -3dBc dB MAXIMUM:0.5
STOPBAND
ATTENUATION dBc MINIMUM:-45
FREQUENCY:4.0 x f
-3dBc
NOTES:
Operating Temperature Range:
0°C to +70°C
Number of Poles: 3 to 11
VSWRTypical
Input Power: 20 mW
Case Type: Refer to Case Selection Guide
Case Options: PCB, SMT, BNC or SMA
Normalized Response: Refer to Graphs
Product Info: Refer to LB Series
TERMINATIONS:
50 Ω 100 MHz - 2 GHz
50 Ω or 75 Ω 300 kHz - 100 MHz
1 k&Omegamega; 10 kHz - 300 kHz
10 kΩ - 1 kΩ 100 Hz - 10 kHz
STOPBAND FREQUENCY CALCULATIONS:
Using part number LB7-125M-50-3A, we know that
the filter is a 7 pole Butterworth lowpass filter.
Scroll down to series number LB7. Moving to the
right we find the stopband specification listed as
-60dBc minimum at 2.8 x f -3dBc. Thus, the -60dBc
frequency is at 350 MHz (2.8 x 125 MHz).
PART NUMBER DERIVATION:
LB7 *(R) -125M -50 -3A
nbsp;
1) Series, LB
2) Number of poles, 7
3) “R” RoHS compliant. Allow for longer lead time.
4) f-3dBc
5) Terminations
6) Case selection from the case selection guide.