Low Pass Filter Electrical Specifications @ 25°C
Maximum Ratings
Operating Temperature -55°C to 100°C
Storage Temperature -55°C to 100°C
RF Power Input* 10W max. at 25°C
Typical Performance Data @ 25°C
Frequency
(MHz)
Insertion Loss
(dB)
VSWR
(:1)
Functional Schematic
RF IN RF OUT
*Passband rating, derate linearly to 3.5W at 100°C ambient.
Outline Dimensions ( )
inch
mm
B D E wt.
.39 2.67 .312 grams
9.91 67.82 7.92 17.0
MODEL
NO.
PASSBAND
(MHz)
(Loss < 1.2dB)
Max.
fco, MHz
Nom
(Loss 3 dB)
Typ
STOPBAND (MHz)
(Loss, dB)
VSWR (:1) NO. OF
SECTIONS
f20
Min.
f40
Typ.
Stopband
Typ.
Passband
Typ.
VLFX-780 DC-780 950 1450 1600-20000 10 1.25 21
Outline Drawing
Typical Frequency Response
FREQUENCY
>20 GHz
fco f20 f40
40 dB
ATTENUATION (dB)
20 dB
3 dB
1 dB
50 0.20 1.07
200 0.42 1.23
500 0.67 1.20
780 1.00 1.15
840 1.24 1.38
900 1.80 1.89
950 2.71 2.73
1050 5.85 6.43
1450 26.42 50.23
1600 38.96 69.51
1750 44.97 78.34
2000 47.85 88.41
2500 78.54 98.33
5000 69.60 89.14
7500 59.97 45.09
10000 74.94 28.77
12500 55.61 18.76
15000 45.26 1.23
17500 66.73 22.68
20000 62.04 8.82
Features
Applications
• harmonic rejection
• transmitters/receivers
• lab use
• test instrumentation
• very good isolation, 40 dB up to 20 GHz
• 21 sections
• excellent power handling, 10W
• temperature stable LTCC internal structure
• re-entry frequency > 20 GHz
• rugged stainless steel unibody
• protected by US patent 6,943,646
CASE STYLE: FF1118
Connectors Model Price Qty.
SMA VLFX-780-S $39.95 ea. (1-9)
INTERNET http://www.minicircuits.com
P.O. Box 350166, Brooklyn, New York 11235-0003 (718) 934-4500 Fax (718) 332-4661
Distribution Centers NORTH AMERICA 800-654-7949 • 417-335-5935 • Fax 417-335-5945 • EUROPE 44-1252-832600 • Fax 44-1252-837010
Mini-Circuits®
Mini-Circuits ISO 9001 & ISO 14001 Certified
DC to 780 MHz (40 dB Isolation up to 20 GHz)
Low Pass Filter
Coaxial
REV. A
M97025
VLFX-780
EDU-0399
ED-11930A/10
URJ/AD/CP
051229
VLFX-780
VLFX-780
INSERTION LOSS
0
10
20
30
40
50
60
70
80
90
0 4000 8000 12000 16000 20000
FREQUENCY (MHz)
INSERTION LOSS(dB)
VLFX-780
VSWR
1
10
100
1000
0 4000 8000 12000 16000 20000
FREQUENCY (MHz)
VSWR
