ALPHA AV850M2-A2

18–40 GHz Surface Mount
Voltage Variable Attenuator
AV850M2-A2
Patent Pending
Features
■ Surface Mount Package
■ 30 dB Attenuation Range
■ +10 dBm P1 dB All Attenuation States
■ Low Insertion Loss
■ 100% RF and DC Testing
Description
The AV850M2-A2 is a broadband millimeterwave voltage
variable attenuator in a rugged surface mount package
that is compatible with high-volume solder installation. The
attenuator is designed for use in millimeterwave
communication and sensor systems as a variable
attenuation stage in the receiver or transmitter chain when
wide dynamic range and high linearity are required. The
robust ceramic surface mount package provides excellent
electrical performance and a high degree of
environmental protection for long-term reliability. All
attenuators are screened at the operating frequencies prior
to shipment for guaranteed performance. Attenuator is
targeted for high-volume millimeterwave applications such
as point-to-point and point-to-multipoint wireless
communications systems. Control voltage VC2 sets the
attenuation level while VC1 adjusts return loss for the part.
Pin Out
N/C VC2 N/C
RF In
RF Out
AV850M2-A2
YYWW
Orientation
Indicated by
Missing
Castellations
N/C VC1 N/C
Electrical Specifications at 25°C
RF
Parameter
Symbol
Min.
BW
18
Bandwidth
Insertion Loss at Minimum Attenuation
ILMin
Insertion Loss at Maximum Attenuation
ILMax
Typ.
3
27
Max.
Unit
40
GHz
4
dB
33
dBm
Input Return Loss
RLI
10
dB
Output Return Loss
RLO
10
dB
Output Power at 1 dB Gain Compression (For All Attenuation Levels)
P1 dB
Temperature Coefficient of Attenuation
dG/dT
8
10
dBm
-0.002
dB/C
DC
Parameter
Control Current
Symbol
IC1 + IC2
Min.
Typ.
<1
Alpha Industries, Inc. [781] 935-5150 • Fax [617] 824-4579 • Email [email protected]d.com • www.alphaind.com
Specifications subject to change without notice. 6/00A
Max.
Unit
mA
1
18–40 GHz Surface Mount Voltage Variable Attenuator
AV850M2-A2
Typical Performance Data
0
25
VC2 = -3 V
18 GHz
Input Power at 1 dB
Compression (dBm)
Attenuation (dB)
-2 V
-10
-1.5 V
-1.0 V
-20
-0.5 V
-30
20
15
10
38 GHz
5
VC2 = 0 V
0
-40
18
23
28
33
0
38
10
15
20
25
Frequency (GHz)
Attenuation vs. Frequency
1 dB Compression vs. Attenuation
Absolute Maximum Ratings
Characteristic
18 GHz
-15
23 GHz
-25
28 GHz
-35
Value
Operating Temperature (TC)
-55°C to +90°C
Storage Temperature (TST)
-65°C to +150°C
Control Voltage (VC1)
-7 VDC
Control Voltage (VC2)
-7 VDC
Power In (PIN)
30 dBm
33 GHz
38 GHz
-45
-3
-2
-1
0
Control Voltage VC2 (V)
Attenuation vs. Control Voltage
Outline
2X 0.085
(2.16 mm)
0.251
(6.38 mm)
2X 0.044
(1.12 mm)
0.204
(5.18 mm)
8X 0.020
(0.51 mm)
C
L
2X 0.129
(3.28 mm)
0.056
(1.42 mm)
2
2X 0.043
(1.09 mm)
C
L
2X 0.064
(1.63 mm)
0.194
(4.93 mm)
30
Attenuation (dB)
-5
Attenuation (dB)
5
0.016
(0.41 mm)
0.241
(6.12 mm)
0.040
(1.02 mm)
Alpha Industries, Inc. [781] 935-5150 • Fax [617] 824-4579 • Email [email protected] • www.alphaind.com
Specifications subject to change without notice. 6/00A
18–40 GHz Surface Mount Voltage Variable Attenuator
AV850M2-A2
Typical S-Parameters at 25°C (VC1 = 0 V, VC2 = -2.0 V)
S11
Frequency
(GHz)
Mag. (dB)
10
12
S21
S12
S22
Ang. (Deg.)
Mag. (dB)
Ang. (Deg.)
Mag. (dB)
Ang. (Deg.)
Mag. (dB)
Ang. (Deg.)
-14.37
38.2
-1.33
100.4
-1.32
100.5
-9.22
-62.9
-10.98
-26.8
-1.64
48.7
-1.64
48.9
-8.79
-98.0
14
-8.31
-97.9
-1.94
-1.6
-1.91
-1.3
-9.30
-128.6
16
-9.35
-139.2
-4.78
-57.2
-4.80
-57.1
-11.69
-154.9
18
-14.03
-170.7
-4.90
-112.0
-4.94
-112.1
-16.49
-155.6
20
-18.93
-133.4
-5.43
-167.8
-5.46
-167.9
-14.19
-128.9
22
-12.60
-133.0
-6.20
137.5
-5.99
138.1
-10.86
-150.9
24
-10.72
-160.2
-6.69
85.1
-6.41
85.3
-11.50
179.0
26
-11.51
-178.6
-7.04
31.5
-6.80
31.5
-16.43
163.2
28
-11.48
173.2
-7.76
-24.1
-7.75
-23.9
-17.54
-159.4
30
-10.31
158.3
-8.60
-77.1
-8.33
-77.0
-12.63
-174.8
32
-10.67
137.2
-8.99
-130.8
-8.54
-131.2
-12.30
151.0
34
-12.16
125.6
-9.03
174.1
-8.96
173.1
-14.97
115.2
36
-12.40
120.7
-9.57
115.3
-9.58
114.4
-22.73
66.2
38
-11.55
108.5
-10.37
54.3
-10.06
53.8
-27.99
-73.0
40
-11.20
78.8
-10.96
-8.8
-10.40
-11.0
-18.34
-114.6
42
-12.60
49.9
-11.74
-79.2
-11.93
-80.8
-13.31
-137.7
44
-13.69
-163.7
-16.18
-170.9
-16.25
-171.4
-8.52
-158.5
46
-1.17
91.4
-21.20
-117.9
-20.84
-125.3
-1.21
132.6
48
-3.80
13.8
-16.82
142.0
-17.75
140.9
-2.88
63.1
50
-6.06
-20.5
-18.90
69.6
-18.69
67.7
-5.77
-1.7
Typical S-Parameters at 25°C (VC1 = 0 V, VC2 = -1.5 V)
S11
S21
S12
S22
Frequency
(GHz)
Mag. (dB)
Ang. (Deg.)
Mag. (dB)
Ang. (Deg.)
Mag. (dB)
Ang. (Deg.)
Mag. (dB)
10
-10.75
-12.4
-4.64
98.3
-4.63
98.4
-5.28
-76.6
12
-9.15
-54.8
-4.88
46.6
-4.74
46.7
-5.86
-115.3
14
-6.20
-95.6
-13.10
-8.1
-13.19
-7.7
-7.30
-150.7
16
-6.78
-126.0
-13.60
-60.1
-13.41
-59.8
-10.21
175.2
18
-7.73
-151.5
-13.88
-113.4
-13.55
-113.2
-17.10
142.1
20
-8.76
-172.7
-14.32
-167.4
-14.31
-167.6
-27.30
-78.3
22
-9.99
166.5
-15.36
138.6
-15.49
138.7
-14.32
-103.7
24
-12.10
148.4
-16.59
84.8
-16.42
84.9
-10.57
-129.9
26
-15.52
135.5
-17.65
32.0
-17.23
32.1
-9.06
-156.0
28
-20.66
134.9
-18.59
-19.7
-18.57
-19.1
-9.05
176.8
30
-20.36
178.8
-19.68
-72.6
-19.38
-72.9
-9.43
149.7
32
-15.81
-177.1
-20.60
-127.5
-20.15
-128.3
-10.93
115.0
34
-12.49
172.3
-21.70
177.9
-21.85
177.7
-14.17
69.5
36
-10.17
151.7
-23.16
122.6
-22.76
122.0
-16.34
-7.0
38
-8.90
129.3
-24.30
62.1
-23.75
60.9
-13.69
-82.6
40
-8.01
97.7
-25.88
-0.2
-26.17
-3.5
-10.76
-131.7
42
-8.54
63.5
-28.12
-64.0
-28.13
-65.7
-9.37
-170.3
44
-19.54
-160.6
-31.87
-163.0
-30.84
-159.6
-10.51
174.9
46
-0.14
91.4
-45.47
-81.4
-48.12
-107.4
-0.44
129.9
48
-1.73
11.0
-34.72
173.4
-36.37
173.9
-1.55
49.4
50
-3.65
-27.5
-35.09
97.1
-36.54
102.4
-4.82
-18.549
Alpha Industries, Inc. [781] 935-5150 • Fax [617] 824-4579 • Email [email protected] • www.alphaind.com
Specifications subject to change without notice. 6/00A
Ang. (Deg.)
3
18–40 GHz Surface Mount Voltage Variable Attenuator
AV850M2-A2
“Alpha Two” Surface Mount Package
Handling and Mounting
Millimeterwave components require careful mounting
design to maintain optimal performance. The Alpha Two
surface mount package (patent pending) provides a
rugged and repeatable electrical connection using
standard solder techniques.
DC Connections
64 Via Holes
RF In
RF Out
Handling
The Alpha Two surface mount package is very rugged.
However, due to ceramic’s brittle nature, one should
exercise care when handling with metal tools. Do not apply
heavy pressure to the lid. Vacuum tools may be used to
pick and place this part.
Only personnel trained in both ESD precautions and
handling precautions should be allowed to handle these
packages.
Package Construction
The Alpha Two surface mount package consists of a base
and a lid. The package base is ceramic with filled vias and
plated castellations. The package lid is unplated alumina.
The lid seal is epoxy.
Mounting Design
DC Connections
Footprint Geometry for Alpha Two
Surface Mount Package
Mounting the Package
The Alpha Two surface mount package is compatible with
high-volume surface mount installation using solder. RF
and DC connections are accomplished with metallized
edge castellations that hold solder fillets. Ground
connections are accomplished by both metallized edge
castellations and filled vias to the bottom of the package.
Care should be taken to ensure that there are no voids
or gaps in the solder so that a good RF, DC, and ground
contact is maintained.
The Alpha Two surface mount package is installed on top
of a printed circuit board on a specially designed footprint.
Mounting footprint geometry will be supplied by Alpha
Industries in electronic formats or paper drawing.
DC Lines
RF In
Printed Ccircuit Board
Rogers 4003
0.008" (0.20 mm) Thick
Solder Fillets
RF Out
Electrically & Thermally
Conductive Ground Plane
Alpha Two Surface Mount Package Installation
4
Alpha Industries, Inc. [781] 935-5150 • Fax [617] 824-4579 • Email [email protected] • www.alphaind.com
Specifications subject to change without notice. 6/00A