Datasheet AV850M2-A2 Datasheet (ALPHA)

Alpha Industries, Inc. [781] 935-5150 • Fax [617] 824-4579 • Email [e-mail] • www.alphaind.com 1

Specifications subject to change without notice. 6/00A

18–40 GHz Surface Mount
Voltage V ariable Attenuator

Features

■ Surface Mount Package

■ 30 dB Attenuation Range

■ +10 dBm P

1 dB

All Attenuation States

■ Low Insertion Loss

■ 100% RF and DC Testing

AV850M2-A2

Patent Pending

Description

The A V850M2-A2 is a broadband millimeterwav e v oltage
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 pac kage provides e xcellent
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 millimeterw av e applications such
as point-to-point and point-to-multipoint wireless
communications systems. Control voltage VC2sets the
attenuation level while VC1adjusts return loss for the part.

Parameter Symbol Min. Typ. Max. Unit

Bandwidth BW 18 40 GHz
Insertion Loss at Minimum Attenuation IL

Min

34dB

Insertion Loss at Maximum Attenuation IL

Max

27 33 dBm

Input Return Loss RL

I

10 dB

Output Return Loss RL

O

10 dB

Output Power at 1 dB Gain Compression (For All Attenuation Levels) P

1 dB

8 10 dBm

Temperature Coefficient of Attenuation dG/dT -0.002 dB/C

Electrical Specifications at 25°C

Parameter Symbol Min. Typ. Max. Unit

Control Current IC1+ I

C2

<1 mA

DC

RF

Pin Out

AV850M2-A2

YYWW

RF In RF Out

Orientation

Indicated by

Missing

Castellations

V

C2

N/C N/C

N/C V

C1

N/C

18–40 GHz Surface Mount Voltage Variable Attenuator AV850M2-A2

2 Alpha Industries, Inc. [781] 935-5150 • Fax [617] 824-4579 • Email [e-mail] • www.alphaind.com

Specifications subject to change without notice. 6/00A

Characteristic Value

Operating Temperature (TC) -55°C to +90°C
Storage Temperature (TST) -65°C to +150°C
Control Voltage (VC1) -7 V

DC

Control Voltage (VC2) -7 V

DC

Power In (PIN) 30 dBm

Absolute Maximum Ratings

Frequency (GHz)

Attenuation vs. Frequency

-40

-30

-20

-10

0

18 23 28 33 38

Attenuation (dB)

-0.5 V

-1.0 V

-1.5 V

-2 V

VC2 = -3 V

V

C2

= 0 V

Attenuation vs. Control Voltage

-45

-35

-25

-15

-5

-3 -2 -1 0

Control Voltage VC2 (V)

Attenuation (dB)

18 GHz

23 GHz

28 GHz

33 GHz

38 GHz

1 dB Compression vs. Attenuation

0

5

10

15

20

25

0 5 10 15 20 25 30

Attenuation (dB)

Input Power at 1 dB

Compression (dBm)

18 GHz

38 GHz

Typical Performance Data

Outline

0.241

(6.12 mm)

0.040

(1.02 mm)

0.016

(0.41 mm)

0.194

(4.93 mm)

0.056

(1.42 mm)

0.204

(5.18 mm)

0.251

(6.38 mm)

2X 0.044

(1.12 mm)

8X 0.020

(0.51 mm)

2X 0.129

(3.28 mm)

C

L

2X 0.064

(1.63 mm)

2X 0.043

(1.09 mm)

2X 0.085

(2.16 mm)

C

L

18–40 GHz Surface Mount Voltage Variable Attenuator AV850M2-A2

Alpha Industries, Inc. [781] 935-5150 • Fax [617] 824-4579 • Email [e-mail] • www.alphaind.com 3

Specifications subject to change without notice. 6/00A

Typical S-Parameters at 25°C (VC1= 0 V, VC2= -2.0 V)

Frequency

S

11

S

21

S

12

S

22

(GHz) Mag. (dB) Ang. (Deg.) Mag. (dB) Ang. (Deg.) Mag.(dB) Ang. (Deg.) Mag. (dB) Ang. (Deg.)

10 -14.37 38.2 -1.33 100.4 -1.32 100.5 -9.22 -62.9
12 -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)

Frequency

S

11

S

21

S

12

S

22

(GHz) Mag. (dB) Ang. (Deg.) Mag. (dB) Ang. (Deg.) Mag. (dB) Ang. (Deg.) Mag. (dB) Ang. (Deg.)

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

18–40 GHz Surface Mount Voltage Variable Attenuator AV850M2-A2

4 Alpha Industries, Inc. [781] 935-5150 • Fax [617] 824-4579 • Email [e-mail] • www.alphaind.com

Specifications subject to change without notice. 6/00A

“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.

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 pac kage 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

The Alpha Two surface mount pac kage 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.

Mounting the Package

The Alpha Two surface mount pac kage 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.

Alpha Two Surface Mount Package Installation

Printed Ccircuit Board

Rogers 4003

0.008" (0.20 mm) Thick

Electrically & Thermally

Conductive Ground Plane

RF In

RF Out

DC Lines

Solder Fillets

Footprint Geometry for Alpha Two

Surface Mount Package

RF In RF Out

DC Connections

DC Connections

64 Via Holes