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Hittite Microwave Corporation
Hittite Microwave Corporation

HMC812LC4 Datasheet Preview

HMC812LC4 Datasheet

Voltage Variable Attenuator SMT

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HMC812LC4 pdf
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v00.0309
HMC812LC4
GaAs MMIC VOLTAGE-VARIABLE
ATTENUATOR, 5 - 30 GHz
5
Typical Applications
The HMC812LC4 is ideal for:
• Point-to-Point Radio
• VSAT Radio
• Test Instrumentation
• Microwave Sensors
• Military, ECM & Radar
Functional Diagram
Features
Wide Bandwidth: 5 - 30 GHz
Excellent Linearity: +25 dBm Input P1dB
Wide Attenuation Range: 30 dB
24 Lead Ceramic 4x4mm SMT Package: 16mm2
General Description
The HMC812LC4 is an absorptive Voltage Variable
Attenuator (VVA) which operates from 5 - 30 GHz
and is ideal in designs where an analog DC control
signal must be used to control RF signal levels over a
30 dB amplitude range. It features two shunt-type
attenuators which are controlled by two analog vol-
tages, Vctrl1 and Vctrl2. Optimum linearity perfor-
mance of the attenuator is achieved by first varying
Vctrl1 of the 1st attenuation stage from -3V to 0V
with Vctrl2 fixed at -3V. The control voltage of the
2nd attenuation stage, Vctrl2, should then be varied
from -3V to 0V, with Vctrl1 fixed at 0V. The HMC812LC4
is housed in a RoHS compliant 4x4 mm QFN lead-
less ceramic package
However, if the Vctrl1 and Vctrl2 pins are connected
together it is possible to achieve the full analog atten-
uation range with only a small degradation in input
IP3 performance. Applications include AGC circuits
and temperature compensation of multiple gain stages
in microwave point-to-point and VSAT radios.
Electrical Specifications, TA = +25° C, 50 Ohm system
Parameter
Min.
Typ.
Max.
Units
Insertion Loss
5 - 16 GHz
16 - 24 GHz
24 - 30 GHz
2
3
4
dB
dB
dB
Attenuation Range
30 dB
Input Return Loss
12 dB
Output Return Loss
8 dB
Input Power for 1 dB Compression (any attenuation)
25 dBm
Input Third Order Intercept
(Two-tone Input Power = 10 dBm Each Tone)
28 dBm
5 - 218
For price, delivery, and to place orders, please contact Hittite Microwave Corporation:
20 Alpha Road, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373
Order On-line at www.hittite.com



Hittite Microwave Corporation
Hittite Microwave Corporation

HMC812LC4 Datasheet Preview

HMC812LC4 Datasheet

Voltage Variable Attenuator SMT

No Preview Available !

HMC812LC4 pdf
www.DataSheet4U.com
v00.0309
Attenuation vs. Frequency over Vctrl
Vctrl1 = Variable, Vctrl2 = -3V
0
-5
-10
-15
-20
-25
2
-3.0 V
-1.8 V
-1.4 V
-0.8 V
0.0 V
6 10 14 18 22 26 30
FREQUENCY (GHz)
Attenuation vs. Vctrl1
Over Temperature @ 10 GHz, Vctrl2 = -3V
0
-3
-6
-9
+25 C
-12 +85 C
-40 C
-15
-3 -2.5 -2 -1.5 -1 -0.5 0
Vctrl1 (V)
Attenuation vs. Pin @ 10 GHz
Vctrl1 = Variable, Vctrl2 = -3V
0
-3
-6
-9
-12
-15
-3.0 V
-0.8 V
-1.8 V
0.0 V
-1.4 V
-18
0 3 6 9 12 15
INPUT POWER (dBm)
18
HMC812LC4
GaAs MMIC VOLTAGE-VARIABLE
ATTENUATOR, 5 - 30 GHz
Attenuation vs. Frequency over Vctrl
Vctrl1 = 0V, Vctrl2 = Variable
0
-10
-20
-30
-40
-50
2
-3.0 V
-2.0 V
-1.6 V
-1.0 V
0.0 V
6 10 14 18 22 26 30
FREQUENCY (GHz)
Attenuation vs. Vctrl2
Over Temperature @ 10 GHz, Vctrl1 = 0V
0
-5
+25 C
+85 C
-10 -40 C
-15
-20
-25
-30
-35
-3 -2.5 -2 -1.5 -1 -0.5 0
Vctrl2 (V)
Input Return Loss
Vctrl1 = Variable, Vctrl2 = -3V
0
-10
-20
-30
-40
2
-3.0 V
-1.6 V
0.0 V
6 10 14 18 22 26 30
FREQUENCY (GHz)
5
For price, delivery, and to place orders, please contact Hittite Microwave Corporation:
20 Alpha Road, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373
Order On-line at www.hittite.com
5 - 219


Part Number HMC812LC4
Description Voltage Variable Attenuator SMT
Maker Hittite Microwave Corporation
Total Page 8 Pages
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