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Hittite Microwave Corporation

HMC712 Datasheet Preview

HMC712 Datasheet

Voltage Variable Attenuator Chip

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v00.1008
1 Typical Applications
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The HMC712 is ideal for:
• Point-to-Point Radio
• VSAT Radio
• Test Instrumentation
• Microwave Sensors
• Military, ECM & Radar
Functional Diagram
HMC712
GaAs MMIC VOLTAGE-VARIABLE
ATTENUATOR, 5 - 30 GHz
Features
Wide Bandwidth: 5 - 30 GHz
Excellent Linearity: +28 dBm Input P1dB
Wide Attenuation Range: 30 dB
Compact Die Size: 1.4 x 1.2 x 0.1 mm
General Description
The HMC712 die 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 voltages, Vctrl1
and Vctrl2. Optimum linearity performance 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.
However, if the Vctrl1 and Vctrl2 pins are connected
together it is possible to achieve the full analog
attenuation 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
2.5
3.5
4.5
dB
dB
dB
Attenuation Range
30 dB
Input Return Loss
12 dB
Output Return Loss
10 dB
Input Power for 1 dB Compression (any attenuation)
28 dBm
Input Third Order Intercept
(Two-tone Input Power = 10 dBm Each Tone)
32 dBm
1 - 38
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

HMC712 Datasheet Preview

HMC712 Datasheet

Voltage Variable Attenuator Chip

No Preview Available !

v00.1008
Attenuation vs. Frequency over Vctrl
Vctrl1 = Variable, Vctrl2 = -3V
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-5
-10
-15
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
-2
-4
-6
-8
+25 C
+85 C
-55 C
-10
-3 -2.5 -2 -1.5 -1 -0.5 0
Vctrl1 (V)
Attenuation vs. Pin @ 10 GHz
Vctrl1 = Variable, Vctrl2 = -3V
0
-2
-4
-6
-8
-10
0
-3.0 V
-1.8 V
-1.2 V
-0.6 V
0.0 V
5 10 15
INPUT POWER (dBm)
20
HMC712
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
-1.8 V
-1.4 V
-0.8 V
0.0 V
6 10 14 18 22 26 30
FREQUENCY (GHz)
Attenuation vs. Vctrl2
Over Temperature @ 10 GHz, Vctrl1 = 0V
0
-5
-10
-15
-20 +25 C
+85 C
-25 -55 C
-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
-50
2
-3.0 V
-1.6 V
0.0 V
6 10 14 18 22 26 30
FREQUENCY (GHz)
1
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
1 - 39


Part Number HMC712
Description Voltage Variable Attenuator Chip
Maker Hittite Microwave Corporation
Total Page 8 Pages
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