HMC712
v01.0709
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
1
ATTENUATORS - ANALOG - CHIP
Typical Applications
The HMC712 is ideal for:
• Point-to-Point Radio
• VSAT Radio
• Test Instrumentation
• Microwave Sensors
• Military, ECM & Radar
Functional Diagram
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 Specifi cations,
T
A
= +25° C, 50 Ohm system
Parameter
Insertion Loss
Attenuation Range
Input Return Loss
Output Return Loss
Input Power for 1 dB Compression (any attenuation)
Input Third Order Intercept
(Two-tone Input Power = 10 dBm Each Tone)
5 - 16 GHz
16 - 24 GHz
24 - 30 GHz
Min.
Typ.
2.5
3.5
4.5
30
12
10
28
32
Max.
Units
dB
dB
dB
dB
dB
dB
dBm
dBm
1 - 20
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
HMC712
v01.0709
GaAs MMIC VOLTAGE-VARIABLE
ATTENUATOR, 5 - 30 GHz
Attenuation vs. Frequency over Vctrl
Vctrl1 = Variable, Vctrl2 = -3V
0
Attenuation vs. Frequency over Vctrl
Vctrl1 = 0V, Vctrl2 = Variable
0
1
ATTENUATORS - ANALOG - CHIP
-10
ATTENUATION (dB)
-5
ATTENUATION (dB)
-20
-30
-3.0 V
-1.8 V
-1.4 V
-0.8 V
0.0 V
-10
-3.0 V
-1.8 V
-1.4 V
-0.8 V
0.0 V
-40
-15
2
6
10
14
18
22
26
30
FREQUENCY (GHz)
-50
2
6
10
14
18
22
26
30
FREQUENCY (GHz)
Attenuation vs. Vctrl1
Over Temperature @ 10 GHz, Vctrl2 = -3V
0
Attenuation vs. Vctrl2
Over Temperature @ 10 GHz, Vctrl1 = 0V
0
-5
-2
ATTENUATION (dB)
ATTENUATION (dB)
-10
-15
-20
-25
-30
-35
-3
-2.5
-2
-1.5
Vctrl1 (V)
-1
-0.5
0
-3
-2.5
-2
-1.5
Vctrl2 (V)
-1
-0.5
0
+25 C
+85 C
-55 C
-4
-6
+25 C
+85 C
-55 C
-8
-10
Attenuation vs. Pin @ 10 GHz
Vctrl1 = Variable, Vctrl2 = -3V
0
-2
ATTENUATION (dB)
-4
-6
-8
-3.0 V
-1.8 V
-1.2 V
-0.6 V
0.0 V
-10
0
5
10
INPUT POWER (dBm)
15
20
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 - 21
HMC712
v01.0709
GaAs MMIC VOLTAGE-VARIABLE
ATTENUATOR, 5 - 30 GHz
1
ATTENUATORS - ANALOG - CHIP
Insertion Phase vs. Vctrl1, Vctrl2 = -3V
180
INSERTION PHASE (degrees)
135
90
45
0
-45
-90
-135
-180
-3
2 GHz
5 GHz
10 GHz
20 GHz
25 GHz
Insertion Phase vs. Vctrl2, Vctrl1 = 0V
180
135
INSERTION PHASE (degrees)
90
45
0
-45
-90
-135
-180
-225
2 GHz
5 GHz
10 GHz
20 GHz
25 GHz
-2.5
-2
-1.5
VCTRL 1
-1
-0.5
0
-3
-2.5
-2
-1.5
VCTRL 2
-1
-0.5
0
Input Return Loss
Vctrl1 = Variable, Vctrl2 = -3V
0
Input Return Loss
Vctrl1 = 0V, Vctrl2 = Variable
0
-10
RETURN LOSS (dB)
RETURN LOSS (dB)
-10
-20
-20
-30
-3.0 V
-1.6 V
0.0 V
-30
-40
-3.0 V
-1.6 V
0.0 V
-50
2
6
10
14
18
22
26
30
FREQUENCY (GHz)
-40
2
6
10
14
18
22
26
30
FREQUENCY (GHz)
Output Return Loss
Vctrl1 = Variable, Vctrl2 = -3V
0
Output Return Loss
Vctrl1 = 0V, Vctrl2 = Variable
0
RETURN LOSS (dB)
-10
RETURN LOSS (dB)
-3.0 V
-1.6 V
0.0 V
-10
-20
-20
-3.0 V
-1.6 V
0.0 V
-30
2
6
10
14
18
22
26
30
FREQUENCY (GHz)
-30
2
6
10
14
18
22
26
30
FREQUENCY (GHz)
1 - 22
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
HMC712
v01.0709
GaAs MMIC VOLTAGE-VARIABLE
ATTENUATOR, 5 - 30 GHz
Input IP3 vs Input Power @ 10 GHz
Vctrl1 = Variable, Vctrl2 = -3V
60
Input IP3 vs. Input Power Over Frequency
Vctrl1 = -2.2V, Vctrl2 = -3V (Worst Case IP3)
40
1
ATTENUATORS - ANALOG - CHIP
50
35
IP3 (dBm)
IP3 (dBm)
40
30
10 GHz
15 GHz
20 GHz
25 GHz
30
-3.0 V
-2.4 V
-2.2 V
-1.8 V
0.0 V
25
20
10
0
5
10
15
20
SINGLE TONE INPUT POWER (dBm)
20
0
5
10
15
20
SINGLE TONE INPUT POWER (dBm)
Input IP3 vs. Input Power Over Temperature
@ 10 GHz, Vctrl1 = -2.2V, Vctrl2 = -3V
40
Attenuation vs. Frequency over Vctrl
Vctrl1 = Vctrl2
0
-10
35
IP3 (dBm)
ATTENUATION (dB)
-20
-30
-3 V
-1.8 V
-1.4 V
-0.8 V
0V
30
+25 C
+85 C
-55 C
-40
25
0
5
10
15
20
SINGLE TONE INPUT POWER (dBm)
-50
2
9
16
FREQUENCY (GHz)
23
30
Attenuation vs. Vctrl over Temperature
@ 10 GHz, Vctrl1 = Vctrl2
0
Attenuation vs. Input Power over Vctrl
Vctrl1 = Vctrl2
0
-10
ATTENUATION (dB)
ATTENUATION (dB)
-10
-20
-20
+25 C
+85 C
-40 C
-30
-30
-40
-3 V
-1.8 V
-1.4 V
-.8 V
0V
-40
-3
-2.5
-2
-1.5
-1
-0.5
0
CONTROL VOLTAGE (V)
-50
0
5
10
INPUT POWER (dBm)
15
20
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 - 23
HMC712
v01.0709
GaAs MMIC VOLTAGE-VARIABLE
ATTENUATOR, 5 - 30 GHz
1
ATTENUATORS - ANALOG - CHIP
Input Return Loss, Vctrl1 = Vctrl2
0
Output Return Loss, Vctrl1 = Vctrl2
0
RETURN LOSS (dB)
-20
RETURN LOSS (dB)
-10
-10
-20
-30
-3.0 V
-1.8 V
0.0 V
-30
-3.0 V
-1.8 V
0.0 V
-40
2
6
10
14
18
22
26
30
FREQUENCY (GHz)
-40
2
6
10
14
18
22
26
30
FREQUENCY (GHz)
Input IP3 vs. Input Power Over
Vctrl @ 10 GHz, Vctrl1 = Vctrl2
60
50
40
IP3 (dBm)
30
20
10
0
0
5
10
15
20
SINGLE TONE INPUT POWER (dBm)
-2.6 V
-2.2 V
-1.8 V
-1.4 V
0V
Absolute Maximum Ratings
RF Input Power
Control Voltage Range
Channel Temperature
Thermal Resistance
(Channel to die bottom)
Storage Temperature
Operating Temperature
+30 dBm
+1 to -5V
150 °C
64 °C/W
-65 to +150 °C
-55 to +85 °C
Control Voltages
Vctrl1
Vctrl2
-3 to 0V @ 10 μA
-3 to 0V @ 10 μA
ELECTROSTATIC SENSITIVE DEVICE
OBSERVE HANDLING PRECAUTIONS
1 - 24
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
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