HMC985LP4KE
v01.0813
attenuators - analog - SMT
GaAs MMIC VOLTAGE - VARIABLE
ATTENUATOR, 10 - 40 GHz
Typical Applications
Features
The HMC985LP4KE is ideal for:
Wide Bandwidth: 10 - 40 GHz
• Point-to-Point Radio
Excellent Linearity: +32 dB Input IP3
Wide Attenuation Range: 35 dB
• VSAT Radio
No External Matching
• Test Instrumentation
24 Lead 4x4 mm SMT Package: 16 mm²
• Microwave Sensors
• Military, ECM & Radar
General Description
The HMC985LP4KE is an absorptive Voltage Variable
Attenuator (VVA) which operates from 10 - 40 GHz and
is ideal in designs where an analog DC control signal
must be used to control RF signal levels over a 35 dB
dynamic range. It features two shunt-type attenuators
which are controlled by two analog voltages, Vctl1 and
Vctl2. Optimum linearity performance of the attenuator
is achieved by first varying Vctl1 of the first attenuation
stage from -3V to 0V with Vctl2 fixed at -3V. The control
voltage of the second attenuation stage, Vctl2, should
then be varied from -3V to 0V with Vctl1 fixed at 0V.
Functional Diagram
if the Vctl1 and Vctl2 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, Test Condition Vctl1 = Vctl2
Parameter
Insertion Loss [1]
Typ.
Max.
10 - 20 GHz
Frequency
Min.
3
3.5
dB
20 - 30 GHz
3
4
dB
3.5
4.5
dB
30 -40 GHz
Attenuation Range
Units
10 - 20 GHz
25
30
dB
20 - 30 GHz
30
35
dB
30 - 40 GHz
35
40
dB
Input Return Loss
10 - 40 GHz
13
dB
Output Return Loss
10 - 40 GHz
13
dB
33
dBm
Input Third Order Intercept
(two-tone input Power = 10 dBm Each Tone) [2]
[1] Vcntl1 = Vcntl2 =-2.4V
[2] Vcntl1 = Vcntl2 =-2.0V worst case
1
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
For price, 2delivery,
and to
placeChelmsford,
orders: Analog MA
Devices,
Inc.,
For price,
delivery
and
to place
orders:
Microwave
Corporation,
Elizabeth
Drive,
01824
responsibility
is assumed
by Analog
Devices
for its use,
nor for anyHittite
infringements
of patents or other
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106
rights of third parties that may result from its use. Specifications subject to change without notice. No
Phone: 978-250-3343
Fax: 978-250-3373 Phone:
Order781-329-4700
On-line at www.hittite.com
• Order online at www.analog.com
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Application
Support: Phone: 1-800-ANALOG-D
Trademarks and registered trademarks are
the property of their
respective owners.
Application
Support:
Phone: 978-250-3343
or apps@hittite.com
HMC985LP4KE
v01.0813
Gaas mmic voltage - variable
attenuator, 10 - 40 GHz
Attenuation vs. Frequency over Vctl1 =
Variable, Vctl2 = -3V
Attenuation vs. Frequency over Vctl1 =
0V, Vctl2 = Variable
0
-10
ATTENUATION (dB)
ATTENUATION (dB)
-5
-10
-15
-20
-30
-40
-50
-20
-60
-25
-70
10
15
20
25
30
35
40
10
15
20
FREQUENCY (GHz)
-2.4V
-2.0V
-1.6V
25
30
35
40
FREQUENCY (GHz)
-1.2V
-0.8V
-0.4V
0.0V
-2.4V
-2.0V
-1.6V
Attenuation vs. Vctl1
Over Temperature @ 25 GHz, Vctl2 = -3V
-1.2V
-0.8V
-0.4V
0.0V
Attenuation vs. Vctl2
Over Temperature @ 30 GHz, Vctl1 = 0V
0
0
-5
-10
ATTENUATION (dB)
ATTENUATION (dB)
-3
-6
-9
-15
-20
-25
-30
-35
-12
attenuators - analog - SMT
0
-40
-15
-2.4
-2
-1.6
-1.2
-0.8
-0.4
0
-45
-2.4
-2
-1.6
+25 C
+85 C
+25 C
-40 C
Attenuation vs. Pin @ 20 GHz over Vctl1
Vctl1 = Variable, Vctl2 = -3V
-0.8
-0.4
0
+85 C
-40 C
Attenuation vs. Pin @ 20 GHz over Vctl2
Vctl2 = Variable, Vctl1 = 0V
0
0
-4
-10
ATTENUATION (dB)
ATTENUATION (dB)
-1.2
Vctrl1 (V)
Vctrl1 (V)
-8
-12
-16
-20
-30
-40
-20
-24
-50
-5
-1
3
7
11
15
-5
-1
3
INPUT POWER (dBm)
-2.4V
-2.0V
-1.6V
-1.2V
-0.8V
-0.4V
7
11
15
INPUT POWER (dBm)
0.0V
-2.4V
-2.0V
-1.6V
-1.2V
-0.8V
-0.4V
0.0V
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
For price, 2delivery,
and to
placeChelmsford,
orders: Analog MA
Devices,
Inc.,
For price,
delivery
and
to place
orders:
Microwave
Corporation,
Elizabeth
Drive,
01824
responsibility
is assumed
by Analog
Devices
for its use,
nor for anyHittite
infringements
of patents or other
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106
rights of third parties that may result from its use. Specifications subject to change without notice. No
Phone: 978-250-3343
Fax: 978-250-3373 Phone:
Order781-329-4700
On-line at www.hittite.com
• Order online at www.analog.com
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Application
Support: Phone: 1-800-ANALOG-D
Trademarks and registered trademarks are
the property of their
respective owners.
Application
Support:
Phone: 978-250-3343
or apps@hittite.com
2
HMC985LP4KE
v01.0813
Gaas mmic voltage - variable
attenuator, 10 - 40 GHz
0
0
-10
-10
RETURN LOSS (dB)
RETURN LOSS (dB)
Input Return Loss
Vctl1 = 0V, Vctl2 = Variable
-20
-30
-40
-20
-30
-40
10
15
20
25
30
35
40
10
15
20
FREQUENCY (GHz)
-2.4 V
-1.2V
-2.4 V
0.0 V
30
35
40
-1.2V
0.0 V
Output Return Loss
Vctl1 = 0V, Vctl2 = Variable
0
-10
-10
RETURN LOSS (dB)
0
-20
-30
-40
-20
-30
-40
10
15
20
25
30
35
40
10
15
20
FREQUENCY (GHz)
-2.4 V
25
30
35
40
FREQUENCY (GHz)
-1.2V
0.0 V
-2.4 V
Input IP3 vs. Input Power @ 20 GHz
Vctl1 = Variable, Vctl2 = -3V
60
45
50
41
40
37
30
20
-1.2V
0.0 V
Input IP3 vs. Input Power Over Frequency
Vctl1 = -2V, Vctl2 = -3V [1]
IP3 (dBm)
IP3 (dBm)
25
FREQUENCY (GHz)
Output Return Loss
Vctl1 = Variable, Vctl2 = -3V
RETURN LOSS (dB)
attenuators - analog - SMT
Input Return Loss
Vctl1 = Variable, Vctl2 = -3V
33
29
10
25
-5
-1
3
7
11
15
SINGLE TONE INPUT POWER (dBm)
-2.4V
-2.0V
-1.6V
-1.2V
-0.8V
-0.4V
-5
-3
-1
1
3
5
7
9
11
13
15
SINGLE TONE INPUT POWER (dBm)
0.0V
10 GHz
20 GHz
30 GHz
[1] Worst Case IP3
3
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
For price, 2delivery,
and to
placeChelmsford,
orders: Analog MA
Devices,
Inc.,
For price,
delivery
and
to place
orders:
Microwave
Corporation,
Elizabeth
Drive,
01824
responsibility
is assumed
by Analog
Devices
for its use,
nor for anyHittite
infringements
of patents or other
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106
rights of third parties that may result from its use. Specifications subject to change without notice. No
Phone: 978-250-3343
Fax: 978-250-3373 Phone:
Order781-329-4700
On-line at www.hittite.com
• Order online at www.analog.com
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Application
Support: Phone: 1-800-ANALOG-D
Trademarks and registered trademarks are
the property of their
respective owners.
Application
Support:
Phone: 978-250-3343
or apps@hittite.com
HMC985LP4KE
v01.0813
Gaas mmic voltage - variable
attenuator, 10 - 40 GHz
45
60
41
50
37
40
33
29
30
20
25
10
-5
-3
-1
1
3
5
7
9
11
13
15
0
SINGLE TONE INPUT POWER (dBm)
+25 C
+85 C
6
9
12
15
SINGLE TONE INPUT POWER (dBm)
-2.4V
-2.0V
-1.6V
-40 C
Input IP3 vs. Input Power Over Frequency
Vctl2 = -2V, Vctl1 = 0V [1]
45
45
41
41
37
37
33
29
-1.2V
-0.8V
-0.4V
0.0 V
Input IP3 vs Input Power over Temperature @ 20 GHz, Vctl2 = -2V, Vctl1 = 0V [1]
IP3 (dBm)
IP3 (dBm)
3
33
29
25
attenuators - analog - SMT
Input IP3 vs. Input Power @ 20 GHz
Vctl2 = Variable, Vctl1 = 0V
IP3 (dBm)
IP3 (dBm)
Input IP3 vs. Input Power Over Temperature
@ 20 GHz, Vctl1 = -2V, Vctl2 = -3V [1]
25
0
3
6
9
12
15
SINGLE TONE INPUT POWER (dBm)
10 GHz
20 GHz
0
3
6
9
12
15
SINGLE TONE INPUT POWER (dBm)
30 GHz
+25 C
+85 C
-40 C
[1] Worst Case IP3
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
For price, 2delivery,
and to
placeChelmsford,
orders: Analog MA
Devices,
Inc.,
For price,
delivery
and
to place
orders:
Microwave
Corporation,
Elizabeth
Drive,
01824
responsibility
is assumed
by Analog
Devices
for its use,
nor for anyHittite
infringements
of patents or other
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106
rights of third parties that may result from its use. Specifications subject to change without notice. No
Phone: 978-250-3343
Fax: 978-250-3373 Phone:
Order781-329-4700
On-line at www.hittite.com
• Order online at www.analog.com
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Application
Support: Phone: 1-800-ANALOG-D
Trademarks and registered trademarks are
the property of their
respective owners.
Application
Support:
Phone: 978-250-3343
or apps@hittite.com
4
HMC985LP4KE
v01.0813
Gaas mmic voltage - variable
attenuator, 10 - 40 GHz
Attenuation vs Frequency Over Vctrl
Vctl1 = Vctl2
Attenuation vs. Vctrl Over Temperature
@ 20 GHz, Vctl1 = Vctl2
0
-5
-10
ATTENUATION (dB)
ATTENUATION (dB)
-10
-20
-30
-40
-15
-20
-25
-30
-35
-50
-40
-45
-2.4
-60
5
10
15
20
25
30
35
40
-2
-1.6
-1.2
-2.4 V
-2.0 V
-1.6 V
-0.8
-0.4
0
Vctrl1 (V)
FREQUENCY (GHz)
-1.2 V
-0.8 V
-0.4 V
0.0 V
+25 C
Attenuation vs. Pin @ 20 GHz Over Vctl
Vctl1 = Vctl2
+85 C
-40 C
Input Return Loss, Vctl1 = Vctl2
0
0
RETURN LOSS (dB)
-10
ATTENUATION (dB)
attenuators - analog - SMT
0
-20
-30
-40
-50
-10
-20
-30
-40
-5
-1
3
7
11
15
10
15
20
INPUT POWER (dBm)
-2.4V
-2.0V
-1.6V
-1.2V
-0.8V
-0.4V
0.0V
30
35
40
-2.4 V
-1.2V
0.0 V
Input IP3 vs. Input Power Over
Vctrl @ 20 GHz, Vctl1 = Vctl2
Output Return Loss, Vctl1 = Vctl2
0
60
50
-10
IP3 (dBm)
RETURN LOSS (dB)
25
FREQUENCY (GHz)
-20
40
30
-30
20
-40
10
10
15
20
25
30
35
40
FREQUENCY (GHz)
-2.4 V
5
-1.2V
0
3
6
9
12
15
SINGLE TONE INPUT POWER (dBm)
0.0 V
-2.4V
-2.0V
-1.6V
-1.2V
-0.8V
-0.4V
0.0V
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
For price, 2delivery,
and to
placeChelmsford,
orders: Analog MA
Devices,
Inc.,
For price,
delivery
and
to place
orders:
Microwave
Corporation,
Elizabeth
Drive,
01824
responsibility
is assumed
by Analog
Devices
for its use,
nor for anyHittite
infringements
of patents or other
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106
rights of third parties that may result from its use. Specifications subject to change without notice. No
Phone: 978-250-3343
Fax: 978-250-3373 Phone:
Order781-329-4700
On-line at www.hittite.com
• Order online at www.analog.com
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Application
Support: Phone: 1-800-ANALOG-D
Trademarks and registered trademarks are
the property of their
respective owners.
Application
Support:
Phone: 978-250-3343
or apps@hittite.com
HMC985LP4KE
v01.0813
Gaas mmic voltage - variable
attenuator, 10 - 40 GHz
40
40
36
36
32
32
28
24
28
24
20
20
-5
-1
3
7
11
15
SINGLE TONE INPUT POWER (dBm)
10 GHz
20 GHz
-5
-1
3
7
11
15
SINGLE TONE INPUT POWER (dBm)
30 GHz
+25 C
+85 C
-40 C
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
For price, 2delivery,
and to
placeChelmsford,
orders: Analog MA
Devices,
Inc.,
For price,
delivery
and
to place
orders:
Microwave
Corporation,
Elizabeth
Drive,
01824
responsibility
is assumed
by Analog
Devices
for its use,
nor for anyHittite
infringements
of patents or other
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106
rights of third parties that may result from its use. Specifications subject to change without notice. No
Phone: 978-250-3343
Fax: 978-250-3373 Phone:
Order781-329-4700
On-line at www.hittite.com
• Order online at www.analog.com
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Application
Support: Phone: 1-800-ANALOG-D
Trademarks and registered trademarks are
the property of their
respective owners.
Application
Support:
Phone: 978-250-3343
or apps@hittite.com
attenuators - analog - SMT
Input IP3 vs. Input Power Over
Temperature @ 20 GHz Vctl1 = Vctl2
IP3 (dBm)
IP3 (dBm)
Input IP3 vs. Input Power Over Frequency
Vctl1 = Vctl2
6
HMC985LP4KE
v01.0813
Gaas mmic voltage - variable
attenuator, 10 - 40 GHz
attenuators - analog - SMT
Absolute Maximum Ratings
Control Voltage
+1 to -5V
Input RF Power
30 dBm
Maximum Junction Temperature
165 °C
Thermal Resistance (RTH)
(junction to ground paddle)
62 °C/W
Operating Temperature
-40°C to +85°C
ELECTROSTATIC SENSITIVE DEVICE
OBSERVE HANDLING PRECAUTIONS
Storage Temperature
-65°C to 125°C
ESD Sensitivity (HBM)
Class1A, passed 250V
Outline Drawing
NOTES:
1. PACKAGE BODY MATERIAL: LOW STRESS INJECTION MOLDED PLASTIC SILICA AND
SILICON IMPREGNATED.
2. LEAD AND GROUND PADDLE MATERIAL: COPPER ALLOY.
3. LEAD AND GROUND PADDLE PLATING: 100% MATTE TIN
4. DIMENSIONS ARE IN INCHES [MILLIMETERS].
5. LEAD SPACING TOLERANCE IS NON-CUMULATIVE.
6. CHARACTERS TO BE HELVETICA MEDIUM, .025 HIGH, WHITE INK, OR LASER MARK
LOCATED APPROX. AS SHOWN.
7. PAD BURR LENGTH SHALL BE 0.15mm MAX. PAD BURR HEIGHT SHALL BE 0.05mm MAX.
8. PACKAGE WARP SHALL NOT EXCEED 0.05mm
9. ALL GROUND LEADS AND GROUND PADDLE MUST BE SOLDERED TO PCB RF GROUND.
10. REFER TO HITTITE APPLICATION NOTE FOR SUGGESTED PCB LAND PATTERN.
Package Information
Part Number
Package Body Material
Lead Finish
HMC985LP4KE
RoHS-compliant Low Stress Injection Molded Plastic
100% matte Sn
MSL Rating
MSL1
[1]
Package Marking
H985
XXX
[1] Max peak reflow temperature of 260 °C
[2] 4-Digit lot number XXXX
7
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
For price, 2delivery,
and to
placeChelmsford,
orders: Analog MA
Devices,
Inc.,
For price,
delivery
and
to place
orders:
Microwave
Corporation,
Elizabeth
Drive,
01824
responsibility
is assumed
by Analog
Devices
for its use,
nor for anyHittite
infringements
of patents or other
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106
rights of third parties that may result from its use. Specifications subject to change without notice. No
Phone: 978-250-3343
Fax: 978-250-3373 Phone:
Order781-329-4700
On-line at www.hittite.com
• Order online at www.analog.com
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Application
Support: Phone: 1-800-ANALOG-D
Trademarks and registered trademarks are
the property of their
respective owners.
Application
Support:
Phone: 978-250-3343
or apps@hittite.com
HMC985LP4KE
v01.0813
Gaas mmic voltage - variable
attenuator, 10 - 40 GHz
Pin Descriptions
Function
Description
1, 2, 4-7, 12-15,
17-19, 24
GND
These pins and package bottom must be
connected to RF/DC ground externally.
3
RFIN
This pad is DC coupled and matched to 50 Ohms.
8
Vctl1
Control Voltage 1.
9, 11, 20-23
NC
These pins are not connected internally, however all
data shown herein was measured with these pins
connected to RF/DC ground externally.
10
Vctl2
Control Voltage 2.
16
RFOUT
This pad is DC coupled and matched to 50 Ohms.
Pin Schematic
attenuators - analog - SMT
Pin Number
Application Circuit
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
For price, 2delivery,
and to
placeChelmsford,
orders: Analog MA
Devices,
Inc.,
For price,
delivery
and
to place
orders:
Microwave
Corporation,
Elizabeth
Drive,
01824
responsibility
is assumed
by Analog
Devices
for its use,
nor for anyHittite
infringements
of patents or other
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106
rights of third parties that may result from its use. Specifications subject to change without notice. No
Phone: 978-250-3343
Fax: 978-250-3373 Phone:
Order781-329-4700
On-line at www.hittite.com
• Order online at www.analog.com
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Application
Support: Phone: 1-800-ANALOG-D
Trademarks and registered trademarks are
the property of their
respective owners.
Application
Support:
Phone: 978-250-3343
or apps@hittite.com
8
HMC985LP4KE
v01.0813
Gaas mmic voltage - variable
attenuator, 10 - 40 GHz
attenuators - analog - SMT
Evaluation PCB
List of Materials for Evaluation PCB EVAL01-HMC985LP4KE [1]
Item
Description
J1-J2, J6-J7
K Connectors.
J3-J5
DC Pins.
C1-C2
100pF Capacitors, 0402 Pkg.
C3-C4
0.01 µF Capacitor, 0603 Pkg.
C5-C6
4.7 µF Case A, Tantalum.
U1
HMC985LP4KE VVA.
PCB
600-00220-00 Evaluation PCB.
[1] Reference this number when ordering complete evaluation PCB
9
The circuit board used in the final application should
use RF circuit design techniques. Signal lines
should have 50 Ohm impedance while the package
ground leads and exposed paddle should be connected directly to the ground plane similar to that
shown. A sufficient number of via holes should be
used to connect the top and bottom ground planes.
The evaluation circuit board shown is available from
Hittite upon request.
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
For price, 2delivery,
and to
placeChelmsford,
orders: Analog MA
Devices,
Inc.,
For price,
delivery
and
to place
orders:
Microwave
Corporation,
Elizabeth
Drive,
01824
responsibility
is assumed
by Analog
Devices
for its use,
nor for anyHittite
infringements
of patents or other
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106
rights of third parties that may result from its use. Specifications subject to change without notice. No
Phone: 978-250-3343
Fax: 978-250-3373 Phone:
Order781-329-4700
On-line at www.hittite.com
• Order online at www.analog.com
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Application
Support: Phone: 1-800-ANALOG-D
Trademarks and registered trademarks are
the property of their
respective owners.
Application
Support:
Phone: 978-250-3343
or apps@hittite.com
HMC985LP4KE
v01.0813
Gaas mmic voltage - variable
attenuator, 10 - 40 GHz
attenuators - analog - SMT
Notes:
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
For price, 2delivery,
and to
placeChelmsford,
orders: Analog MA
Devices,
Inc.,
For price,
delivery
and
to place
orders:
Microwave
Corporation,
Elizabeth
Drive,
01824
responsibility
is assumed
by Analog
Devices
for its use,
nor for anyHittite
infringements
of patents or other
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106
rights of third parties that may result from its use. Specifications subject to change without notice. No
Phone: 978-250-3343
Fax: 978-250-3373 Phone:
Order781-329-4700
On-line at www.hittite.com
• Order online at www.analog.com
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Application
Support: Phone: 1-800-ANALOG-D
Trademarks and registered trademarks are
the property of their
respective owners.
Application
Support:
Phone: 978-250-3343
or apps@hittite.com
10
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