ATTENUATORS - SMT
5
5 - 138
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
HMC468LP3 / 468LP3E
1 dB LSB GaAs MMIC 3-BIT DIGITAL
POSITIVE CONTROL ATTENUATOR, DC - 6 GHz
v03.1107
Functional Diagram
Electrical Speci cations, TA = +25° C, With Vdd = +5V & Vctl = 0/+5V
The HMC468LP3 / HMC468LP3E is ideal for:
• Cellular; UMTS/3G Infrastructure
• Fixed Wireless & WLL
• Microwave Radio & VSAT
• Test Equipment
1 dB LSB Steps to 7 dB
High IP3: +50 dBm
± 0.25 dB Typical Bit Error
Single Control Line Per Bit
Single +5V Supply
16 Lead 3x3mm SMT Package: 9mm2
Included in the HMC-DK004 Designer’s Kit
The HMC468LP3 & HMC468LP3E are broadband
3-bit GaAs IC digital attenuators in low cost leadless
surface mount packages. Covering DC to 6.0 GHz,
the insertion loss is less than 1 dB typical up to 4
GHz. The attenuator bit values are 1 (LSB), 2 and 4
dB for a total attenuation of 7 dB. Attenuation accu-
racy is excellent at ±0.4 dB typical step error with an
IIP3 of +50 dBm. Three control voltage inputs, toggled
between 0 and +5V, are used to select each attenua-
tion state. A single Vdd bias of +5V is required.
Parameter Frequency (GHz) Min. Typ. Max. Units
Insertion Loss
DC - 2.5 GHz
2.5 - 4.5 GHz
4.5 - 6.0 GHz
0.7
0.9
1.3
1.0
1.3
1.8
dB
dB
dB
Attenuation Range DC - 6 GHz 7 dB
Return Loss (RF1 & RF2, All Atten. States) DC - 4 GHz
4.0 - 6.0 GHz
20
15
dB
dB
Attenuation Accuracy:
(Referenced to Insertion Loss)
All States
1 - 4 dB States
5 - 7 dB States
DC - 2.5 GHz
2.5 - 6.0 GHz
2.5 - 6.0 GHz
± 0.2 + 2% of Atten. Setting Max.
± 0.3 + 3% of Atten. Setting Max.
± 0.4 + 4% of Atten. Setting Max.
dB
dB
dB
Input Power for 0.1 dB Compression 0.25 - 6.0 GHz 20 dBm
Input Third Order Intercept Point
(Two-Tone Input Power= 0 dBm Each Tone) 0.25 - 6.0 GHz 50 dBm
Switching Characteristics
tRISE, tFALL (10/90% RF)
tON, tOFF (50% CTL to 10/90% RF)
DC - 6 GHz
110
135
ns
ns
* Bypass capacitor connecting ACG1, ACG2 & ACG3 to RF ground required per pin description herein.
Typical Applications Features
General Description
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other
rights of third parties that may result from its use. Specifications subject to change without notice. No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarks and registered trademarks are the property of their respective owners.
For price, delivery, and to place orders: Analog Devices, Inc.,
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106
Phone: 781-329-4700 • Order online at www.analog.com
Application Support: Phone: 1-800-ANALOG-D
OBSOLETE
ATTENUATORS - SMT
5
5 - 139
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
Return Loss RF1, RF2
(Only Major States are Shown)
Insertion Loss
Normalized Attenuation
(Only Major States are Shown)
Bit Error vs. Frequency
(Only Major States are Shown)
Relative Phase vs. Frequency
(Only Major States are Shown)
Bit Error vs. Attenuation State
-3
-2.5
-2
-1.5
-1
-0.5
0
0123456
+25 C
+85 C
-40 C
INSERTION LOSS (dB)
FREQUENCY (GHz)
-35
-30
-25
-20
-15
-10
-5
0
0123456
IL
1 dB
2 dB
4 dB
7 dB
RETURN LOSS (dB)
FREQUENCY (GHz)
-10
-8
-6
-4
-2
0
0123456
1 dB
2 dB
4 dB
7 dB
NORMALIZED ATTENUATION (dB)
FREQUENCY (GHz)
-1
-0.6
-0.2
0.2
0.6
1
1234567
80 MHz
500 MHz
1 GHz
2 GHz
3 GHz
4 GHz
5 GHz
6 GHz
BIT ERROR (dB)
ATTENUATION STATE (dB)
-1
-0.6
-0.2
0.2
0.6
1
0123456
1 dB
2 dB
4 dB
7 dB
BIT ERROR (dB)
FREQUENCY (GHz)
-10
-5
0
5
10
15
20
0123456
1 dB
2 dB
4 dB
7 dB
RELATIVE PHASE (deg)
FREQUENCY (GHz)
HMC468LP3 / 468LP3E
v03.1107
1 dB LSB GaAs MMIC 3-BIT DIGITAL
POSITIVE CONTROL ATTENUATOR, DC - 6 GHz
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other
rights of third parties that may result from its use. Specifications subject to change without notice. No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarks and registered trademarks are the property of their respective owners.
For price, delivery, and to place orders: Analog Devices, Inc.,
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106
Phone: 781-329-4700 • Order online at www.analog.com
Application Support: Phone: 1-800-ANALOG-D
OBSOLETE
ATTENUATORS - SMT
5
5 - 140
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
Truth Table
TTL/CMOS Control Voltages
State Bias Condition
Low 0 to 0.8 Vdc @ -5 uA Typ.
High +2.0 to +5.0 Vdc @ 40 uA Typ.
Control Voltage Input
Attenuation Setting
RF1 - RF2
V1
4 dB
V2
2 dB
V3
1 dB
High High High Reference I.L.
High High Low 1 dB
High Low High 2 dB
Low High High 4 dB
Low Low Low 7 dB
Any combination of the above states will provide an attenuation
approximately equal to the sum of the bits selected.
Worst Case Step Error
Between Successive Attenuation States
-1
-0.6
-0.2
0.2
0.6
1
0123456
STEP ERROR (dB)
FREQUENCY (GHz) Bias Voltage & Current
Vdd Range= +5.0 Vdc ± 10%
Vdd
(Vdc)
Idd (Typ.)
(mA)
Idd (Max.)
(mA)
+5.0 1.05 1.8
HMC468LP3 / 468LP3E
v03.1107
1 dB LSB GaAs MMIC 3-BIT DIGITAL
POSITIVE CONTROL ATTENUATOR, DC - 6 GHz
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other
rights of third parties that may result from its use. Specifications subject to change without notice. No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarks and registered trademarks are the property of their respective owners.
For price, delivery, and to place orders: Analog Devices, Inc.,
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106
Phone: 781-329-4700 • Order online at www.analog.com
Application Support: Phone: 1-800-ANALOG-D
OBSOLETE
ATTENUATORS - SMT
5
5 - 141
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
Absolute Maximum Ratings
Outline Drawing
Control Voltage (V1 to V3) -0.5 Vdc to Vdd +1 Vdc
Bias Voltage (Vdd) +7 Vdc
Storage Temperature -65 to +150 °C
Operating Temperature -40 to +85 °C
RF Input Power +30 dBm
ESD Sensitivity (HBM) Class 1A
ELECTROSTATIC SENSITIVE DEVICE
OBSERVE HANDLING PRECAUTIONS
Part Number Package Body Material Lead Finish MSL Rating Package Marking [3]
HMC468LP3 Low Stress Injection Molded Plastic Sn/Pb Solder MSL1 [1] 468
XXXX
HMC468LP3E RoHS-compliant Low Stress Injection Molded Plastic 100% matte Sn MSL1 [2] 468
XXXX
[1] Max peak re ow temperature of 235 °C
[2] Max peak re ow temperature of 260 °C
[3] 4-Digit lot number XXXX
Package Information
NOTES:
1. LEADFRAME MATERIAL: COPPER ALLOY
2. DIMENSIONS ARE IN INCHES [MILLIMETERS]
3. LEAD SPACING TOLERANCE IS NON-CUMULATIVE
4. PAD BURR LENGTH SHALL BE 0.15mm MAXIMUM.
PAD BURR HEIGHT SHALL BE 0.05mm MAXIMUM.
5. PACKAGE WARP SHALL NOT EXCEED 0.05mm.
6. ALL GROUND LEADS AND GROUND PADDLE MUST BE
SOLDERED TO PCB RF GROUND.
7. REFER TO HITTITE APPLICATION NOTE FOR SUGGESTED
LAND PATTERN.
HMC468LP3 / 468LP3E
v03.1107
1 dB LSB GaAs MMIC 3-BIT DIGITAL
POSITIVE CONTROL ATTENUATOR, DC - 6 GHz
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other
rights of third parties that may result from its use. Specifications subject to change without notice. No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarks and registered trademarks are the property of their respective owners.
For price, delivery, and to place orders: Analog Devices, Inc.,
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106
Phone: 781-329-4700 • Order online at www.analog.com
Application Support: Phone: 1-800-ANALOG-D
OBSOLETE
ATTENUATORS - SMT
5
5 - 142
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
Pin Descriptions
Pin Number Function Description Interface Schematic
1, 3, 4, 8,
9, 10, 12 N/C These pins should be connected to PCB
RF ground to maximize performance.
2, 11 RF1, RF2 This pin is DC coupled and matched to 50 Ohm.
Blocking capacitors are required
13 - 15 V1 - V3 See truth table and control voltage table.
5 - 7 ACG1 - ACG3
External capacitor to ground is required.
Select value for lowest frequency of operation.
Place capacitor as close to pins as possible.
16 Vdd Supply Voltage
GND Package bottom has an exposed metal paddle
that must be connected to RF/DC ground.
Application Circuit
HMC468LP3 / 468LP3E
v03.1107
1 dB LSB GaAs MMIC 3-BIT DIGITAL
POSITIVE CONTROL ATTENUATOR, DC - 6 GHz
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other
rights of third parties that may result from its use. Specifications subject to change without notice. No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarks and registered trademarks are the property of their respective owners.
For price, delivery, and to place orders: Analog Devices, Inc.,
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106
Phone: 781-329-4700 • Order online at www.analog.com
Application Support: Phone: 1-800-ANALOG-D
OBSOLETE
ATTENUATORS - SMT
5
5 - 143
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
Evaluation PCB
The circuit board used in the nal application should
use RF circuit design techniques. Signal lines
should have 50 ohm impedance while the package
ground leads and exposed paddle should be con-
nected 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.
List of Materials for Evaluation PCB 107302 [1]
Item Description
J1 - J2 PCB Mount SMA Connector
J3 - J7 DC Pin
C1 1000 pF Capacitor, 0603 Pkg.
C2, C3 100 pF Capacitor, 0402 Pkg.
C4 3300 pF Capacitor, 0603 Pkg.
U1 HMC468LP3 / HMC468LP3E
Digital Attenuator
PCB [2] 107300 Evaluation PCB
[1] Reference this number when ordering complete evaluation PCB
[2] Circuit Board Material: Rogers 4350
HMC468LP3 / 468LP3E
v03.1107
1 dB LSB GaAs MMIC 3-BIT DIGITAL
POSITIVE CONTROL ATTENUATOR, DC - 6 GHz
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other
rights of third parties that may result from its use. Specifications subject to change without notice. No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarks and registered trademarks are the property of their respective owners.
For price, delivery, and to place orders: Analog Devices, Inc.,
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106
Phone: 781-329-4700 • Order online at www.analog.com
Application Support: Phone: 1-800-ANALOG-D
OBSOLETE
