ATTENUATORS - SMT
1
HMC425A
v01.0317
0.5 dB LSB GaAs MMIC 6-BIT DIGITAL
POSITIVE CONTROL ATTENUATOR, 2.2 - 8.0 GHz
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
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. Specications 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.
Functional Diagram
Electrical Specications
TA = +25° C, With VDD = +5V & VCTL= 0/+5V (Unless Otherwise Noted)
The HMC425ALP3E is ideal for:
• WLAN & Point-to-Multi-Point
• Fiber Optics & Broadband Telecom
• Microwave Radio & VSAT
• Military
0.5 dB LSB Steps to 31.5 dB
Single Control Line Per Bit
± 0.5 dB Typical Bit Error
Single +5V Supply
3x3 mm SMT Package
HMC425ALP3E are broadband 6-bit GaAs IC
digital attenuators in low cost leadless surface
mount packages. Covering 2.2 GHz to 8.0 GHz,
the insertion loss is less than 4.5 dB typical. The
attenuator bit values are 0.5 (LSB), 1, 2, 4, 8, and
16 dB for a total attenuation of 31.5 dB. Attenuation
accuracy is excellent at ± 0.5 dB typical step error
with an IIP3 of +40 dBm. Six control voltage inputs,
toggled between 0 and +3 to +5V, are used to select
each attenuation state. A single VDD bias of +3 to
+5V is required.
Parameter Frequency Min. Typ. Max. Units
Insertion Loss 2.2 - 6.0 GHz
6.0 - 8.0 GHz
3.5
4.5
4
4.7
dB
dB
Attenuation Range 2.2 - 8.0 GHz 31.5 dB
Return Loss (RF1 & RF2, All Atten. States) 2.2 - 8.0 GHz 15 dB
Attenuation Accuracy
(Referenced to Insertion Loss) All States 2.2 - 8.0 GHz ± (0.5 + 5% of Atten. Setting Max.) dB
Input Power for 0.1 dB Compression VDD= 5V
VDD = 3V 2.2 - 8.0 GHz 25
23
dBm
dBm
Input Third Order Intercept Point
(Two-Tone Input Power= 0 dBm Each Tone)
REF - 16.0 dB States
16.5 - 31.5 dB States 2.2 - 8.0 GHz 45
40
dBm
dBm
Switching Characteristics
tRISE, tFALL (10/90% RF)
tON, tOFF (50% CTL to 10/90% RF)
2.2 - 8.0 GHz 400
420
ns
ns
Typical Applications Features
General Description
ATTENUATORS - ANALOG - SMT
2
v01.0317
0.5 dB LSB GaAs MMIC 6-BIT DIGITAL
POSITIVE CONTROL ATTENUATOR, 2.2 - 8.0 GHz
HMC425A
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
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
-10
-8
-6
-4
-2
0
12345678910
+25 C +85 C -40 C
INSERTION LOSS (dB)
FREQUENCY (GHz)
-25
-20
-15
-10
-5
0
12345678910
0.5 dB
1 dB
2 dB
4 dB
8 dB
16 dB
31.5 dB
RETURN LOSS (dB)
FREQUENCY (GHz)
-35
-30
-25
-20
-15
-10
-5
0
12345678910
0.5 dB
1 dB
2 dB
4 dB
8 dB
16 dB
31.5 dB
NORMALIZED ATTENUATION (dB)
FREQUENCY (GHz)
-2
-1
0
1
2
0 4 8 12 16 20 24 28 32
2.4 GHz
3.5 GHz
5.5 GHz
8 GHz
BIT ERROR (dB)
ATTENUATION STATE (dB)
-2
-1.5
-1
-0.5
0
0.5
1
1.5
2
12345678910
0.5 dB
1 dB
2 dB
4 dB
8 dB
16 dB
31.5 dB
BIT ERROR (dB)
FREQUENCY (GHz)
-80
-60
-40
-20
0
20
40
60
80
12345678910
0.5 dB
1 dB
2 dB
4 dB
8 dB
16 dB
31.5 dB
RELATIVE PHASE (Deg)
FREQUENCY (GHz)
ATTENUATORS - ANALOG - SMT
3
v01.0317
0.5 dB LSB GaAs MMIC 6-BIT DIGITAL
POSITIVE CONTROL ATTENUATOR, 2.2 - 8.0 GHz
HMC425A
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
Truth Table
Control Voltage
Bias Voltage & Current
Worst Case Step Error
Between Successive Attenuation States
VDD Range = +3.0 V to +5.0 V
VDD (Vdc) IDD (Typ.)
+3.0 V 10 μA
+5.0 V 30 μA
State Bias Condition
Low 0 to 0.2V at 10 μA Typ.
High VDD ± 0.2V at 5 μA Typ.
Note: VDD = +3V to +5V
Control Voltage Input Attenuation
State
RF1 - RF2
V1
16 dB
V2
8 dB
V3
4 dB
V4
2 dB
V5
1 dB
V6
0.5 dB
High High High High High High Reference
I.L.
High High High High High Low 0.5 dB
High High High High Low High 1 dB
High High High Low High High 2 dB
High High Low High High High 4 dB
High Low High High High High 8 dB
Low High High High High High 16 dB
Low Low Low Low Low Low 31.5 dB
Any combination of the above states will provide an attenuation
approximately equal to the sum of the bits selected.
-1.2
-0.8
-0.4
0
0.4
0.8
1.2
12345678910
8 dB 16 dB 24 dB
STEP ERROR (dB)
FREQUENCY (GHz)
IIP3 vs. Frequency at VDD=5V
20
25
30
35
40
45
50
55
60
2345678
IL
0.5 dB
1 dB
2 dB
4 dB
8 dB
16 dB
31.5 dB
IIP3 (dBm)
FREQUENCY (GHz)
P0.1dB vs. Temprature, IL State
0
5
10
15
20
25
30
35
40
2345678
+25 C +85 C -40 C
P0.1dB (dBm)
FREQUENCY (GHz)
5V5V
3V
IIP3 vs. Frequency at VDD=3V
20
25
30
35
40
45
50
55
60
2345678
IL
0.5 dB
1 dB
2 dB
4 dB
8 dB
16 dB
31.5 dB
IIP3 (dBm)
FREQUENCY (GHz)
ATTENUATORS - ANALOG - SMT
4
v01.0317
0.5 dB LSB GaAs MMIC 6-BIT DIGITAL
POSITIVE CONTROL ATTENUATOR, 2.2 - 8.0 GHz
HMC425A
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
Absolute Maximum Ratings
Outline Drawing
Control Voltage (V1 to V6) VDD +0.5 Vdc
Supply Voltage (VDD) +7.0 Vd c
Storage Temperature -65 to +150 °C
Operating Temperature -40 to +85 °C
RF Input Power (2.2 - 8.0 GHz) +27 dBm
ESD Sensitivity (HBM) Class 1A
ESD Sensitivity (FICDM) Class IV
3.10
3.00 SQ
2.90
0.30
0.25
0.20
1.70
1.60 SQ
1.50
16-Lead Lead Frame Chip Scale Package [LFCSP
3 x 3 mm Body and 0.85 mm Package Height
(CP-16-50)
Dimensions shown in millimeters
1
0.50
BSC
BOTTOM VIEWTOP VIEW
16
5
8
9
12
13
4
0.05 MAX
0.02 NOM
0.203 REF
0.20 MIN
COPLANARITY
0.08
PIN 1
INDICATOR
0.90
0.85
0.80
0.45
0.40
0.35
11-22-2016-A
PKG-004831
COMPLIANT TO JEDEC STANDARDS MO-220-VEED-4
EXPOSED
PAD
PIN 1
INDICATOR AREA OPTIONS
(SEE DETAIL A)
DETAIL A
(JEDEC 95)
SEATING
PLANE
ELECTROSTATIC SENSITIVE DEVICE
OBSERVE HANDLING PRECAUTIONS
Part Number Package Body Material Lead Finish MSL Rating Package Marking [2]
HMC425ALP3E RoHS-compliant Low Stress Injection Molded Plastic 100% Matte Sn MSL3 [1] H425A
XXXX
[1] Max peak reow temperature of 260 °C
[2] 4-Digit lot number XXXX
Package Information
ATTENUATORS - ANALOG - SMT
5
v01.0317
0.5 dB LSB GaAs MMIC 6-BIT DIGITAL
POSITIVE CONTROL ATTENUATOR, 2.2 - 8.0 GHz
HMC425A
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
Pin Descriptions
Pin Number Function Description Interface Schematic
1, 3, 10, 12 GND Package bottom has an exposed metal paddle
that must also be connected to RF ground.
2, 11 RFIN, RFOUT This pin is DC coupled and matched to 50 Ohm.
Blocking capacitors are required.
4, 5, 6, 7, 8, 9 V1 - V6 See truth table and control voltage table.
13, 14, 16 NC This pin should be connected to PCB RF ground to
maximize performance.
15 VDD Supply Voltage
Evaluation PCB Schematic
U1
9
10
11
12
13
14
15
16
8
7
6
5
4
3
2
1
RFIN
V6
V5
V4
V3
V2
VDD
RFOUT
V1
GND GND
GNDGND
NC
NC
NC
TP1
100PF
C1
J1
100PF
C2
J2
RFIN RFOUT
R1
100
TP2 V6
100
R2
TP3 V5
R3
100
TP4 V4
R5
100
TP6
V2
100
R4
TP5
V3
TP8
R6
100
TP7
V1
VDD
100PF
C7C12
100PF
C6
100PF
HMC425ALP3E
ATTENUATORS - ANALOG - SMT
6
v01.0317
0.5 dB LSB GaAs MMIC 6-BIT DIGITAL
POSITIVE CONTROL ATTENUATOR, 2.2 - 8.0 GHz
HMC425A
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
Evaluation PCB Layout
The circuit board used in the 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
Analog Devices upon request.
* R1 - R6 = 100 Ohm.
These resistors are optional and may be
used to enhance decoupling of the RF path
from the control inputs.
Item Description
J1 - J2 PCB Mount SMA Connector
TP1-TP8 DC Test Point
C1-C2, C6, C7, C12 100 pF Capacitor, 0402 Pkg.
R1 - R6 100 Ohm Resistor, 0402 Pkg.
U1 HMC425ALP3E Digital Attenuator
PCB [2] 08-044925 Evaluation PCB
[1] Reference this number when ordering complete evaluation PCB
[2] Circuit Board Material: Rogers 4350
List of Materials for Evaluation PCB EV1HMC425ALP3E [1]
