HMC425A
v01.0317
ATTENUATORS - SMT
0.5 dB LSB GaAs MMIC 6-BIT DIGITAL
POSITIVE CONTROL ATTENUATOR, 2.2 - 8.0 GHz
Typical Applications
Features
The HMC425ALP3E is ideal for:
0.5 dB LSB Steps to 31.5 dB
• WLAN & Point-to-Multi-Point
Single Control Line Per Bit
• Fiber Optics & Broadband Telecom
± 0.5 dB Typical Bit Error
• Microwave Radio & VSAT
Single +5V Supply
• Military
3x3 mm SMT Package
Functional Diagram
General Description
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.
Electrical Specifications
TA = +25° C, With VDD = +5V & VCTL= 0/+5V (Unless Otherwise Noted)
Parameter
Typ.
Max.
Units
Insertion Loss
2.2 - 6.0 GHz
6.0 - 8.0 GHz
Frequency
Min.
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
REF - 16.0 dB States
16.5 - 31.5 dB States
2.2 - 8.0 GHz
45
40
dBm
dBm
400
420
ns
ns
Input Third Order Intercept Point
(Two-Tone Input Power= 0 dBm Each Tone)
Switching Characteristics
tRISE, tFALL (10/90% RF)
tON, tOFF (50% CTL to 10/90% RF)
1
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.
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
HMC425A
v01.0317
0.5 dB LSB GaAs MMIC 6-BIT DIGITAL
POSITIVE CONTROL ATTENUATOR, 2.2 - 8.0 GHz
Return Loss RF1, RF2
0
-2
-5
-4
-6
-8
-10
-15
-20
-10
-25
1
2
3
4
5
6
7
8
9
10
1
2
3
4
FREQUENCY (GHz)
+25 C
+85 C
-40 C
6
0.5 dB
1 dB
2 dB
Normalized Attenuation
7
8
9
10
4 dB
8 dB
16 dB
31.5 dB
Bit Error vs. Attenuation State
(Only Major States are Shown)
0
2
-5
1
-10
BIT ERROR (dB)
NORMALIZED ATTENUATION (dB)
5
FREQUENCY (GHz)
-15
-20
-25
0
ATTENUATORS - ANALOG - SMT
(Only Major States are Shown)
0
RETURN LOSS (dB)
INSERTION LOSS (dB)
Insertion Loss
-1
-30
-35
-2
1
2
3
4
5
6
7
8
9
10
0
4
8
FREQUENCY (GHz)
0.5 dB
1 dB
2 dB
4 dB
8 dB
16 dB
31.5 dB
Bit Error vs. Frequency
16
20
24
28
32
2.4 GHz
5.5 GHz
3.5 GHz
8 GHz
Relative Phase vs. Frequency
(Only Major States are Shown)
(Only Major States are Shown)
2
80
1.5
60
1
40
RELATIVE PHASE (Deg)
BIT ERROR (dB)
12
ATTENUATION STATE (dB)
0.5
0
-0.5
-1
20
0
-20
-40
0.5 dB
1 dB
2 dB
-1.5
4 dB
8 dB
16 dB
31.5 dB
0.5 dB
1 dB
2 dB
-60
-2
4 dB
8 dB
16 dB
31.5 dB
-80
1
2
3
4
5
6
FREQUENCY (GHz)
7
8
9
10
1
2
3
4
5
6
7
8
9
10
FREQUENCY (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
2
HMC425A
v01.0317
0.5 dB LSB GaAs MMIC 6-BIT DIGITAL
POSITIVE CONTROL ATTENUATOR, 2.2 - 8.0 GHz
Worst Case Step Error
Between Successive Attenuation States
P0.1dB vs. Temprature, IL State
40
5V
35
0.8
0.4
P0.1dB (dBm)
STEP ERROR (dB)
30
0
-0.4
25
20
3V
15
10
5
-0.8
0
-1.2
2
1
2
3
4
5
6
7
8
9
3
8 dB
4
10
5
+25 C
16 dB
7
8
+85 C
-40 C
24 dB
IIP3 vs. Frequency at VDD=3V
IIP3 vs. Frequency at VDD=5V
60
55
55
50
50
45
45
IIP3 (dBm)
60
40
35
40
35
30
30
IL
0.5 dB
1 dB
25
2 dB
4 dB
8 dB
16 dB
31.5 dB
IL
0.5 dB
1 dB
25
20
2 dB
4 dB
8 dB
16 dB
31.5 dB
20
2
3
4
5
6
7
8
2
3
4
FREQUENCY (GHz)
5
6
7
8
FREQUENCY (GHz)
Truth Table
Bias Voltage & Current
Control Voltage Input
VDD Range = +3.0 V to +5.0 V
Attenuation
State
RF1 - RF2
VDD (Vdc)
+3.0 V
10 μA
High
Reference
I.L.
+5.0 V
30 μA
High
Low
0.5 dB
High
Low
High
1 dB
Low
High
High
2 dB
Low
High
High
High
4 dB
Low
High
High
High
High
8 dB
State
Bias Condition
Low
High
High
High
High
High
16 dB
Low
0 to 0.2V at 10 μA Typ.
Low
Low
Low
Low
Low
Low
31.5 dB
High
VDD ± 0.2V at 5 μA Typ.
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
High
High
High
High
High
High
High
High
High
High
High
High
Any combination of the above states will provide an attenuation
approximately equal to the sum of the bits selected.
3
6
FREQUENCY (GHz)
FREQUENCY (GHz)
IIP3 (dBm)
ATTENUATORS - ANALOG - SMT
1.2
IDD (Typ.)
Control Voltage
Note: VDD = +3V to +5V
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
HMC425A
v01.0317
0.5 dB LSB GaAs MMIC 6-BIT DIGITAL
POSITIVE CONTROL ATTENUATOR, 2.2 - 8.0 GHz
Control Voltage (V1 to V6)
VDD +0.5 Vdc
Supply Voltage (VDD)
+7.0 Vdc
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
ATTENUATORS - ANALOG - SMT
Absolute Maximum Ratings
ELECTROSTATIC SENSITIVE DEVICE
OBSERVE HANDLING PRECAUTIONS
Outline Drawing
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
DETAIL A
3.10
3.00 SQ
2.90
PIN 1
INDICATOR
(JEDEC 95)
0.30
0.25
0.20
0.50
BSC
13
PIN 1
INDICATOR AREA OPTIONS
16
1
12
(SEE DETAIL A)
1.70
1.60 SQ
1.50
EXPOSED
PAD
9
TOP VIEW
0.90
0.85
0.80
4
5
8
0.20 MIN
BOTTOM VIEW
11-22-2016-A
0.05 MAX
0.02 NOM
COPLANARITY
0.08
0.203 REF
SEATING
PLANE
PKG-004831
0.45
0.40
0.35
COMPLIANT TO JEDEC STANDARDS MO-220-VEED-4
Package Information
Part Number
Package Body Material
Lead Finish
HMC425ALP3E
RoHS-compliant Low Stress Injection Molded Plastic
100% Matte Sn
MSL Rating
MSL3
[1]
Package Marking [2]
H425A
XXXX
[1] Max peak reflow temperature of 260 °C
[2] 4-Digit lot number XXXX
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
4
HMC425A
v01.0317
0.5 dB LSB GaAs MMIC 6-BIT DIGITAL
POSITIVE CONTROL ATTENUATOR, 2.2 - 8.0 GHz
ATTENUATORS - ANALOG - SMT
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
TP1
VDD
TP8
C6
TP2
V6
R1
100
C12
100PF
5
TP3
V5
TP4
V4
GND
RFOUT
HMC425ALP3E
GND
V3
8 V2
100PF
U1
V1
C2
12
11
RFOUT
10
J2
100PF
9
R6
7
J1
1
GND
2
RFIN
3
GND
4
V6
5 V5
6 V4
C1
RFIN
NC 16
15
VDD
NC 14
NC 13
100PF
C7
V1
100
TP7
100PF
R2
R5
100
100
R3
R4
100
100
V2
TP6
V3
TP5
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
HMC425A
v01.0317
0.5 dB LSB GaAs MMIC 6-BIT DIGITAL
POSITIVE CONTROL ATTENUATOR, 2.2 - 8.0 GHz
* R1 - R6 = 100 Ohm.
These resistors are optional and may be
used to enhance decoupling of the RF path
from the control inputs.
ATTENUATORS - ANALOG - SMT
Evaluation PCB Layout
List of Materials for Evaluation PCB EV1HMC425ALP3E [1]
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
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.
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
6
