HMC425LP3
/
425LP3E
0.5 dB LSB GaAs MMIC 6-BIT DIGITAL
POSITIVE CONTROL ATTENUATOR, 2.2 - 8.0 GHz
v03.0409
5
ATTENUATORS - DIGITAL - SMT
Typical Applications
The HMC425LP3 / HMC425LP3E is ideal for:
• WLAN & Point-to-Multi-Point
• Fiber Optics & Broadband Telecom
• Microwave Radio & VSAT
• Military
Features
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
Functional Diagram
General Description
The HMC425LP3 & HMC425LP3E are broadband
6-bit GaAs IC digital attenuators in low cost leadless
surface mount packages. Covering 2.2 to 8.0 GHz,
the insertion loss is less then 3.8 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 Specifi cations,
T
A
= +25° C, With Vdd = +5V & Vctl = 0/+5V
(Unless Otherwise Noted)
Parameter
Insertion Loss
Attenuation Range
Return Loss (RF1 & RF2, All Atten. States)
Attenuation Accuracy:
(Referenced to Insertion Loss)
Input Power for 0.1 dB Compression
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)
All States
Vdd = 5V
Vdd = 3V
REF - 16.0 dB States
16.5 - 31.5 dB States
Frequency
(GHz)
2.2 - 6.0 GHz
6.0 - 8.0 GHz
2.2 - 8.0 GHz
2.2 - 8.0 GHz
2.2 - 8.0 GHz
2.2 - 8.0 GHz
2.2 - 8.0 GHz
2.2 - 8.0 GHz
160
180
ns
ns
Min.
Typ.
3.5
3.8
31.5
15
± 0.5 + 5% of Atten. Setting Max.
22
19
45
35
Max.
3.8
4.3
Units
dB
dB
dB
dB
dB
dBm
dBm
dBm
dBm
5 - 116
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
HMC425LP3
/
425LP3E
0.5 dB LSB GaAs MMIC 6-BIT DIGITAL
POSITIVE CONTROL ATTENUATOR, 2.2 - 8.0 GHz
Return Loss RF1, RF2
Insertion Loss
0
v03.0409
(Only Major States are Shown)
0
0.5 dB
1 dB
2 dB
4 dB
8 dB
16 dB
31.5 dB
5
ATTENUATORS - DIGITAL - SMT
5 - 117
INSERTION LOSS (dB)
-2
RETURN LOSS (dB)
8
9
10
-5
-4
+25 C
+85 C
-40 C
-10
-6
-15
-8
-20
-10
1
2
3
4
5
6
7
FREQUENCY (GHz)
-25
1
2
3
4
5
6
7
8
9
10
FREQUENCY (GHz)
Normalized Attenuation
(Only Major States are Shown)
0
NORMALIZED ATTENUATION (dB)
-5
-10
-15
-20
-25
-30
-35
1
2
3
4
5
6
7
8
9
10
FREQUENCY (GHz)
-2
0
4
8
12
16
20
24
28
32
ATTENUATION STATE (dB)
1
BIT ERROR (dB)
Bit Error vs. Attenuation State
2
0
0.5 dB
1 dB
2 dB
4 dB
8 dB
16 dB
31.5 dB
-1
2.4 GHz
3.5 GHz
5.5 GHz
8.0 GHz
Bit Error vs. Frequency
(Only Major States are Shown)
2
1.5
1
BIT ERROR (dB)
0.5
0
-0.5
-1
-1.5
-2
1
2
3
4
5
6
7
8
9
10
FREQUENCY (GHz)
0.5 dB
1 dB
2 dB
4 dB
8 dB
16 dB
31.5 dB
Relative Phase vs. Frequency
(Only Major States are Shown)
80
60
RELATIVE PHASE (deg)
40
20
0
-20
-40
1
2
3
4
5
6
7
8
9
10
FREQUENCY (GHz)
0.5 dB
1 dB
2 dB
4 dB
8 dB
16 dB
31.5 dB
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
HMC425LP3
/
425LP3E
0.5 dB LSB GaAs MMIC 6-BIT DIGITAL
POSITIVE CONTROL ATTENUATOR, 2.2 - 8.0 GHz
v03.0409
5
ATTENUATORS - DIGITAL - SMT
Worst Case Step Error
Between Successive Attenuation States
1.2
0.8
STEP ERROR (dB)
0.4
0
-0.4
-0.8
-1.2
1
2
3
4
5
6
7
8
9
10
Bias Voltage & Current
Vdd Range = 3.0 to +5.0 Vdc
Vdd
(VDC)
+3.0
+5.0
Idd (Typ.)
(μA)
10
30
Control Voltage
State
Low
High
Note: Vdd = +3V to +5V
Bias Condition
0 to 0.2V @ 10 uA Typ.
Vdd ± 0.2V @ 5 uA Typ.
FREQUENCY (GHz)
Truth Table
Control Voltage Input
V1
16 dB
High
High
High
High
High
High
Low
Low
V2
8 dB
High
High
High
High
High
Low
High
Low
V3
4 dB
High
High
High
High
Low
High
High
Low
V4
2 dB
High
High
High
Low
High
High
High
Low
V5
1 dB
High
High
Low
High
High
High
High
Low
V6
0.5 dB
High
Low
High
High
High
High
High
Low
Attenua-
tion State
RF1 - RF2
Reference
I.L.
0.5 dB
1 dB
2 dB
4 dB
8 dB
16 dB
31.5 dB
Any combination of the above states will provide an attenuation
approximately equal to the sum of the bits selected.
5 - 118
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
HMC425LP3
/
425LP3E
0.5 dB LSB GaAs MMIC 6-BIT DIGITAL
POSITIVE CONTROL ATTENUATOR, 2.2 - 8.0 GHz
v03.0409
Absolute Maximum Ratings
Control Voltage (V1 to V6)
Bias Voltage (Vdd)
Staorage Temperature
Operating Temperature
RF Input Power (2.4 - 8.0 GHz)
ESD Sensitivity (HBM)
Vdd +0.5 Vdc
+7.0 Vdc
-65 to +150 °C
-40 to +85 °C
+30 dBm
Class 1A
5
ATTENUATORS - DIGITAL - SMT
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.
ELECTROSTATIC SENSITIVE DEVICE
OBSERVE HANDLING PRECAUTIONS
Outline Drawing
Package Information
Part Number
HMC425LP3
HMC425LP3E
Package Body Material
Low Stress Injection Molded Plastic
RoHS-compliant Low Stress Injection Molded Plastic
Lead Finish
Sn/Pb Solder
100% matte Sn
MSL Rating
MSL1
MSL1
[1]
Package Marking
[3]
425
XXXX
425
XXXX
[2]
[1] Max peak reflow temperature of 235 °C
[2] Max peak reflow temperature of 260 °C
[3] 4-Digit lot number XXXX
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
5 - 119
HMC425LP3
/
425LP3E
v03.0409
0.5 dB LSB GaAs MMIC 6-BIT DIGITAL
POSITIVE CONTROL ATTENUATOR, 2.2 - 8.0 GHz
5
ATTENUATORS - DIGITAL - SMT
Pin Descriptions
Pin Number
1, 3, 10, 12
Function
GND
Description
Package bottom has an exposed metal paddle
that must also be connected to RF ground.
This pin is DC coupled and matched to 50 Ohm.
Blocking capacitors are required.
Interface Schematic
2, 11
RFIN, RFOUT
4, 5, 6, 7, 8, 9
V1 - V6
See truth table and control voltage table.
13, 14, 16
15
N/C
Vdd
This pin should be connected to PCB RF ground to
maximize performance.
Supply Voltage.
5 - 120
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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