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HMC541LP3 / 541LP3E
v01.1005
10 dB GaAs MMIC 1-BIT DIGITAL
POSITIVE CONTROL ATTENUATOR, DC - 5 GHz
Typical Applications
Features
The HMC541LP3 / HMC541LP3E is ideal for both RF
and IF applications:
± 0.2 dB Typical Step Error
• Cellular Infrastructure
High IP3: +50 dBm
• ISM, MMDS, WLAN, WiMAX, WiBro
Single Control Line
• Microwave Radio & VSAT
TTL/CMOS Compatible Control
• Test Equipment and Sensors
Single +5V Supply
Low Insertion Loss: 1 dB
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ATTENUATORS - SMT
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3x3 mm SMT Package
Functional Diagram
General Description
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The HMC541LP3 & HMC541LP3E are broadband
1-bit GaAs IC digital attenuators in low cost leadless surface mount packages. This single positive control line digital attenuator utilizes off chip
AC ground capacitors for near DC operation,
making it suitable for a wide variety of RF and IF
applications. Covering DC to 5 GHz, the insertion
loss is less than 1 dB typical. Attenuation accuracy
is excellent at ± 0.2 dB typical step error. The attenuator also features a high IIP3 of +50 dBm. One TTL/
CMOS control input is used to select the attenuation
state. A single Vdd bias of +5V is required.
Electrical Specifi cations,
TA = +25° C, With Vdd = +5V & Vctl = 0/+5V (Unless Otherwise Noted)
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Parameter
Insertion Loss
Attenuation Range
Return Loss (RF1 & RF2, All Atten. States)
Attenuation Accuracy: (Referenced to Insertion Loss)
Frequency (GHz)
DC - 2.0 GHz
2.0 - 3.5 GHz
3.5 - 5.0 GHz
Min.
Typ.
Max.
Units
0.5
1.0
2.0
0.8
1.3
2.3
dB
dB
dB
DC - 5 GHz
10
dB
DC - 2.5 GHz
2.5 - 5.0 GHz
25
15
dB
dB
DC - 5 GHz
± 0.4 Max.
dB
Input Power for 0.1 dB Compression
0.1 - 5.0 GHz
27
dBm
Input Third Order Intercept Point
(Two-Tone Input Power= 0 dBm Each Tone)
0.1 - 5.0 GHz
50
dBm
20
23
ns
ns
Switching Characteristics
DC - 5 GHz
tRISE, tFALL (10/90% RF)
tON, tOFF (50% CTL to 10/90% RF)
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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
HMC541LP3 / 541LP3E
v01.1005
10 dB GaAs MMIC 1-BIT DIGITAL
POSITIVE CONTROL ATTENUATOR, DC - 5 GHz
-1
-10
-3
-4
-30
-40
0
1
2
3
4
5
6
0
1
3
4
5
6
5
6
5
6
FREQUENCY (GHz)
Normalized Attenuation
Relative Phase vs. Frequency
0
40
30
-2
-6
-8
-10
0
1
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-4
-12
2
3
4
5
20
10
0
-10
-20
-30
-40
6
0
1
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Bit Error vs. Frequency
2
3
4
FREQUENCY (GHz)
FREQUENCY (GHz)
Input IP3 vs. Frequency
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50
0.6
40
IP3 (dBm)
BIT ERROR (dB)
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FREQUENCY (GHz)
NORMALIZED ATTENUATION (dB)
10 dB
-20
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+25 C
+85 C
-40 C
-2
I.L.dB
ATTENUATORS - SMT
0
RETURN LOSS (dB)
0
1
5
Return Loss RF1, RF2
RELATIVE PHASE (deg)
INSERTION LOSS (dB)
Insertion Loss
0.2
-0.2
30
I.L. dB
10 dB
20
-0.6
10
-1
0
0
1
2
3
4
FREQUENCY (GHz)
5
6
0
1
2
3
4
FREQUENCY (GHz)
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 - 177
HMC541LP3 / 541LP3E
v01.1005
10 dB GaAs MMIC 1-BIT DIGITAL
POSITIVE CONTROL ATTENUATOR, DC - 5 GHz
Bias Voltage & Current
Truth Table
ATTENUATORS - SMT
Vdd = +5.0 Vdc ± 10%
Vdd
(VDC)
Control Voltage Input
Attenuation State
RF1 - RF2
Idd (Typ.)
(mA)
V1
10 dB
+4.5
1.3
High
Reference I.L.
+5.0
1.5
Low
10 dB
+5.5
1.7
Control Voltage
State
Bias Condition
Low
0 to +0.8V @ -5 uA Typ.
High
+2.0 to + 5.0 Vdc @ 40 uA Typ.
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Note: Vdd = +5V
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5
5 - 178
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
HMC541LP3 / 541LP3E
v01.1005
10 dB GaAs MMIC 1-BIT DIGITAL
POSITIVE CONTROL ATTENUATOR, DC - 5 GHz
RF Input Power (DC - 5 GHz)
+27 dBm (T = +85 °C)
Control Voltage Range (V1)
-1V to Vdd +1V
Bias Voltage (Vdd)
+7.0 Vdc
Channel Temperature
150 °C
Continuous Pdiss (T = 85 °C)
(derate 14.7 mW/°C above 85 °C)
0.96 W
Thermal Resistance
68 °C/W
Storage Temperature
-65 to +150 °C
Operating Temperature
-40 to +85 °C
ESD Sensitivity (HBM)
Class 1B
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Outline Drawing
ELECTROSTATIC SENSITIVE DEVICE
OBSERVE HANDLING PRECAUTIONS
ATTENUATORS - SMT
5
Absolute Maximum Ratings
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.
Package Information
Part Number
Package Body Material
Lead Finish
MSL Rating
HMC541LP3
Low Stress Injection Molded Plastic
Sn/Pb Solder
MSL1
HMC541LP3E
RoHS-compliant Low Stress Injection Molded Plastic
100% matte Sn
MSL1
Package Marking [3]
[1]
541
XXXX
[2]
541
XXXX
[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 - 179
HMC541LP3 / 541LP3E
v01.1005
10 dB GaAs MMIC 1-BIT DIGITAL
POSITIVE CONTROL ATTENUATOR, DC - 5 GHz
5
Function
Description
1
Vdd
Supply Voltage.
2, 11
RF1, RF2
This pin is DC coupled and matched to 50 Ohm.
Blocking capacitors are required.
Select value based on lowest frequency of operation.
3, 4, 6, 7,
9, 10, 12,
13, 15, 16
N/C
These pins should be connected to PCB RF ground to
maximize performance.
5, 8
ACG1, ACG2
External capacitor to ground is required. Select value for
lowest frequency of operation. Place capacitor as close
to pins as possible.
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V1
Interface Schematic
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Pin Number
See truth table and control voltage table.
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ATTENUATORS - SMT
Pin Descriptions
GND
Package bottom has an exposed metal paddle that must be
connected to RF Ground.
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Application Circuit
Recommended Component Values
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C1 - C3
1,000 pF ± 10%
C4, C5
330 pF ± 10%
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
HMC541LP3 / 541LP3E
v01.1005
10 dB GaAs MMIC 1-BIT DIGITAL
POSITIVE CONTROL ATTENUATOR, DC - 5 GHz
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ATTENUATORS - SMT
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Evaluation PCB
List of Material for Evaluation PCB 111317 [1]
Description
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Item
J1 - J2
PCB Mount SMA Connector
J3 - J5
DC Connector
C1 - C3
1000 pF Capacitor, 0402 Pkg.
C4 - C5
330 pF Capacitor, 0402 Pkg.
U1
HMC541LP3 / HMC541LP3E
Digital Attenuator
PCB [2]
111290 Evaluation PCB
[1] Reference this number when ordering complete evaluation PCB
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.
[2] Circuit Board Material: Rogers 4350
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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