HMC541LP3
/
541LP3E
v01.1005
10 dB GaAs MMIC 1-BIT DIGITAL
POSITIVE CONTROL ATTENUATOR, DC - 5 GHz
5
ATTENUATORS - SMT
Typical Applications
The HMC541LP3 / HMC541LP3E is ideal for both RF
and IF applications:
• Cellular Infrastructure
• ISM, MMDS, WLAN, WiMAX, WiBro
• Microwave Radio & VSAT
• Test Equipment and Sensors
Features
± 0.2 dB Typical Step Error
Low Insertion Loss: 1 dB
High IP3: +50 dBm
Single Control Line
TTL/CMOS Compatible Control
Single +5V Supply
3x3 mm SMT Package
Functional Diagram
General Description
The HMC541LP3 & HMC541LP3E are broadband
1-bit GaAs IC digital attenuators in low cost lead-
less surface mount packages. This single posi-
tive 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 attenu-
ator 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,
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
DC - 5 GHz
tRISE, tFALL (10/90% RF)
tON, tOFF (50% CTL to 10/90% RF)
20
23
ns
ns
Frequency (GHz)
DC - 2.0 GHz
2.0 - 3.5 GHz
3.5 - 5.0 GHz
DC - 5 GHz
DC - 2.5 GHz
2.5 - 5.0 GHz
DC - 5 GHz
0.1 - 5.0 GHz
0.1 - 5.0 GHz
Min.
Typ.
0.5
1.0
2.0
10
25
15
± 0.4 Max.
27
50
Max.
0.8
1.3
2.3
Units
dB
dB
dB
dB
dB
dB
dB
dBm
dBm
5 - 176
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
Insertion Loss
0
Return Loss RF1, RF2
0
5
I.L.dB
RETURN LOSS (dB)
-1
-10
10 dB
-2
+25 C
+85 C
-40 C
-20
-3
-30
-4
0
1
2
3
4
5
6
FREQUENCY (GHz)
-40
0
1
2
3
4
5
6
FREQUENCY (GHz)
Normalized Attenuation
0
NORMALIZED ATTENUATION (dB)
-2
Relative Phase vs. Frequency
40
30
RELATIVE PHASE (deg)
20
10
0
-10
-20
-30
-40
-4
-6
-8
-10
-12
0
1
2
3
4
5
6
FREQUENCY (GHz)
0
1
2
3
4
5
6
FREQUENCY (GHz)
Bit Error vs. Frequency
1
Input IP3 vs. Frequency
60
50
40
0.6
BIT ERROR (dB)
0.2
IP3 (dBm)
30
20
I.L. dB
10 dB
-0.2
-0.6
10
0
0
1
2
3
4
5
6
0
1
2
3
4
5
6
FREQUENCY (GHz)
FREQUENCY (GHz)
-1
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
ATTENUATORS - SMT
INSERTION LOSS (dB)
HMC541LP3
/
541LP3E
v01.1005
10 dB GaAs MMIC 1-BIT DIGITAL
POSITIVE CONTROL ATTENUATOR, DC - 5 GHz
5
ATTENUATORS - SMT
Bias Voltage & Current
Vdd = +5.0 Vdc ± 10%
Vdd
(VDC)
+4.5
+5.0
+5.5
Idd (Typ.)
(mA)
1.3
1.5
1.7
Truth Table
Control Voltage Input
V1
10 dB
High
Low
Attenuation State
RF1 - RF2
Reference I.L.
10 dB
Control Voltage
State
Low
High
Note: Vdd = +5V
Bias Condition
0 to +0.8V @ -5 uA Typ.
+2.0 to + 5.0 Vdc @ 40 uA Typ.
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
Absolute Maximum Ratings
RF Input Power (DC - 5 GHz)
Control Voltage Range (V1)
Bias Voltage (Vdd)
Channel Temperature
Continuous Pdiss (T = 85 °C)
(derate 14.7 mW/°C above 85 °C)
Thermal Resistance
Storage Temperature
Operating Temperature
ESD Sensitivity (HBM)
+27 dBm (T = +85 °C)
-1V to Vdd +1V
+7.0 Vdc
150 °C
0.96 W
68 °C/W
-65 to +150 °C
-40 to +85 °C
Class 1B
5
ELECTROSTATIC SENSITIVE DEVICE
OBSERVE HANDLING PRECAUTIONS
Outline Drawing
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
HMC541LP3
HMC541LP3E
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]
541
XXXX
541
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 - 179
ATTENUATORS - SMT
HMC541LP3
/
541LP3E
v01.1005
10 dB GaAs MMIC 1-BIT DIGITAL
POSITIVE CONTROL ATTENUATOR, DC - 5 GHz
5
ATTENUATORS - SMT
Pin Descriptions
Pin Number
1
Function
Vdd
Description
Supply Voltage.
This pin is DC coupled and matched to 50 Ohm.
Blocking capacitors are required.
Select value based on lowest frequency of operation.
Interface Schematic
2, 11
RF1, RF2
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.
14
V1
See truth table and control voltage table.
GND
Package bottom has an exposed metal paddle that must be
connected to RF Ground.
Application Circuit
Recommended Component Values
C1 - C3
C4, C5
1,000 pF ± 10%
330 pF ± 10%
5 - 180
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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