HMC472LP4 / 472LP4E
0.5 dB LSB GaAs MMIC 6-BIT DIGITAL POSITIVE CONTROL ATTENUATOR, DC - 3.8 GHz
v06.1108
5
ATTENUATORS - DIGITAL - SMT
Typical Applications
The HMC472LP4(E) is ideal for: • 3G Infrastructure & access points • Cellular/3G, LTE & UMB • WiMAX, WiBN & Fixed Wireless • Test Equipment and Sensors • GSM, WCDMA & TD-SCDMA
Features
0.5 dB LSB Steps to 31.5 dB Single Control Line Per Bit TTL/CMOS Compatible Control ± 0.25 dB Typical Step Error Single +5V Supply 24 Lead Ceramic 4x4mm SMT Package: 16mm2 Included in the HMC-DK004 Designer’s Kit
Functional Diagram
General Description
The HMC472LP4 & HMC472LP4E are broadband 6-bit GaAs IC digital attenuators in low cost leadless surface mount packages. This single positive control line per bit digital attenuator incorporates off chip AC ground capacitors for near DC operation, making it suitable for a wide variety of RF and IF applications. Covering DC to 3.8 GHz, the insertion loss is less than 2.0 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 ± 0.25 dB typical step error with an IIP3 of +45 dBm. Six TTL/ CMOS control inputs are used to select each 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)
Parameter Insertion Loss Attenuation Range Return Loss (RF1 & RF2, All Atten. States) Attenuation Accuracy: (Referenced to Insertion Loss) All Attenuation States 0.5 - 3.5 dB States 4.0 - 31.5 dB States All Attenuation States All Attenuation States Input Power for 0.1 dB Compression Input Third Order Intercept Point (Two-Tone Input Power= 0 dBm Each Tone) Switching Characteristics DC - 3.8 GHz tRISE, tFALL (10/90% RF) tON, tOFF (50% CTL to 10/90% RF) 130 140 ns ns REF - 15.5 dB States 16.0 - 31.5 dB States Frequency (GHz) DC - 1.5 GHz 1.5 - 3.0 GHz 3.0 - 3.8 GHz DC - 3.8 GHz DC - 3.8 GHz Min. Typ. 1.5 2.0 2.3 31.5 15 Max. 1.8 2.3 3 Units dB dB dB dB dB
DC - 1.0 GHz 1.0 - 2.2 GHz 1.0 - 2.2 GHz 2.2 - 3.0 GHz 3.0 - 3.8 GHz 0.1 - 3.8 GHz 0.1 - 3.8 GHz
± (0..20 + 3% of Atten. Setting) Max. ± (0.25 + 3% of Atten. Setting) Max. ± (0.15 + 4% of Atten. Setting) Max. ± (0.30 + 3% of Atten. Setting) Max ± (0.35 + 5% of Atten. Setting) Max. 20 45 35
dB dB dB dB dB dBm dBm dBm
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F or 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
HMC472LP4 / 472LP4E
v06.1108
0.5 dB LSB GaAs MMIC 6-BIT DIGITAL POSITIVE CONTROL ATTENUATOR, DC - 3.8 GHz
Insertion Loss
0 -0.5 INSERTION LOSS (dB) -1 -1.5 -2 -2.5 -3 0 0.05 0.1 0.15 0.2 0.25 0.3 0.35 FREQUENCY (GHz)
+25C +85C -40C
Insertion Loss
0 -0.5 INSERTION LOSS (dB) -1 -1.5 -2 -2.5 -3 0.05
+25 C +85 C -40 C
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ATTENUATORS - DIGITAL - SMT
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0.5
1
1.5
2
2.5
3
3.5
4
FREQUENCY (GHz)
Return Loss RF1, RF2
(Only Major States are Shown)
0 -5 RETURN LOSS (dB) -10 -15 -20 -25 -30 -35 0 0.05 0.1 0.15 0.2 0.25 0.3 0.35 FREQUENCY (GHz)
Return Loss RF1, RF2
(Only Major States are Shown)
0 -5 RETURN LOSS (dB) -10 -15 -20 -25
31.5 dB
0.5-16 dB
-30 -35 0.05
0.5
1
1.5
2
2.5
3
3.5
4
FREQUENCY (GHz)
Normalized Attenuation
(Only Major States are Shown)
0 NORMALIZED ATTENUATION (dB) -5 -10 -15 -20 -25 -30 -35 0 0.05 0.1 0.15 0.2 0.25 0.3 0.35 FREQUENCY (GHz)
Normalized Attenuation
(Only Major States are Shown)
0 NORMALIZED ATTENUATION (dB) -5 -10 -15 -20 -25 -30 -35 0.05
0.5
1
1.5
2
2.5
3
3.5
4
FREQUENCY (GHz)
F or 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
HMC472LP4 / 472LP4E
v06.1108
0.5 dB LSB GaAs MMIC 6-BIT DIGITAL POSITIVE CONTROL ATTENUATOR, DC - 3.8 GHz
5
ATTENUATORS - DIGITAL - SMT
Bit Error vs. Attenuation State
0 -0.1 -0.2 BIT ERROR (dB)
100 MHz 50 MHz
Bit Error vs. Attenuation State
2 1.5 1 BIT ERROR (dB) 0.5 0 -0.5 -1
3 GHz 3.8 GHz
-0.3 -0.4 -0.5 -0.6 -0.7 -0.8
200MHz, 300MHz, 350MHz
1 GHz
-0.9 -1 0 4 8 12 16 20 24 28 32
-1.5
100MHz, 2GHz
40MHz, 500 MHz
-2 0
4
8
12
16
20
24
28
32
ATTENUATION STATE (dB)
ATTENUATION STATE (dB)
Bit Error vs. Frequency
(Only Major States are Shown)
2 1.5 1 BIT ERROR (dB) 0.5 0 -0.5 -1
8 dB 0.5-4 dB
Bit Error vs. Frequency
(Only Major States are Shown)
2
1 BIT ERROR (dB)
0.5-4 dB
0
-1
16 dB 31.5 dB 8 dB 31.5 dB 16 dB
-1.5 -2 0 0.05 0.1 0.15 0.2 0.25
0.3
0.35
-2 0.05
0.5
1
1.5
2
2.5
3
3.5
4
FREQUENCY (GHz)
FREQUENCY (GHz)
Bit Error vs. Frequency without AC Ground Caps
(Only Major States are Shown)
3 2.5 2 1.5 BIT ERROR (dB) 1 0.5 0 -0.5 -1 -1.5 -2 -2.5 -3 0 0.5 1 1.5 2 2.5 3 3.5 4 FREQUENCY (GHz)
0.5 - 8 dB 16 dB 31.5 dB
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F or 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
HMC472LP4 / 472LP4E
v06.1108
0.5 dB LSB GaAs MMIC 6-BIT DIGITAL POSITIVE CONTROL ATTENUATOR, DC - 3.8 GHz
Relative Phase vs. Frequency
(Only Major States are Shown)
100 80 RELATIVE PHASE (deg) 0.6 60 40
31.5 dB
Worst Case Step Error Between Successive Attenuation States
1
5
ATTENUATORS - DIGITAL - SMT
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STEP ERROR (dB) 3.5 4
0.2
20 0 -20
16 dB 8 dB
-0.2
-0.6
0.5-4 dB
-40 0 0.5 1 1.5 2 2.5 3 FREQUENCY (GHz)
-1 0 0.5 1 1.5 2 2.5 3 3.5 4 FREQUENCY (GHz)
Bias Voltage & Current
Vdd = +5V ± 10% Vdd (V) +4.5 +5.0 +5.5 Idd (Typ.) (mA) 4.7 5.0 5.3
Truth Table
Control Voltage Input V1 16 dB High High High High 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 Attenuation State RF1 - RF2 Reference I.L. 0.5 dB 1 dB 2 dB 4 dB 8 dB 16 dB 31.5 dB
Control Voltage
State Low High Note: Vdd = +5V Bias Condition 0 to +0.8 Vdc @ -5 uA Typ. + 2.0 to + 5.0 Vdc @ 40 uA Typ.
High High Low Low
Any combination of the above states will provide an attenuation approximately equal to the sum of the bits selected.
F or 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
HMC472LP4 / 472LP4E
v06.1108
0.5 dB LSB GaAs MMIC 6-BIT DIGITAL POSITIVE CONTROL ATTENUATOR, DC - 3.8 GHz
5
ATTENUATORS - DIGITAL - SMT
Absolute Maximum Ratings
RF Input Power (DC - 3 GHz) Control Voltage Range (V1 to V6) Bias Voltage (Vdd) Channel Temperature Continuous Pdiss (T = 85 °C) (derate 7.7 mW/°C above 85 °C) Thermal Resistance Storage Temperature Operating Temperature +27 dBm (T = +85 °C) -1V to Vdd +1V +7V 150 °C 0.5 W 130 °C/W -65 to +150 °C -40 to +85 °C
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 HMC472LP4 HMC472LP4E 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] H472 XXXX H472 XXXX
[2]
[1] Max peak reflow temperature of 235 °C [2] Max peak reflow temperature of 260 °C [3] 4-Digit lot number XXXX
5 - 144
F or 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
HMC472LP4 / 472LP4E
v06.1108
0.5 dB LSB GaAs MMIC 6-BIT DIGITAL POSITIVE CONTROL ATTENUATOR, DC - 3.8 GHz
Pin Descriptions
Pin Number 1, 3, 5, 12, 14, 16, 17, 18 2 Function N/C Vdd Description These pins should be connected to PCB RF ground to maximize performance. Supply Voltage. This pin is DC coupled and matched to 50 Ohm. Blocking capacitors are required. Select value based on lowest frequency of operation. External capacitors to ground are recommended for low and high frequency operation. Select value for lowest frequency of operation. Place capacitor as close to pins as possible. For operation from 700 to 2700 MHz, these pins may be left unconnected. Interface Schematic
5
ATTENUATORS - DIGITAL - SMT
5 - 145
4, 15
RF1, RF2
6 - 11, 13
ACG1 - ACG7
19 - 24
V1 - V6
See truth table and control voltage table.
GND
Package bottom has an exposed metal paddle that must also be connected to RF/DC Ground.
F or 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
HMC472LP4 / 472LP4E
v06.1108
0.5 dB LSB GaAs MMIC 6-BIT DIGITAL POSITIVE CONTROL ATTENUATOR, DC - 3.8 GHz
5
ATTENUATORS - DIGITAL - SMT
Application Circuit
Note: For operations from 700 to 2700 MHz, pins 6 through 13 may be left unconnected.
5 - 146
F or 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
HMC472LP4 / 472LP4E
v06.1108
0.5 dB LSB GaAs MMIC 6-BIT DIGITAL POSITIVE CONTROL ATTENUATOR, DC - 3.8 GHz
Evaluation PCB
5
ATTENUATORS - DIGITAL - SMT
List of Materials for Evaluation PCB 107010 [1]
Item J1 - J2 J3 C1 C2, C3 C4 - C7 U1 PCB [2] Description PCB Mount SMA Connector 14 Pin DC Connector 1000 pF Capacitor, 0603 Pkg. 1000 pF Capacitor, 0402 Pkg. 330 pF Capacitor, 0402 Pkg. HMC472LP4 / HMC472LP4E Digital Attenuator 106977 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.
[1] Reference this number when ordering complete evaluation PCB [2] Circuit Board Material: Rogers 4350
F or 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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