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| v00.0604 HMC472LP4 0.5 dB LSB GaAs MMIC 6-BIT DIGITAL POSITIVE CONTROL ATTENUATOR, DC - 3.0 GHz Typical Applications Features 0.5 dB LSB Steps to 31.5 dB Single Control Line Per Bit TTL/CMOS Compatible Control +/- 0.5 dB Typical Step Error Single +5V Supply 4 mm x 4 mm x 1 mm SMT Package 9 ATTENUATORS - SMT The HMC472LP4 is ideal for both RF and IF applications: * Cellular; UMTS/3G Infrastructure * ISM, MMDS, WLAN, WiMAX * Microwave Radio & VSAT * Test Equipment & Sensors Functional Diagram General Description The HMC472LP4 is a broadband 6-bit GaAs IC digital attenuator in a low cost leadless surface mount package. 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 3.0 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 0.5 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) Input Power for 0.1 dB Compression Input Third Order Intercept Point (Two-Tone Input Power= 0 dBm Each Tone) Switching Characteristics DC - 3.0 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 REF - 15.5 dB 16.0 - 31.5 dB Frequency (GHz) DC - 1.5 GHz 1.5 - 3.0 GHz DC - 3.0 GHz DC - 3.0 GHz DC - 3.0 GHz 0.1 - 3.0 GHz 0.1 - 3.0 GHz Min. Typ. 1.5 2.0 31.5 15 (0.4 + 4% of Atten. Setting) Max. (0.5 + 4% of Atten. Setting) Max. 20 45 35 Max. 1.8 2.3 Units dB dB dB dB dB dB dBm dBm dBm 9 - 144 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 v00.0604 HMC472LP4 0.5 dB LSB GaAs MMIC 6-BIT DIGITAL POSITIVE CONTROL ATTENUATOR, DC - 3.0 GHz GaAs MMIC Insertion Loss 0 -0.5 INSERTION LOSS (dB) +25 C SUB-HARMONICALLY (Only Major States are Shown) - 25 GHz PUMPED MIXER 17 0 -5 RETURN LOSS (dB) +85 C Return Loss RF1, RF2 9 0.5-16 dB -15 -20 -25 31.5 dB -1.5 -2 -2.5 -3 0 0.5 1 1.5 2 2.5 3 3.5 4 FREQUENCY (GHz) -30 -35 0 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 BIT ERROR (dB) -10 -15 -20 -25 -30 -35 0 0.5 1 1.5 2 2.5 3 3.5 4 FREQUENCY (GHz) Bit Error vs. Attenuation State 1 0.8 0.6 0.4 0.2 0 -0.2 -0.4 -0.6 -0.8 -1 0 4 8 12 16 20 24 28 32 ATTENUATION STATE (dB) 2 GHz 1 GHz 3 GHz 40 MHz 500 MHz 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 31.5 dB Relative Phase vs. Frequency (Only Major States are Shown) 100 80 RELATIVE PHASE (deg) 60 40 31.5 dB 20 0 -20 16 dB 8 dB -1.5 -2 0 0.5 1 1.5 2 2.5 3 16 dB 0.5-4 dB -40 3.5 4 0 0.5 1 1.5 2 2.5 3 3.5 4 FREQUENCY (GHz) 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 9 - 145 ATTENUATORS - SMT -1 -10 -40 C v00.0604 HMC472LP4 0.5 dB LSB GaAs MMIC 6-BIT DIGITAL POSITIVE CONTROL ATTENUATOR, DC - 3.0 GHz Worst Case Step Error Between Successive Attenuation States 9 STEP ERROR (dB) 1 0.8 0.6 0.4 0.2 0 -0.2 -0.4 -0.6 -0.8 -1 0 0.5 1 1.5 2 2.5 3 3.5 4 FREQUENCY (GHz) ATTENUATORS - SMT Bias Voltage & Current Vdd = +5.0 Vdc 10% Vdd (VDC) +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 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 Low Low Any combination of the above states will provide an attenuation approximately equal to the sum of the bits selected. 9 - 146 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 v00.0604 HMC472LP4 0.5 dB LSB GaAs MMIC 6-BIT DIGITAL POSITIVE CONTROL ATTENUATOR, DC - 3.0 GHz Absolute Maximum Ratings RF Input Power (DC - 3.0 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 +7.0 Vdc 9 ATTENUATORS - SMT NOTES: 1. MATERIAL PACKAGE BODY: LOW STRESS INJECTION MOLDED PLASTIC SILICA AND SILICON IMPREGNATED. 2. LEAD AND GROUND PADDLE MATERIAL: COPPER ALLOY 3. LEAD AND GROUND PADDLE PLATING: Sn/Pb SOLDER 4. DIMENSIONS ARE IN INCHES [MILLIMETERS]. 5. LEAD SPACING TOLERANCE IS NON-CUMULATIVE 6. PAD BURR LENGTH SHALL BE 0.15mm MAXIMUM. PAD BURR HEIGHT SHALL BE 0.05mm MAXIMUM. 7. PACKAGE WARP SHALL NOT EXCEED 0.05mm. 8. ALL GROUND LEADS AND GROUND PADDLE MUST BE SOLDERED TO PCB RF GROUND. 9. CLASSIFIED AS MOISTURE SENSITIVITY LEVEL (MSL) 1. 150 C 0.5 W 130 C/W -65 to +150 C -40 to +85 C ELECTROSTATIC SENSITIVE DEVICE OBSERVE HANDLING PRECAUTIONS Outline Drawing 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 9 - 147 v00.0604 HMC472LP4 0.5 dB LSB GaAs MMIC 6-BIT DIGITAL POSITIVE CONTROL ATTENUATOR, DC - 3.0 GHz Pin Descriptions 9 ATTENUATORS - SMT Pin Number 1, 3, 5, 12, 14, 16, 17, 18 2 Function N/C Description These pins should be connected to PCB RF ground to maximize performance. Supply Voltage. Interface Schematic Vdd 4, 15 RF1, RF2 This pin is DC coupled and matched to 50 Ohm. Blocking capacitors are required. Select value based on lowest frequency of operation. 6 - 11, 13 ACG1 - ACG7 External capacitor to ground is required. Select value for lowest frequency of operation. Place capacitor as close to pins as possible. 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. Application Circuit 9 - 148 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 v00.0604 HMC472LP4 0.5 dB LSB GaAs MMIC 6-BIT DIGITAL POSITIVE CONTROL ATTENUATOR, DC - 3.0 GHz Evaluation PCB 9 ATTENUATORS - SMT List of Material for Evaluation PCB 107010 [1] Item J1 - J2 J3 C1 C2, C3 C4 - C7 U1 PCB [2] Description PC Mount SMA Connector 14 Pin DC Connector 1000 pF Capacitor, 0603 Pkg. 1000 pF Capacitor, 0402 Pkg. 330 pF Capacitor, 0402 Pkg. HMC472LP4 Digital Attenuator 106977 Evaluation PCB [1] Reference this number when ordering complete evaluation PCB [2] Circuit Board Material: Rogers 4350 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. 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 9 - 149 |
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