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| MICROWAVE CORPORATION v04.0604 HMC424LP3 Features 0.5 dB LSB Steps to 31.5 dB Single Control Line Per Bit +/- 0.5 dB Typical Bit Error 9mm2 Leadless SMT Plastic Package 0.5dB LSB GaAs MMIC 6-BIT DIGITAL ATTENUATOR, DC - 13 GHz Typical Applications The HMC424LP3 is ideal for: 9 ATTENUATORS - SMT * Basestation Infrastructure * Fiber Optics & Broadband Telecom * Microwave & VSAT Radios * Military & Space * Test Instrumentation Functional Diagram General Description The HMC424LP3 is a broadband 6-bit GaAs IC digital attenuator in a low cost leadless surface mount package. Covering DC to 13 GHz, the insertion loss is less then 4 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 +32 dBm. Six control voltage inputs, toggled between 0 and -5V, are used to select each attenuation state. A single Vee bias of -5V allows operation at frequencies down to DC. Electrical Specifications, TA = +25 C, With Vee = -5V & VCTL= 0/-5V Parameter Frequency (GHz) DC - 4.0 GHz 4.0 - 8.0 GHz 8.0 - 13.0 GHz DC - 13.0 GHz DC - 13.0 GHz 0.5 - 15.5 dB States 16 - 31.5 dB States 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) REF State All Other States DC - 13.0 GHz DC - 13.0 GHz 1.0 - 13.0 Ghz 1.0 - 13.0 Ghz DC - 13.0 GHz 30 50 ns ns 9 Min. Typ. 3.1 3.5 4.0 31.5 12 Max. 3.8 4.0 4.6 Units dB dB dB dB dB dB dB dBm dBm dBm Insertion Loss Attenuation Range Return Loss (RF1 & RF2, All Atten. States) Attenuation Accuracy: (Referenced to Insertion Loss) 0.3 + 3% of Atten. Setting Max 0.3 + 5% of Atten. Setting Max 22 46 32 9 - 92 For price, delivery, and to place orders, please contact Hittite Microwave Corporation: 12 Elizabeth Drive, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373 Order Online at www.hittite.com MICROWAVE CORPORATION v04.0604 HMC424LP3 0.5dB LSB GaAs MMIC 6-BIT DIGITAL ATTENUATOR, DC - 13 GHz GaAs MMIC Insertion Loss 0 -1 -2 INSERTION LOSS (dB) -3 -4 -5 -6 -7 -8 -9 -10 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 FREQUENCY (GHz) -25 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 FREQUENCY (GHz) +25 C +85 C -40 C SUB-HARMONICALLY (Only Major States are Shown) - 25 GHz PUMPED MIXER 17 0 0.5 dB 1 dB 2 dB 4 dB 8 dB 16 dB 31.5 dB Return Loss RF1, RF2 -5 RETURN LOSS (dB) 9 ATTENUATORS - SMT 9 - 93 -10 -15 -20 Normalized Attenuation (Only Major States are Shown) 0 NORMALIZED ATTENUATION (dB) -5 -10 BIT ERROR (dB) -15 -20 -25 -30 -35 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 FREQUENCY (GHz) 0.5 dB 1 dB 2 dB 4 dB 8 dB 16 dB 31.5 dB Bit Error vs. Attenuation State 2 1.5 1 0.5 0 -0.5 -1 -1.5 -2 0 4 8 12 16 20 24 28 32 ATTENUATION STATE (dB) 0.1 GHz 4 GHz 8 GHz 13 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 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 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) 100 80 RELATIVE PHASE (deg) 60 40 20 0 -20 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 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: 12 Elizabeth Drive, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373 Order Online at www.hittite.com MICROWAVE CORPORATION v04.0604 HMC424LP3 0.5dB LSB GaAs MMIC 6-BIT DIGITAL ATTENUATOR, DC - 13 GHz Worst Case Step Error Between Successive Attenuation States 2 Bias Voltage & Current Vee Range= -5.0 Vdc 10% Vee (VDC) -5.0 Iee (Typ.) (mA) 2 Iee (Max.) (mA) 4 9 STEP ERROR (dB) 1.5 1 0.5 0 -0.5 -1 -1.5 ATTENUATORS - SMT Control Voltage State Low Bias Condition 0 to -3V @ 70 A Typ. -5 to -4.2V @ 5 A Typ. -2 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 High FREQUENCY (GHz) Truth Table Control Voltage Input V1 16 dB Low Low Low Low Low Low High High V2 8 dB Low Low Low Low Low High Low High V3 4 dB Low Low Low Low High Low Low High V4 2 dB Low Low Low High Low Low Low High V5 1 dB Low Low High Low Low Low Low High V6 0.5 dB Low High Low Low Low Low Low High Attenuation 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. 9 - 94 For price, delivery, and to place orders, please contact Hittite Microwave Corporation: 12 Elizabeth Drive, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373 Order Online at www.hittite.com MICROWAVE CORPORATION v04.0604 HMC424LP3 0.5dB LSB GaAs MMIC 6-BIT DIGITAL ATTENUATOR, DC - 13 GHz Absolute Maximum Ratings Control Voltage (V1 to V6) Bias Voltage (Vee) Channel Temperature Thermal Resistance Storage Temperature Operating Temperature RF Input Power (0.5 - 13.0 GHz) Vee - 0.5 Vdc -7.0 Vdc 150 C 140 C/W 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. REFER TO HITTITE APPLICATION NOTE SUGGESTED PCB LAND PATTERN. -65 to + 150 C -55 to +85 C +25 dBm Outline Drawing For price, delivery, and to place orders, please contact Hittite Microwave Corporation: 12 Elizabeth Drive, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373 Order Online at www.hittite.com 9 - 95 MICROWAVE CORPORATION v04.0604 HMC424LP3 0.5dB LSB GaAs MMIC 6-BIT DIGITAL ATTENUATOR, DC - 13 GHz Pin Description Pad Number Function Description Interface Schematic 9 ATTENUATORS - SMT 1, 3, 10, 12 GND Package bottom has an exposed metal paddle that must also be connected to RF grount 2, 11 RFIN, RFOUT This pin is DC coupled and matched to 50 Ohm. Blocking capacitors are required if RF line potential is not equal to 0V. 4, 5, 6, 7, 8, 9 V6 - V1 See truth table and control voltage table. 13, 14, 16 N/C This pin should be connected to PCB RF ground to maximize performance 15 VEE Supply Voltage -5V 10% Suggested Driver Circuit (One Circuit Required Per Bit Control Input) Simple driver using inexpensive standard logic ICs provides fast switching using minimum DC current. * Recommended value to suppress unwanted RF signals at V1 V6 control lines. 9 - 96 For price, delivery, and to place orders, please contact Hittite Microwave Corporation: 12 Elizabeth Drive, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373 Order Online at www.hittite.com MICROWAVE CORPORATION v04.0604 HMC424LP3 0.5dB LSB GaAs MMIC 6-BIT DIGITAL ATTENUATOR, DC - 13 GHz Evaluation PCB 9 ATTENUATORS - SMT 9 - 97 * R1 - R6 = 100 Ohm. These resistors are optional and may be used to enhance decoupling of the RF path from the control inputs. 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. List of Material Item J1 - J2 J3 C1 R1 - R6 U1 PCB* Description PC Mount SMA Connector 8 Pin DC Connector 0.01 F Capacitor, 0603 Pkg. 100 Ohm Resistor, 0603 Pkg. HMC424LP3 Digital Attenuator 105245 Evaluation PCB * Circuit Board Material: Rogers 4350 For price, delivery, and to place orders, please contact Hittite Microwave Corporation: 12 Elizabeth Drive, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373 Order Online at www.hittite.com |
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