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HMC424LP3 424LP3E / v08.0809 0.5dB LSB GaAs MMIC 6-BIT DIGITAL ATTENUATOR, DC - 13 GHz Typical Applications Features The HMC424LP3 / HMC424LP3E is ideal for: 0.5 dB LSB Steps to 31.5 dB t M • Basestation Infrastructure Single Control Line Per Bit s • Fiber Optics & Broadband Telecom ± 0.5 dB Typical Bit Error - • Microwave & VSAT Radios 9mm2 Leadless SMT Plastic Package L A • Military & Space t • Test Instrumentation I G I D Functional Diagram General Description - The HMC424LP3 & HMC424LP3E are broadband s 6-bit GaAs IC digital attenuators in low cost leadless r surface mount packages. Covering DC to 13 GHz, the o insertion loss is less then 4 dB typical. The attenuator t A bit values are 0.5 (LSB), 1, 2, 4, 8, and 16 dB for a u total attenuation of 31.5 dB. Attenuation accuracy is n excellent at ± 0.5 dB typical step error with an IIP3 of e +32 dBm. Six control voltage inputs, toggled between t 0 and -5V, are used to select each attenuation state. t A single Vee bias of -5V allows operation at frequ- A encies down to DC. Electrical Specifications, T = +25° C, With Vee = -5V & VCTL= 0/-5V A Parameter Frequency (GHz) Min. Typ. Max. Units DC - 4 GHz 3.1 3.8 dB Insertion Loss 4.0 - 8.0 GHz 3.5 4.0 dB 8.0 - 13.0 GHz 4.0 4.6 dB Attenuation Range DC - 13.0 GHz 31.5 dB Return Loss (RF1 & RF2, All Atten. States) DC - 13.0 GHz 9 12 dB Attenuation Accuracy: (Referenced to Insertion Loss) 0.5 - 15.5 dB States DC - 13.0 GHz ± (0.3 + 3% of Atten. Setting) Max dB 16 - 31.5 dB States DC - 13.0 GHz ± (0.3 + 5% of Atten. Setting) Max dB Input Power for 0.1 dB Compression 1.0 - 13.0 Ghz 22 dBm Input Third Order Intercept Point REF State 46 dBm 1.0 - 13.0 Ghz (Two-Tone Input Power= 0 dBm Each Tone) All Other States 32 dBm Switching Characteristics DC - 13.0 GHz tRISE, tFALL (10/90% RF) 30 ns tON/tOFF (50% CTL to 10/90% RF) 50 ns For price, delivery and to place orders: Hittite Microwave Corporation, 20 Alpha Road, Chelmsford, MA 01824 1 Phone: 978-250-3343 Fax: 978-250-3373 Order On-line at www.hittite.com Application Support: Phone: 978-250-3343 or apps@hittite.com

HMC424LP3E v08.0809 0.5dB LSB GaAs MMIC 6-BIT DIGITAL ATTENUATOR, DC - 13 GHz Return Loss RF1, RF2 Insertion Loss (Only Major States are Shown) 0 0 t 0.5 dB 8 dB M -2 -5 1 dB 16 dB OSS (dB) -4 SS (dB)-10 24 ddBB 31.5 dB - s L O ON +25 C N L L ERTI -6 +-4805 CC ETUR-15 tA S R IN -8 -20 GI I D -10 -25 0 3 6 9 12 15 0 3 6 9 12 15 - FREQUENCY (GHz) FREQUENCY (GHz) s r Normalized Attenuation o (Only Major States are Shown) Bit Error vs. Attenuation State t A 0 2 u ATION (dB)-1-05 B) 1 01.1348 GGGGHHHHzzzz ten U d TEN-15 OR ( 0 t T R A A-20 R D 0.5 dB 8 dB E E 1 dB 16 dB T ALIZ-25 24 ddBB 31.5 dB BI -1 M OR-30 N -35 -2 0 3 6 9 12 15 0 4 8 12 16 20 24 28 32 FREQUENCY (GHz) ATTENUATION STATE (dB) Bit Error vs. Frequency Relative Phase vs. Frequency (Only Major States are Shown) (Only Major States are Shown) 2 100 0.5 dB 8 dB 0.5 dB 8 dB 80 1 dB 16 dB 1 dB 16 dB 2 dB 31.5 dB 1 2 dB 31.5 dB g) 4 dB 4 dB e dB) E (d 60 R ( AS RO 0 PH 40 R E E V BIT ATI 20 -1 EL R 0 -2 -20 0 3 6 9 12 15 0 3 6 9 12 15 FREQUENCY (GHz) FREQUENCY (GHz) For price, delivery and to place orders: Hittite Microwave Corporation, 20 Alpha Road, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373 Order On-line at www.hittite.com 2 Application Support: Phone: 978-250-3343 or apps@hittite.com

HMC424LP3E v08.0809 0.5dB LSB GaAs MMIC 6-BIT DIGITAL ATTENUATOR, DC - 13 GHz Worst Case Step Error Between Successive Attenuation States Bias Voltage & Current 2 Vee Range= -5 Vdc ± 10% t M Vee Iee (Typ.) Iee (Max.) (VDC) (mA) (mA) 1 s B) -5 2 5 - R (d O L RR 0 A P E Control Voltage t TE I S -1 G State Bias Condition I Low 0 to -3V @ 35 µA Typ. D -2 High Vee to Vee +0.8V @ 5 µA Typ. 0 3 6 9 12 15 - FREQUENCY (GHz) s r o Truth Table t A u Control Voltage Input Attenuation n V1 V2 V3 V4 V5 V6 State 16 dB 8 dB 4 dB 2 dB 1 dB 0.5 dB RF1 - RF2 e Reference t Low Low Low Low Low Low I.L. t Low Low Low Low Low High 0.5 dB A Low Low Low Low High Low 1 dB Low Low Low High Low Low 2 dB Low Low High Low Low Low 4 dB Low High Low Low Low Low 8 dB High Low Low Low Low Low 16 dB High High High High High High 31.5 dB Any Combination of the above states will provide an attenuation approximately equal to the sum of the bits selected. For price, delivery and to place orders: Hittite Microwave Corporation, 20 Alpha Road, Chelmsford, MA 01824 3 Phone: 978-250-3343 Fax: 978-250-3373 Order On-line at www.hittite.com Application Support: Phone: 978-250-3343 or apps@hittite.com

HMC424LP3E v08.0809 0.5dB LSB GaAs MMIC 6-BIT DIGITAL ATTENUATOR, DC - 13 GHz Absolute Maximum Ratings Control Voltage (V1 to V6) Vee - 0.5 Vdc t Bias Voltage (Vee) -7 Vdc M Channel Temperature 150 °C s Thermal Resistance 330 °C/W - Storage Temperature -65 to + 150 °C L Operating Temperature -55 to +85 °C A RF Input Power (0.5 - 13 GHz) +25 dBm t I G ELECTROSTATIC SENSITIVE DEVICE I OBSERVE HANDLING PRECAUTIONS D - Outline Drawing s r o t A u n e t t A 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 Package Marking [3] HMC424LP3 Low Stress Injection Molded Plastic Sn/Pb Solder MSL1 [1] 424 XXXX HMC424LP3E RoHS-compliant Low Stress Injection Molded Plastic 100% matte Sn MSL1 [2] 424 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: Hittite Microwave Corporation, 20 Alpha Road, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373 Order On-line at www.hittite.com 4 Application Support: Phone: 978-250-3343 or apps@hittite.com

HMC424LP3E v08.0809 0.5dB LSB GaAs MMIC 6-BIT DIGITAL ATTENUATOR, DC - 13 GHz Pin Description Pad Number Function Description Interface Schematic t M Package bottom has an exposed metal paddle that 1, 3, 10, 12 GND must also be connected to RF ground s This pin is DC coupled and matched to 50 Ohm. Blocking - 2, 11 RFIN, RFOUT capacitors are required if RF line potential is not equal to 0V. L A t I G 4, 5, 6, 7, 8, 9 V6 - V1 See truth table and control voltage table. I D - s This pin should be connected to PCB RF 13, 14, 16 N/C r ground to maximize performance o t A 15 VEE Supply Voltage -5V ± 10% u n e t t A 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. For price, delivery and to place orders: Hittite Microwave Corporation, 20 Alpha Road, Chelmsford, MA 01824 5 Phone: 978-250-3343 Fax: 978-250-3373 Order On-line at www.hittite.com Application Support: Phone: 978-250-3343 or apps@hittite.com

HMC424LP3E v08.0809 0.5dB LSB GaAs MMIC 6-BIT DIGITAL ATTENUATOR, DC - 13 GHz Evaluation PCB t M s - L A t I G I D - s r o t A * R1 - R6 = 100 Ohm. u These resistors are optional and may be used to enhance n decoupling of the RF path e from the control inputs. t t A List of Materials for Evaluation PCB 105406 [1] The circuit board used in the application should use Item Description RF circuit design techniques. Signal lines should J1 - J2 PCB Mount SMA Connector have 50 Ohm impedance while the package ground J3 8 Pin DC Connector leads and exposed paddle should be connected C1 0.01 µF Capacitor, 0603 Pkg. directly to the ground plane similar to that shown. R1 - R6 100 Ohm Resistor, 0603 Pkg. A sufficient number of via holes should be used to U1 HMC424LP3 / HMC424LP3E Digital Attenuator connect the top and bottom ground planes. The eval- PCB [2] 105245 Evaluation PCB uation circuit board shown is available from Hittite [1] Reference this number when ordering complete evaluation PCB upon request. [2] Circuit Board Material: Rogers 4350 For price, delivery and to place orders: Hittite Microwave Corporation, 20 Alpha Road, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373 Order On-line at www.hittite.com 6 Application Support: Phone: 978-250-3343 or apps@hittite.com

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