HMC424LP3 / 424LP3E v08.0809 ATTENUATORS - DIGITAL - SMT 5 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 • Basestation Infrastructure Single Control Line Per Bit • Fiber Optics & Broadband Telecom ± 0.5 dB Typical Bit Error • Microwave & VSAT Radios 9mm2 Leadless SMT Plastic Package • Military & Space • Test Instrumentation Functional Diagram General Description The HMC424LP3 & HMC424LP3E are broadband 6-bit GaAs IC digital attenuators in low cost leadless surface mount packages. 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 Specifi cations, TA = +25° C, With Vee = -5V & VCTL= 0/-5V Parameter Frequency (GHz) Typ. Max. Units Insertion Loss DC - 4 GHz 4.0 - 8.0 GHz 8.0 - 13.0 GHz Min. 3.1 3.5 4.0 3.8 4.0 4.6 dB dB dB Attenuation Range DC - 13.0 GHz 31.5 dB Return Loss (RF1 & RF2, All Atten. States) DC - 13.0 GHz 12 dB ± 0.3 + 3% of Atten. Setting Max ± 0.3 + 5% of Atten. Setting Max dB dB 9 Attenuation Accuracy: (Referenced to Insertion Loss) 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) 5 - 110 REF State All Other States DC - 13.0 GHz DC - 13.0 GHz 1.0 - 13.0 Ghz 22 dBm 1.0 - 13.0 Ghz 46 32 dBm dBm 30 50 ns ns DC - 13.0 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 HMC424LP3E v08.0809 0.5dB LSB GaAs MMIC 6-BIT DIGITAL ATTENUATOR, DC - 13 GHz (Only Major States are Shown) 0 -2 -5 RETURN LOSS (dB) INSERTION LOSS (dB) 0 -4 +25 C +85 C -40 C -6 -8 0.5 dB 1 dB 2 dB 4 dB 8 dB 16 dB 31.5 dB -10 -15 -20 -10 -25 0 3 6 9 12 15 0 3 6 FREQUENCY (GHz) 9 12 15 FREQUENCY (GHz) Normalized Attenuation Bit Error vs. Attenuation State (Only Major States are Shown) 2 -5 0.1 GHz 4 GHz 8 GHz 13 GHz 1 -10 BIT ERROR (dB) NORMALIZED ATTENUATION (dB) 0 -15 -20 0.5 dB 1 dB 2 dB 4 dB -25 8 dB 16 dB 31.5 dB 0 -1 -30 -35 -2 0 3 6 9 12 0 15 4 8 12 16 20 24 28 32 ATTENUATION STATE (dB) FREQUENCY (GHz) Bit Error vs. Frequency Relative Phase vs. Frequency (Only Major States are Shown) (Only Major States are Shown) 2 100 8 dB 16 dB 31.5 dB 0.5 dB 1 dB 2 dB 4 dB 80 RELATIVE PHASE (deg) 0.5 dB 1 dB 2 dB 4 dB 1 BIT ERROR (dB) ATTENUATORS - DIGITAL - SMT 5 Return Loss RF1, RF2 Insertion Loss 0 -1 8 dB 16 dB 31.5 dB 60 40 20 0 -2 -20 0 3 6 9 FREQUENCY (GHz) 12 15 0 3 6 9 12 15 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 5 - 111 HMC424LP3E v08.0809 0.5dB LSB GaAs MMIC 6-BIT DIGITAL ATTENUATOR, DC - 13 GHz 5 Worst Case Step Error Between Successive Attenuation States Bias Voltage & Current Vee Range= -5 Vdc ± 10% 1 STEP ERROR (dB) ATTENUATORS - DIGITAL - SMT 2 Vee (VDC) Iee (Typ.) (mA) Iee (Max.) (mA) -5 2 5 0 Control Voltage -1 -2 0 3 6 9 12 15 State Bias Condition Low 0 to -3V @ 35 μA Typ. High Vee to Vee +0.8V @ 5 μA Typ. FREQUENCY (GHz) Truth Table Control Voltage Input Attenuation State RF1 - RF2 V1 16 dB V2 8 dB V3 4 dB V4 2 dB V5 1 dB V6 0.5 dB Low Low Low Low Low Low Reference I.L. Low Low Low Low Low High 0.5 dB 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. 5 - 112 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 HMC424LP3E v08.0809 0.5dB LSB GaAs MMIC 6-BIT DIGITAL ATTENUATOR, DC - 13 GHz 5 Control Voltage (V1 to V6) Vee - 0.5 Vdc Bias Voltage (Vee) -7 Vdc Channel Temperature 150 °C Thermal Resistance 330 °C/W Storage Temperature -65 to + 150 °C Operating Temperature -55 to +85 °C RF Input Power (0.5 - 13 GHz) +25 dBm ATTENUATORS - DIGITAL - SMT Absolute Maximum Ratings 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 Package Body Material Lead Finish MSL Rating HMC424LP3 Low Stress Injection Molded Plastic Sn/Pb Solder MSL1 HMC424LP3E RoHS-compliant Low Stress Injection Molded Plastic 100% matte Sn MSL1 Package Marking [3] [1] 424 XXXX [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, 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 - 113 HMC424LP3E v08.0809 0.5dB LSB GaAs MMIC 6-BIT DIGITAL ATTENUATOR, DC - 13 GHz ATTENUATORS - DIGITAL - SMT 5 Pin Description Pad Number Function Description 1, 3, 10, 12 GND Package bottom has an exposed metal paddle that must also be connected to RF ground 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% Interface Schematic 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. 5 - 114 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 HMC424LP3E v08.0809 0.5dB LSB GaAs MMIC 6-BIT DIGITAL ATTENUATOR, DC - 13 GHz * R1 - R6 = 100 Ohm. These resistors are optional and may be used to enhance decoupling of the RF path from the control inputs. ATTENUATORS - DIGITAL - SMT 5 Evaluation PCB List of Materials for Evaluation PCB 105406 [1] Item Description J1 - J2 PCB Mount SMA Connector J3 8 Pin DC Connector C1 0.01 μF Capacitor, 0603 Pkg. R1 - R6 100 Ohm Resistor, 0603 Pkg. U1 HMC424LP3 / HMC424LP3E Digital Attenuator PCB [2] 105245 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 5 - 115