HMC425LP3 v00.0202 MICROWAVE CORPORATION 0.5 dB LSB GaAs MMIC 6-BIT DIGITAL POSITIVE CONTROL ATTENUATOR, 2.4 - 8.0 GHz ATTENUATORS - SMT 9 Typical Applications Features The HMC425LP3 is ideal for: 0.5 dB LSB Steps to 31.5 dB • WLAN & Point-to-Multi-Point Single Control Line Per Bit • Fiber Optics & Broadband Telecom +/- 0.5 dB Typical Bit Error • Microwave Radio & VSAT Single +5V Supply • Military 3 mm x 3 mm x 1 mm SMT Package Functional Diagram General Description The HMC425LP3 is a broadband 6-bit GaAs IC digital attenuator in a low cost leadless surface mount package. Covering 2.4 to 8.0 GHz, the insertion loss is less then 3.8 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 +40 dBm. Six control voltage inputs, toggled between 0 and +3 to +5V, are used to select each attenuation state. A single Vdd bias of +3 to +5V is required. Electrical Specifications, TA = +25° C, With Vdd = +5V & Vctl = 0/+5V (Unless Otherwise Noted) Frequency (GHz) Parameter Typ. Max. Units 3.5 4.3 dB dB Insertion Loss 2.4 - 6.0 GHz 6.0 - 8.0 GHz 3.0 3.8 Attenuation Range 2.4 - 8.0 GHz 31.5 dB Return Loss (RF1 & RF2, All Atten. States) 2.4 - 8.0 GHz 15 dB 11 Attenuation Accuracy: (Referenced to Insertion Loss) All States 2.4 - 8.0 GHz ± 0.5 + 5% of Atten. Setting Max. dB Input Power for 0.1 dB Compression Vdd = 5V Vdd = 3V 2.4 - 8.0 GHz 22 19 dBm dBm REF - 16.0 dB States 16.5 - 31.5 dB States 2.4 - 8.0 GHz 45 35 dBm dBm 160 180 ns ns 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) 9 - 92 Min. 2.4 - 8.0 GHz 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 HMC425LP3 v00.0202 MICROWAVE CORPORATION 0.5 dB LSB GaAs MMIC 6-BIT DIGITAL POSITIVE CONTROL ATTENUATOR, 2.4 - 8.0 GHz GaAs MMIC Insertion Loss Return Loss RF1, RF2 SUB-HARMONICALLY (Only PUMPED MIXER 17 - 25 GHz Major States are Shown) 0 -3 -4 -5 -6 -7 +25 C +85 C -40 C -8 9 0.5 dB 1 dB 2 dB 4 dB 8 dB 16 dB 31.5 dB -5 RETURN LOSS (dB) INSERTION LOSS (dB) -2 -10 -15 -20 -9 -10 -25 1 2 3 4 5 6 7 8 9 10 1 2 3 FREQUENCY (GHz) 4 5 6 7 8 9 10 FREQUENCY (GHz) Normalized Attenuation Bit Error vs. Attenuation State 0 2 -5 1.5 2.4 GHz 3.5 GHz 5.5 GHz 8.0 GHz 1 -10 BIT ERROR (dB) NORMALIZED ATTENUATION (dB) (Only Major States are Shown) -15 -20 0.5 dB 1 dB 2 dB 4 dB 8 dB 16 dB 31.5 dB -25 -30 0.5 0 -0.5 -1 -1.5 -35 -2 1 2 3 4 5 6 7 8 9 0 10 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 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 80 0.5 dB 1 dB 2 dB 4 dB 8 dB 16 dB 31.5 dB 1 0.5 0.5 dB 1 dB 2 dB 4 dB 8 dB 16 dB 31.5 dB 60 RELATIVE PHASE (deg) 1.5 BIT ERROR (dB) ATTENUATORS - SMT 0 -1 0 -0.5 -1 40 20 0 -20 -1.5 -2 -40 1 2 3 4 5 6 FREQUENCY (GHz) 7 8 9 10 1 2 3 4 5 6 7 8 9 10 FREQUENCY (GHz) 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 - 93 HMC425LP3 v00.0202 MICROWAVE CORPORATION 0.5 dB LSB GaAs MMIC 6-BIT DIGITAL POSITIVE CONTROL ATTENUATOR, 2.4 - 8.0 GHz Worst Case Step Error Between Successive Attenuation States Bias Voltage & Current 2 Vdd (VDC) Idd (Typ.) (µA) 0.5 +3.0 10 0 +5.0 30 1 STEP ERROR (dB) ATTENUATORS - SMT 9 Vdd Range = 3.0 to +5.0 Vdc 1.5 -0.5 Control Voltage -1 -1.5 State Bias Condition Low 0 to 0.2V @ 10 uA Typ. High Vdd ± 0.2V @ 5 uA Typ. -2 1 2 3 4 5 6 7 8 9 10 FREQUENCY (GHz) Note: Vdd = +3V to +5V 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 High High High High High High Reference I.L. High High High High High Low 0.5 dB High High High High Low High 1 dB High High High Low High High 2 dB High High Low High High High 4 dB High Low High High High High 8 dB Low High High High High High 16 dB Low Low Low Low Low Low 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 HMC425LP3 v00.0202 MICROWAVE CORPORATION 0.5 dB LSB GaAs MMIC 6-BIT DIGITAL POSITIVE CONTROL ATTENUATOR, 2.4 - 8.0 GHz Absolute Maximum Ratings Vdd +0.5 Vdc Bias Voltage (Vdd) +7.0 Vdc Staorage Temperature -65 to +150 °C Operating Temperature -40 to +85 °C RF Input Power (2.4 - 8.0 GHz) +30 dBm 9 ATTENUATORS - SMT Control Voltage (V1 to V6) Outline Drawing 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. 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 HMC425LP3 v00.0202 MICROWAVE CORPORATION 0.5 dB LSB GaAs MMIC 6-BIT DIGITAL POSITIVE CONTROL ATTENUATOR, 2.4 - 8.0 GHz Pin Descriptions ATTENUATORS - SMT 9 9 - 96 Pin 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. 4, 5, 6, 7, 8, 9 V1 - V6 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 Vdd Supply Voltage. Interface Schematic 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 v00.0202 MICROWAVE CORPORATION HMC425LP3 0.5 dB LSB GaAs MMIC 6-BIT DIGITAL POSITIVE CONTROL ATTENUATOR, 2.4 - 8.0 GHz Evaluation PCB * R1 - R6 = 100 Ohm. These resistors are optional and may be used to enhance decoupling of the RF path from the control inputs. ATTENUATORS - SMT 9 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 Description J1 - J2 PC Mount SMA Connector J3 8 Pin DC Connector C1 0.01 µF Capacitor, 0603 Pkg. C2, C3 100 pF Capacitor, 0402 Pkg. R1 - R6 100 Ohm Resistor, 0603 Pkg. U1 HMC425LP3 Digital Attenuator PCB* 105260 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 9 - 97