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| v00.0202 MICROWAVE CORPORATION HMC425LP3 Features 0.5 dB LSB Steps to 31.5 dB Single Control Line Per Bit +/- 0.5 dB Typical Bit Error Single +5V Supply 3 mm x 3 mm x 1 mm SMT Package 0.5 dB LSB GaAs MMIC 6-BIT DIGITAL POSITIVE CONTROL ATTENUATOR, 2.4 - 8.0 GHz Typical Applications The HMC425LP3 is ideal for: 9 ATTENUATORS - SMT * WLAN & Point-to-Multi-Point * Fiber Optics & Broadband Telecom * Microwave Radio & VSAT * Military 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) Parameter Frequency (GHz) 2.4 - 6.0 GHz 6.0 - 8.0 GHz 2.4 - 8.0 GHz 2.4 - 8.0 GHz All States Vdd = 5V Vdd = 3V REF - 16.0 dB States 16.5 - 31.5 dB States 2.4 - 8.0 GHz 11 Min. Typ. 3.0 3.8 31.5 15 Max. 3.5 4.3 Units dB dB dB dB dB dBm dBm dBm dBm 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 tRISE, tFALL (10/90% RF) tON, tOFF (50% CTL to 10/90% RF) 0.5 + 5% of Atten. Setting Max. 22 19 45 35 2.4 - 8.0 GHz 2.4 - 8.0 GHz 2.4 - 8.0 GHz 160 180 ns ns 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 v00.0202 MICROWAVE CORPORATION HMC425LP3 0.5 dB LSB GaAs MMIC 6-BIT DIGITAL POSITIVE CONTROL ATTENUATOR, 2.4 - 8.0 GHz GaAs MMIC Insertion Loss 0 -1 -2 INSERTION LOSS (dB) -3 -4 -5 -6 -7 -8 -9 -10 1 2 3 4 5 6 7 8 9 10 FREQUENCY (GHz) -25 1 2 3 4 5 6 7 8 9 10 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 1 2 3 4 5 6 7 8 9 10 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 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 ATTENUATION STATE (dB) 2.4 GHz 3.5 GHz 5.5 GHz 8.0 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 1 2 3 4 5 6 7 8 9 10 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) 80 60 RELATIVE PHASE (deg) 40 20 0 -20 -40 1 2 3 4 5 6 7 8 9 10 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 v00.0202 MICROWAVE CORPORATION HMC425LP3 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 2 Bias Voltage & Current Vdd Range = 3.0 to +5.0 Vdc Vdd (VDC) +3.0 +5.0 Idd (Typ.) (A) 10 30 STEP ERROR (dB) 9 ATTENUATORS - SMT 1.5 1 0.5 0 -0.5 -1 -1.5 -2 1 2 3 4 5 6 7 8 9 10 Control Voltage State Low High Note: Vdd = +3V to +5V Bias Condition 0 to 0.2V @ 10 uA Typ. Vdd 0.2V @ 5 uA Typ. FREQUENCY (GHz) Truth Table Control Voltage Input V1 16 dB High High High High High High Low Low 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 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 v00.0202 MICROWAVE CORPORATION HMC425LP3 0.5 dB LSB GaAs MMIC 6-BIT DIGITAL POSITIVE CONTROL ATTENUATOR, 2.4 - 8.0 GHz Absolute Maximum Ratings Control Voltage (V1 to V6) Bias Voltage (Vdd) Staorage Temperature Operating Temperature RF Input Power (2.4 - 8.0 GHz) Vdd +0.5 Vdc +7.0 Vdc -65 to +150 C -40 to +85 C 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. +30 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 v00.0202 MICROWAVE CORPORATION HMC425LP3 0.5 dB LSB GaAs MMIC 6-BIT DIGITAL POSITIVE CONTROL ATTENUATOR, 2.4 - 8.0 GHz Pin Descriptions 9 ATTENUATORS - SMT Pin Number Function Description Interface Schematic 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. Supply Voltage. 15 Vdd 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 v00.0202 MICROWAVE CORPORATION HMC425LP3 0.5 dB LSB GaAs MMIC 6-BIT DIGITAL POSITIVE CONTROL ATTENUATOR, 2.4 - 8.0 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 C2, C3 R1 - R6 U1 PCB* Description PC Mount SMA Connector 8 Pin DC Connector 0.01 F Capacitor, 0603 Pkg. 100 pF Capacitor, 0402 Pkg. 100 Ohm Resistor, 0603 Pkg. HMC425LP3 Digital Attenuator 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 |
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