HMC468LP3 / 468LP3E v03.1107 1 dB LSB GaAs MMIC 3-BIT DIGITAL POSITIVE CONTROL ATTENUATOR, DC - 6 GHz ATTENUATORS - SMT 5 Typical Applications Features The HMC468LP3 / HMC468LP3E is ideal for: 1 dB LSB Steps to 7 dB • Cellular; UMTS/3G Infrastructure High IP3: +50 dBm • Fixed Wireless & WLL ± 0.25 dB Typical Bit Error • Microwave Radio & VSAT Single Control Line Per Bit Single +5V Supply • Test Equipment 16 Lead 3x3mm SMT Package: 9mm2 Included in the HMC-DK004 Designer’s Kit Functional Diagram General Description The HMC468LP3 & HMC468LP3E are broadband 3-bit GaAs IC digital attenuators in low cost leadless surface mount packages. Covering DC to 6.0 GHz, the insertion loss is less than 1 dB typical up to 4 GHz. The attenuator bit values are 1 (LSB), 2 and 4 dB for a total attenuation of 7 dB. Attenuation accuracy is excellent at ±0.4 dB typical step error with an IIP3 of +50 dBm. Three control voltage inputs, toggled between 0 and +5V, are used to select each attenuation state. A single Vdd bias of +5V is required. Electrical Specifi cations, TA = +25° C, With Vdd = +5V & Vctl = 0/+5V Parameter Frequency (GHz) Typ. Max. Units DC - 2.5 GHz 2.5 - 4.5 GHz 4.5 - 6.0 GHz 0.7 0.9 1.3 1.0 1.3 1.8 dB dB dB DC - 6 GHz 7 dB DC - 4 GHz 4.0 - 6.0 GHz 20 15 dB dB DC - 2.5 GHz 2.5 - 6.0 GHz 2.5 - 6.0 GHz ± 0.2 + 2% of Atten. Setting Max. ± 0.3 + 3% of Atten. Setting Max. ± 0.4 + 4% of Atten. Setting Max. dB dB dB Input Power for 0.1 dB Compression 0.25 - 6.0 GHz 20 dBm Input Third Order Intercept Point (Two-Tone Input Power= 0 dBm Each Tone) 0.25 - 6.0 GHz 50 dBm 110 135 ns ns Insertion Loss Attenuation Range Return Loss (RF1 & RF2, All Atten. States) Attenuation Accuracy: (Referenced to Insertion Loss) Switching Characteristics All States 1 - 4 dB States 5 - 7 dB States Min. DC - 6 GHz tRISE, tFALL (10/90% RF) tON, tOFF (50% CTL to 10/90% RF) * Bypass capacitor connecting ACG1, ACG2 & ACG3 to RF ground required per pin description herein. 5 - 138 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 HMC468LP3 / 468LP3E v03.1107 1 dB LSB GaAs MMIC 3-BIT DIGITAL POSITIVE CONTROL ATTENUATOR, DC - 6 GHz (Only Major States are Shown) 0 -0.5 -5 RETURN LOSS (dB) INSERTION LOSS (dB) 0 -1 -1.5 +25 C +85 C -40 C -2 -2.5 IL 1 dB 2 dB 4 dB 7 dB -10 -15 -20 -25 -30 -3 -35 0 1 2 3 4 5 0 6 1 FREQUENCY (GHz) 2 3 4 5 6 FREQUENCY (GHz) Normalized Attenuation Bit Error vs. Attenuation State 0 1 -2 0.6 BIT ERROR (dB) NORMALIZED ATTENUATION (dB) (Only Major States are Shown) -4 -6 -8 1 dB 2 dB 0.2 -0.2 80 MHz 500 MHz 1 GHz 2 GHz -0.6 4 dB 7 dB -10 3 GHz 4 GHz 5 GHz 6 GHz -1 0 1 2 3 4 5 6 1 2 FREQUENCY (GHz) 3 4 5 6 7 5 6 ATTENUATION STATE (dB) Bit Error vs. Frequency Relative Phase vs. Frequency (Only Major States are Shown) (Only Major States are Shown) 1 20 15 RELATIVE PHASE (deg) 0.6 BIT ERROR (dB) ATTENUATORS - SMT 5 Return Loss RF1, RF2 Insertion Loss 0.2 -0.2 1 dB 2 dB 4 dB 7 dB -0.6 1 dB 2 dB 4 dB 7 dB 10 5 0 -5 -1 -10 0 1 2 3 4 FREQUENCY (GHz) 5 6 0 1 2 3 4 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 - 139 HMC468LP3 / 468LP3E v03.1107 1 dB LSB GaAs MMIC 3-BIT DIGITAL POSITIVE CONTROL ATTENUATOR, DC - 6 GHz 5 Worst Case Step Error Between Successive Attenuation States Truth Table Control Voltage Input 0.6 STEP ERROR (dB) ATTENUATORS - SMT 1 0.2 -0.2 -0.6 Attenuation Setting RF1 - RF2 V1 4 dB V2 2 dB V3 1 dB High High High High High Low 1 dB High Low High 2 dB Low High High 4 dB Low Low Low 7 dB Reference I.L. Any combination of the above states will provide an attenuation approximately equal to the sum of the bits selected. -1 0 1 2 3 4 5 6 FREQUENCY (GHz) Bias Voltage & Current Vdd Range= +5.0 Vdc ± 10% Vdd (Vdc) Idd (Typ.) (mA) Idd (Max.) (mA) +5.0 1.05 1.8 TTL/CMOS Control Voltages 5 - 140 State Bias Condition Low 0 to 0.8 Vdc @ -5 uA Typ. High +2.0 to +5.0 Vdc @ 40 uA Typ. 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 HMC468LP3 / 468LP3E v03.1107 1 dB LSB GaAs MMIC 3-BIT DIGITAL POSITIVE CONTROL ATTENUATOR, DC - 6 GHz Control Voltage (V1 to V3) -0.5 Vdc to Vdd +1 Vdc Bias Voltage (Vdd) +7 Vdc Storage Temperature -65 to +150 °C Operating Temperature -40 to +85 °C RF Input Power +30 dBm ESD Sensitivity (HBM) Class 1A ELECTROSTATIC SENSITIVE DEVICE OBSERVE HANDLING PRECAUTIONS Outline Drawing ATTENUATORS - SMT 5 Absolute Maximum Ratings 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 HMC468LP3 Low Stress Injection Molded Plastic Sn/Pb Solder MSL1 HMC468LP3E RoHS-compliant Low Stress Injection Molded Plastic 100% matte Sn MSL1 Package Marking [3] [1] 468 XXXX [2] 468 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 - 141 HMC468LP3 / 468LP3E v03.1107 1 dB LSB GaAs MMIC 3-BIT DIGITAL POSITIVE CONTROL ATTENUATOR, DC - 6 GHz ATTENUATORS - SMT 5 Pin Descriptions Pin Number Function Description 1, 3, 4, 8, 9, 10, 12 N/C These pins should be connected to PCB RF ground to maximize performance. 2, 11 RF1, RF2 This pin is DC coupled and matched to 50 Ohm. Blocking capacitors are required 13 - 15 V1 - V3 See truth table and control voltage table. 5-7 ACG1 - ACG3 External capacitor to ground is required. Select value for lowest frequency of operation. Place capacitor as close to pins as possible. 16 Vdd Supply Voltage GND Package bottom has an exposed metal paddle that must be connected to RF/DC ground. Interface Schematic Application Circuit 5 - 142 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 HMC468LP3 / 468LP3E v03.1107 1 dB LSB GaAs MMIC 3-BIT DIGITAL POSITIVE CONTROL ATTENUATOR, DC - 6 GHz 5 ATTENUATORS - SMT Evaluation PCB List of Materials for Evaluation PCB 107302 [1] Item Description J1 - J2 PCB Mount SMA Connector J3 - J7 DC Pin C1 1000 pF Capacitor, 0603 Pkg. C2, C3 100 pF Capacitor, 0402 Pkg. C4 3300 pF Capacitor, 0603 Pkg. U1 HMC468LP3 / HMC468LP3E Digital Attenuator PCB [2] 107300 Evaluation PCB 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. [1] Reference this number when ordering complete evaluation PCB [2] Circuit Board Material: Rogers 4350 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 - 143