HMC470LP3 / 470LP3E v02.0605 1 dB LSB GaAs MMIC 5-BIT DIGITAL POSITIVE CONTROL ATTENUATOR, DC - 3.0 GHz Designer’s Kit Available ATTENUATORS - SMT 6 Typical Applications Features The HMC470LP3 /HMC470LP3E is ideal for both RF and IF applications: 1 dB LSB Steps to 31 dB • Cellular; UMTS/3G Infrastructure TTL/CMOS Compatible Control • ISM, MMDS, WLAN, WiMAX +/- 0.3 dB Typical Step Error • Microwave Radio & VSAT Single +5V Supply • Test Equipment and Sensors 3 x 3 mm SMT Package Single Control Line Per Bit Included in the HMC-DK004 Designer’s Kit Functional Diagram General Description The HMC470LP3 & HMC470LP3E are broadband 5-bit GaAs IC digital attenuators in low cost leadless surface mount packages. This single positive control line per bit digital attenuator incorporates off chip AC ground capacitors for near DC operation, making it suitable for a wide variety of RF and IF applications. Covering DC to 3.0 GHz, the insertion loss is less than 1.5 dB typical. The attenuator bit values are 1 (LSB), 2, 4, 8, and 16 dB for a total attenuation of 31 dB. Attenuation accuracy is excellent at ± 0.3 dB typical step error with an IIP3 of +45 dBm. Five TTL/CMOS control inputs are used to select each attenuation state. A single Vdd bias of +5V is required. Electrical Specifications, TA = +25° C, With Vdd = +5V & Vctl = 0/+5V (Unless Otherwise Noted) Parameter Typ. Max. Units Insertion Loss DC - 1.5 GHz 1.5 - 2.3 GHz 2.3 - 3.0 GHz 1.3 1.4 1.7 1.6 1.7 2.0 dB dB dB Attenuation Range DC - 3.0 GHz 31 dB Return Loss (RF1 & RF2, All Atten. States) DC - 3.0 GHz 17 dB Attenuation Accuracy: (Referenced to Insertion Loss) All Attenuation States 1.0 - 15.0 dB States 16.0 - 31.0 dB States DC - 2.3 GHz 2.3 - 3.0 GHz 2.3 - 3.0 GHz Input Power for 0.1 dB Compression 0.1 - 3.0 GHz 20 dBm 0.1 - 3.0 GHz 45 35 dBm dBm 160 180 ns ns Input Third Order Intercept Point (Two-Tone Input Power= 0 dBm Each Tone) Frequency (GHz) REF - 15 dB States 16 - 31 dB States Min. ± (0.3 + 2% of Atten. Setting) Max. ± (0.3 + 3% of Atten. Setting) Max. ± (0.3 + 6% of Atten. Setting) Max. dB dB dB Switching Characteristics DC - 3.0 GHz tRISE, tFALL (10/90% RF) tON, tOFF (50% CTL to 10/90% RF) 6 - 144 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 HMC470LP3 / 470LP3E v02.0605 1 dB LSB GaAs MMIC 5-BIT DIGITAL POSITIVE CONTROL ATTENUATOR, DC - 3.0 GHz Return Loss RF1, RF2 (Only Major States are Shown) 0 -0.5 -5 -1 -1.5 -2 +25 C +85 C -40 C -2.5 6 I.L.dB -10 16 dB 8 dB -15 -20 -25 4 dB -30 31 dB 2 dB 1 dB -3 -35 0 0.5 1 1.5 2 2.5 3 3.5 0 4 0.5 1 FREQUENCY (GHz) 1.5 2 2.5 3 3.5 4 28 32 FREQUENCY (GHz) Normalized Attenuation Bit Error vs. Attenuation State 0 2 -5 1.5 3 GHz -10 BIT ERROR (dB) NORMALIZED ATTENUATION (dB) (Only Major States are Shown) -15 -20 -25 40 MHz 1 500 MHz 0.5 0 -0.5 -30 -35 1 GHz 2 GHz 100 MHz -1 0 0.5 1 1.5 2 2.5 3 3.5 4 0 4 8 FREQUENCY (GHz) 12 16 20 24 ATTENUATION STATE (dB) Bit Error vs. Frequency Relative Phase vs. Frequency (Only Major States are Shown) (Only Major States are Shown) 100 80 RELATIVE PHASE (deg) 2 1.5 1 BIT ERROR (dB) ATTENUATORS - SMT 0 RETURN LOSS (dB) INSERTION LOSS (dB) Insertion Loss 31 dB 16 dB 0.5 0 -0.5 1-8 dB -1 60 31 dB 40 16 dB 20 0 -1.5 -20 -2 -40 8 dB 0 0.5 1 1.5 2 2.5 FREQUENCY (GHz) 3 3.5 4 1-4 dB 0 0.5 1 1.5 2 2.5 3 3.5 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 6 - 145 HMC470LP3 / 470LP3E v02.0605 1 dB LSB GaAs MMIC 5-BIT DIGITAL POSITIVE CONTROL ATTENUATOR, DC - 3.0 GHz Worst Case Step Error Between Successive Attenuation States 6 1 0.8 STEP ERROR (dB) ATTENUATORS - SMT 0.6 0.4 0.2 0 -0.2 -0.4 -0.6 -0.8 -1 0 0.5 1 1.5 2 2.5 3 3.5 4 FREQUENCY (GHz) Bias Voltage & Current Truth Table Vdd = +5.0 Vdc ± 10% Vdd (VDC) Control Voltage Input Idd (Typ.) (mA) +4.5 4.0 +5.0 4.2 +5.5 4.4 Control Voltage State Bias Condition Low 0 to +0.8V @ -5 uA Typ. High +2.0 to + 5.0 Vdc @ 40 uA Typ. V2 8 dB V3 4 dB V4 2 dB V5 1 dB High High High High High High High High High Low 1 dB High High High Low High 2 dB High High Low High High 4 dB High Low High High High 8 dB Low High High High High 16 dB Low Low Low Low Low 31 dB Reference I.L. Any combination of the above states will provide an attenuation approximately equal to the sum of the bits selected. Note: Vdd = +5V 6 - 146 Attenuation State RF1 - RF2 V1 16 dB 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 HMC470LP3 / 470LP3E v02.0605 1 dB LSB GaAs MMIC 5-BIT DIGITAL POSITIVE CONTROL ATTENUATOR, DC - 3.0 GHz Absolute Maximum Ratings +27 dBm (T = +85 °C) Control Voltage Range (V1 to V5) -1V to Vdd +1V Bias Voltage (Vdd) +7.0 Vdc Channel Temperature 150 °C Continuous Pdiss (T = 85 °C) (derate 7.7 mW/°C above 85 °C) 0.5 W Thermal Resistance 130 °C/W Storage Temperature -65 to +150 °C Operating Temperature -40 to +85 °C ELECTROSTATIC SENSITIVE DEVICE OBSERVE HANDLING PRECAUTIONS 6 ATTENUATORS - SMT RF Input Power (DC - 3.0 GHz) 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 HMC470LP3 Low Stress Injection Molded Plastic Sn/Pb Solder MSL1 HMC470LP3E RoHS-compliant Low Stress Injection Molded Plastic 100% matte Sn MSL1 Package Marking [3] [1] 470 XXXX [2] 470 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 6 - 147 HMC470LP3 / 470LP3E v02.0605 1 dB LSB GaAs MMIC 5-BIT DIGITAL POSITIVE CONTROL ATTENUATOR, DC - 3.0 GHz Pin Descriptions ATTENUATORS - SMT 6 Pin Number Function Description 1 Vdd Supply Voltage. 2, 11 RF1, RF2 This pin is DC coupled and matched to 50 Ohm. Blocking capacitors are required. Select value based on lowest frequency of operation. 3, 10 N/C These pins should be connected to PCB RF ground to maximize performance. 4-9 ACG1 - ACG6 External capacitor to ground is required. Select value for lowest frequency of operation. Place capacitor as close to pins as possible. 12 - 16 V1 - V5 See truth table and control voltage table. GND Package bottom has an exposed metal paddle that must also be connected to RF Ground. Interface Schematic Application Circuit 6 - 148 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 HMC470LP3 / 470LP3E v02.0605 1 dB LSB GaAs MMIC 5-BIT DIGITAL POSITIVE CONTROL ATTENUATOR, DC - 3.0 GHz Evaluation PCB ATTENUATORS - SMT 6 List of Materials for Evaluation PCB 107006 [1] Item Description J1 - J2 PC Mount SMA Connector J3 12 Pin DC Connector C1 1000 pF Capacitor, 0603 Pkg. C2, C3 1000 pF Capacitor, 0402 Pkg. C4 - C7 330 pF Capacitor, 0402 Pkg. U1 HMC470LP3 / HMC470LP3E Digital Attenuator PCB [2] 106978 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 4350Re 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 6 - 149