HMC472LP4 v00.0604 0.5 dB LSB GaAs MMIC 6-BIT DIGITAL POSITIVE CONTROL ATTENUATOR, DC - 3.0 GHz ATTENUATORS - SMT 9 Typical Applications Features The HMC472LP4 is ideal for both RF 0.5 dB LSB Steps to 31.5 dB and IF applications: Single Control Line Per Bit • Cellular; UMTS/3G Infrastructure TTL/CMOS Compatible Control • ISM, MMDS, WLAN, WiMAX +/- 0.5 dB Typical Step Error • Microwave Radio & VSAT Single +5V Supply • Test Equipment & Sensors 4 mm x 4 mm x 1 mm SMT Package Functional Diagram General Description The HMC472LP4 is a broadband 6-bit GaAs IC digital attenuator in a low cost leadless surface mount package. 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 2.0 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 +45 dBm. Six TTL/CMOS control inputs 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 (Unless Otherwise Noted) Parameter Typ. Max. Units Insertion Loss DC - 1.5 GHz 1.5 - 3.0 GHz 1.5 2.0 1.8 2.3 dB dB Attenuation Range DC - 3.0 GHz 31.5 dB Return Loss (RF1 & RF2, All Atten. States) DC - 3.0 GHz 15 dB DC - 3.0 GHz ± (0.4 + 4% of Atten. Setting) Max. ± (0.5 + 4% of Atten. Setting) Max. dB dB 0.1 - 3.0 GHz 20 dBm 0.1 - 3.0 GHz 45 35 dBm dBm 130 140 ns ns Attenuation Accuracy: (Referenced to Insertion Loss) Frequency (GHz) REF - 15.5 dB 16.0 - 31.5 dB Input Power for 0.1 dB Compression Input Third Order Intercept Point (Two-Tone Input Power= 0 dBm Each Tone) REF - 15.5 dB States 16.0 - 31.5 dB States Min. Switching Characteristics DC - 3.0 GHz tRISE, tFALL (10/90% RF) tON, tOFF (50% CTL to 10/90% RF) 9 - 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 HMC472LP4 v00.0604 0.5 dB LSB GaAs MMIC 6-BIT DIGITAL POSITIVE CONTROL ATTENUATOR, DC - 3.0 GHz Return Loss RF1, RF2 SUB-HARMONICALLY (Only PUMPED MIXER 17 - 25 GHz Major States are Shown) 0 0 -0.5 -5 9 0.5-16 dB +25 C +85 C -1 -40 C -1.5 -2 -10 -15 -20 -25 31.5 dB -2.5 -30 -3 -35 0 0.5 1 1.5 2 2.5 3 3.5 0 4 0.5 1 1.5 2 2.5 3 3.5 4 FREQUENCY (GHz) FREQUENCY (GHz) Normalized Attenuation (Only Major States are Shown) Bit Error vs. Attenuation State 1 0.8 -5 0.6 -10 BIT ERROR (dB) NORMALIZED ATTENUATION (dB) 0 -15 -20 -25 3 GHz 0.4 40 MHz 0.2 500 MHz 0 -0.2 -0.4 -0.6 -30 -0.8 -35 1 GHz 2 GHz -1 0 0.5 1 1.5 2 2.5 3 3.5 4 0 4 8 FREQUENCY (GHz) 12 16 20 24 28 32 3.5 4 ATTENUATION STATE (dB) Bit Error vs. Frequency Relative Phase vs. Frequency (Only Major States are Shown) (Only Major States are Shown) 100 2 1.5 RELATIVE PHASE (deg) 80 0.5-4 dB 1 BIT ERROR (dB) ATTENUATORS - SMT RETURN LOSS (dB) INSERTION LOSS (dB) GaAs MMIC Insertion Loss 31.5 dB 0.5 0 -0.5 -1 8 dB 16 dB -1.5 60 40 31.5 dB 16 dB 20 8 dB 0 -20 0.5-4 dB -2 -40 0 0.5 1 1.5 2 2.5 FREQUENCY (GHz) 3 3.5 4 0 0.5 1 1.5 2 2.5 3 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 9 - 145 HMC472LP4 v00.0604 0.5 dB LSB GaAs MMIC 6-BIT DIGITAL POSITIVE CONTROL ATTENUATOR, DC - 3.0 GHz Worst Case Step Error Between Successive Attenuation States 9 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 4.7 +5.0 5.0 +5.5 5.3 Control Voltage State Bias Condition Low 0 to +0.8 Vdc @ -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 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. Note: Vdd = +5V 9 - 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 HMC472LP4 v00.0604 0.5 dB LSB GaAs MMIC 6-BIT DIGITAL POSITIVE CONTROL ATTENUATOR, DC - 3.0 GHz Absolute Maximum Ratings +27 dBm (T = +85 °C) Control Voltage Range (V1 to V6) -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 9 ATTENUATORS - SMT RF Input Power (DC - 3.0 GHz) ELECTROSTATIC SENSITIVE DEVICE OBSERVE HANDLING PRECAUTIONS 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. 9. CLASSIFIED AS MOISTURE SENSITIVITY LEVEL (MSL) 1. 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 9 - 147 HMC472LP4 v00.0604 0.5 dB LSB GaAs MMIC 6-BIT DIGITAL POSITIVE CONTROL ATTENUATOR, DC - 3.0 GHz Pin Descriptions ATTENUATORS - SMT 9 Pin Number Function Description 1, 3, 5, 12, 14, 16, 17, 18 N/C These pins should be connected to PCB RF ground to maximize performance. 2 Vdd Supply Voltage. 4, 15 RF1, RF2 This pin is DC coupled and matched to 50 Ohm. Blocking capacitors are required. Select value based on lowest frequency of operation. 6 - 11, 13 ACG1 - ACG7 External capacitor to ground is required. Select value for lowest frequency of operation. Place capacitor as close to pins as possible. 19 - 24 V1 - V6 See truth table and control voltage table. GND Package bottom has an exposed metal paddle that must also be connected to RF/DC Ground. Interface Schematic Application Circuit 9 - 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 HMC472LP4 v00.0604 0.5 dB LSB GaAs MMIC 6-BIT DIGITAL POSITIVE CONTROL ATTENUATOR, DC - 3.0 GHz Evaluation PCB ATTENUATORS - SMT 9 List of Material for Evaluation PCB 107010 [1] Item Description J1 - J2 PC Mount SMA Connector J3 14 Pin DC Connector C1 1000 pF Capacitor, 0603 Pkg. C2, C3 1000 pF Capacitor, 0402 Pkg. C4 - C7 330 pF Capacitor, 0402 Pkg. U1 HMC472LP4 Digital Attenuator PCB [2] 106977 Evaluation PCB [1] Reference this number when ordering complete 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. [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 9 - 149