HMC305LP4 / 305LP4E v03.0809 0.5 dB LSB GaAs MMIC 5-BIT SERIAL CONTROL DIGITAL ATTENUATOR, 0.7 - 3.8 GHz ATTENUATORS - DIGITAL - SMT 5 D E U N I T N O T C C S U I D D O PR Typical Applications Features The HMC305LP4 / HMC305LP4E is ideal for: 0.5 dB LSB Steps to 15.5 dB • Cellular/3G Infrastructure CMOS Compatible Serial Data Interface • Fixed Wireless, WiMax & WiBro SPI Compatible Serial Output • Test Instrumentation ±0.3 dB Typical Bit Error ns g i s De 24 Lead 4x4mm QFN Package: 16mm2 ew N r fo d e d enGeneral Description m m o The HMC305LP4 & HMC305LP4E are broadband ec R t o 5-bit positive control GaAs IC digital attenuators with N Included in the HMC-DK004 Designer’s Kit Functional Diagram CMOS compatible serial-to-parallel drivers packaged in leadless QFN 4x4 mm SMT packages. Covering 0.7 to 3.8 GHz, the insertion loss is typically less than 1.5 to 2 dB. The attenuator bit values are 0.5 (LSB), 1, 2, 4, and 8 dB for a total attenuation of 15.5 dB. Attenuation accuracy is excellent at ±0.25 dB typical with an IIP3 of up to +52 dBm. Five bit serial control words are used to select each attenuation state. A single Vcc bias of +3V to +5V applied through an external 5k Ohm resistor is required. Electrical Specifi cations, TA = +25° C, Vcc = +3V to +5V Parameter Typical Max. Units Insertion Loss 0.7 - 1.4 GHz 1.4 - 2.3 GHz 2.3 - 2.7 GHz 2.7 - 3.8 GHz Frequency 1.2 1.5 1.8 2.0 1.5 2.0 2.3 2.5 dB dB dB dB Attenuation Range 0.7 - 3.8 GHz 15.5 dB Return Loss (RF1 & RF2, All Atten. States) 0.7 - 1.4 GHz 1.4 - 2.3 GHz 2.3 - 2.7 GHz 2.7 - 3.8 GHz 17 18 19 15 dB dB dB dB 0.7 - 0.9 GHz 0.9 - 2.2 GHz 2.2 - 3.8 GHz ± (0.5 +5% of Atten. Setting) Max ± (0.3 +4% of Atten. Setting) Max ± (0.5 +5% of Atten. Setting) Max dB dB dB Attenuation Accuracy: (Referenced to Insertion Loss) All Attenuation States Input Power for 0.1 dB Compression Vcc = 5V Vcc = 3V 0.7 - 3.8 GHz 25 23 dBm dBm Input Third Order Intercept Point (Two-tone Input Power = 0 dBm Each Tone) Vcc = 5V Vcc = 3V 0.7 - 3.8 GHz 52 48 dBm dBm 0.7 - 3.8 GHz 750 830 ns ns Switching Characteristics tRISE, tFALL (10/90% RF) tON, tOFF (Latch Enable to 10/90% RF) 5-2 Min. 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 HMC305LP4 / 305LP4E v03.0809 D E U N I T N O T C C S U I D D O PR 0.5 dB LSB GaAs MMIC 5-BIT SERIAL CONTROL DIGITAL ATTENUATOR, 0.7 - 3.8 GHz 5 Return Loss RF1, RF2 Insertion Loss -1.5 -2 -2.5 -3 -3.5 -5 -10 0.5 dB 2 dB wD e N or f d de n e mm o c Re t o N +25C +85C -40C ns g i s e 8 dB -15 -20 I.L. 15.5 dB -25 1 dB -4 0.5 1 1.5 2 2.5 3 3.5 -30 0.5 4 1 1.5 Normalized Attenuation 2.5 3 3.5 4 Bit Error vs. Attenuation State (Only Major States are Shown) 0 1 -2 0.75 -6 -8 -10 -12 -14 -16 0.5 1.9 GHz 3.5 GHz -4 BIT ERROR (dB) NORMALIZED ATTENUATION (dB) 2 4 dB FREQUENCY (GHz) FREQUENCY (GHz) 0.25 0 -0.25 2.4 GHz 1 1.5 2 2.5 3 3.5 4 -0.5 0 2 4 6 8 10 Bit Error vs. Frequency Relative Phase vs. Frequency (Only Major States are Shown) (Only Major States are Shown) 12 14 1 60 2 RELATIVE PHASE (deg.) 3 0.5, 1, 2, 4 dB 8 dB 1 15.5 dB 0 40 15.5 dB 20 0 -20 0.5, 1, 2, 4, 8 dB -40 -1 0.5 0.9 GHz 0.5 FREQUENCY (GHz) BIT ERROR (dB) ATTENUATORS - DIGITAL - SMT INSERTION LOSS (dB) -1 0 RETURN LOSS (dB) 0 -0.5 (Only Major States are Shown) -60 1 1.5 2 2.5 FREQUENCY (GHz) 3 3.5 4 0 0.5 1 1.5 2 2.5 3 3.5 4 FREQUENCY (GHz) Note: All Data Typical Over Voltage (+3V to +5V) & Temperature (-40 to +85 deg. C.). 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 5-3 HMC305LP4 / 305LP4E v03.0809 D E U N I T N O T C C S U I D D O PR 0.5 dB LSB GaAs MMIC 5-BIT SERIAL CONTROL DIGITAL ATTENUATOR, 0.7 - 3.8 GHz 5 Worst Case Step Error Between Successive Attenuation States 0.8 STEP ERROR (dB) ATTENUATORS - DIGITAL - SMT 1.2 0.4 Digital Control Voltages State Vcc = +5V Low 0 to 1.3V Vcc = +3V 0 to 0.7V High 3.5 to 5V 2.3 to 3V ns g i s De Serial Input Truth Table 0 Latch Enable -0.4 -0.8 -1.2 0.5 1 1.5 2 2.5 Shift Clock ew N r fo d e end m com e R Not 3 3.5 4 Reset X X L Shift register cleared X H Shift register clocked X H Contents of shift register transferred to Digital Attenuator FREQUENCY (GHz) Timing Function Truth Table Symbol Vcc = +5V Vcc = +3V Serial Control Input Units Parameter Min. Max. Min. Max. Serial Input Setup Time ts 20 - 100 - ns Hold time from Serial Input to Shift Clock th 0 - 5 - ns Setup time from Shift Clock to Latch Enable tlsup 40 - 100 - ns Propagation delay, Latch Enable to C0.5 through C8 tpd Setup time from Reset to Shift Clock - 20 - 50 - ns fclk - 30 - 10 MHz Clock Frequency (1/tclk) - 30 - 70 Attenuation Setting RF1 - RF2 C 0.5 C1 C2 C4 C8 High High High High High Reference I.L. Low High High High High 0.5 dB High Low High High High 1 dB High High Low High High 2 dB High High High Low High 4 dB High High High High Low 8 dB Low Low Low Low Low 15.5 dB Max. Atten. ns Any combination of the above states will provide an attenuation approximately equal to the sum of the bits selected. Timing Diagram 5-4 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 HMC305LP4 / 305LP4E v03.0809 D E U N I T N O T C C S U I D D O PR 0.5 dB LSB GaAs MMIC 5-BIT SERIAL CONTROL DIGITAL ATTENUATOR, 0.7 - 3.8 GHz ew N r fo d e end m com e R Not ns g i s De 5 ATTENUATORS - DIGITAL - SMT Logic / Functional Diagram Programming Example to Select 0.5 dB Attenuation State 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 5-5 HMC305LP4 / 305LP4E v03.0809 D E U N I T N O T C C S U I D D O PR 0.5 dB LSB GaAs MMIC 5-BIT SERIAL CONTROL DIGITAL ATTENUATOR, 0.7 - 3.8 GHz ATTENUATORS - DIGITAL - SMT 5 5-6 Pin Descriptions Pin Number Function Description 1, 3, 4, 6, 10, 12, 13, 15, 16, 18 N/C These pins should be connected to PCB RF ground to maximize performance. 2, 17 RF1, RF2 This pin is DC coupled and matched to 50 Ohms Blocking capacitors are required. Select value based on lowest frequency of operation. 5 Serial Output 7 Reset 8 Shift Clock 9 Latch Enable ew N r fo d e end m com e R Not Interface Schematic ns g i s De Serial data output. Serial input data delayed by 8 clock cycles See truth table, control voltage table and timing diagram. 11 Serial Input 14 Vcc Supply Voltage. 19 - 24 GND Package bottom has an exposed metal paddle that must also be connected to RF/DC Ground. 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 HMC305LP4 / 305LP4E v03.0809 D E U N I T N O T C C S U I D D O PR 0.5 dB LSB GaAs MMIC 5-BIT SERIAL CONTROL DIGITAL ATTENUATOR, 0.7 - 3.8 GHz ew N r fo d e end m com e R Not ns g i s De 5 ATTENUATORS - DIGITAL - SMT Application Circuit DC blocking capacitors C1 & C2 are required on RF1 & RF2. Choose C1 = C2 = 100 ~ 300 pF to allow lowest customer specific frequency to pass with minimal loss. R1 = 5k Ohm is required to supply voltage to the circuit through either PIN 2 or PIN 17. 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 5-7 HMC305LP4 / 305LP4E v03.0809 D E U N I T N O T C C S U I D D O PR 0.5 dB LSB GaAs MMIC 5-BIT SERIAL CONTROL DIGITAL ATTENUATOR, 0.7 - 3.8 GHz ATTENUATORS - DIGITAL - SMT 5 Absolute Maximum Ratings Digital Inputs (Reset, Shift Clock, Latch Enable & Serial Input) -1.5 to (Vcc + 1.5) V Digital Outputs (Serial Output) -0.5 to (Vcc + 0.5) V DC Current on Serial Output ±35 mA Bias Voltage (Vcc) +7V Storage Temperature -65 to +150 °C ELECTROSTATIC SENSITIVE DEVICE OBSERVE HANDLING PRECAUTIONS ew N r fo d e end m com e R Not Operating Temperature ns g i s De -40 to +85 °C RF Input Power (0.7 - 3.8 GHz) +26 dBm ESD Sensitivity (HBM) Class 1A 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 HMC305LP4 Low Stress Injection Molded Plastic Sn/Pb Solder MSL1 HMC305LP4E RoHS-compliant Low Stress Injection Molded Plastic 100% matte Sn MSL1 Package Marking [3] [1] H305 XXXX [2] H305 XXXX [1] Max peak reflow temperature of 235 °C [2] Max peak reflow temperature of 260 °C [3] 4-Digit lot number XXXX 5-8 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 HMC305LP4 / 305LP4E v03.0809 D E U N I T N O T C C S U I D D O PR 0.5 dB LSB GaAs MMIC 5-BIT SERIAL CONTROL DIGITAL ATTENUATOR, 0.7 - 3.8 GHz ew N r fo d e end m com e R Not ns g i s De 5 ATTENUATORS - DIGITAL - SMT Evaluation Circuit Board List of Materials for Evaluation PCB 108782 [1] Item Description J1 - J2 PCB Mount SMA Connector J3 2 mm Molex Header C1, C2 100 pF Capacitor, 0402 Pkg. C3 0.01 μF Capacitor, 0402 Pkg. R1 5k Ohm Resistor, 0402 Pkg. U1 HMC305LP4 / HMC305LP4E Digital Attenuator PCB [2] 108780 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 ground paddle should be connected directly to the ground plane similar to that shown below. A sufficient number of via holes should be used to connect the top and bottom ground planes. The evaluation circuit board as shown is available from Hittite Microwave Corporation 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 5-9