271LP4E

HMC271LP4 / 271LP4E v03.0809 5 ATTENUATORS - DIGITAL - SMT Typical Applications • Cellular/3G Infrastructure The HMC271LP4 / HMC271LP4E is ideal for: • Fixed Wireless, WiMax & WiBro • Test Instrumentation Functional Diagram ED U IN NT T O SC DUC DI RO P Features 1 dB LSB Steps to 31 dB CMOS Compatible Serial Data Interface SPI Compatible Serial Output ±0.4 dB Typical Bit Error 24 Lead 4x4mm QFN Package: 16mm2 1 dB LSB GaAs MMIC 5-BIT SERIAL CONTROL DIGITAL ATTENUATOR, 0.7 - 3.7 GHz w r Ne o ed f Description d General men om The HMC271LP4 & HMC271LP4E are broadband Rec 5-bit positive control GaAs IC digital attenuators with t No CMOS compatible serial-to-parallel drivers in low Included in the HMC-DK004 Designer’s Kit cost leadless QFN 4x4 mm SMT packages. Covering 0.7 to 3.7 GHz, the insertion loss is typically less than 2.5 dB. The attenuator bit values are 1 (LSB), 2, 4, 8, and 16 dB for a total attenuation of 31 dB. Accuracy is excellent at ± 0.4 dB typical with an IIP3 of up to +48 dBm. Five bit CMOS compatible 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. s sign De Electrical Specifi cations, TA = +25° C, Vcc = +3V to +5V Parameter Frequency 0.7 - 1.4 GHz 1.4 - 2.3 GHz 2.3 - 2.7 GHz 2.7 - 3.7 GHz 0.7 - 3.7 GHz 0.7 - 1.4 GHz 1.4 - 2.7 GHz 2.7 - 3.7 GHz 0.7 - 0.9 GHz 0.9 - 2.2 GHz 2.2 - 3.7 GHz Vcc = 5V Vcc = 3V Vcc = 5V Vcc = 3V 0.7 - 3.7 GHz 0.7 - 3.7 GHz Min. Typical 1.9 2.3 2.6 2.8 31 12 15 16 ± (0.4 + 5% of Atten. Setting) Max ± (0.4 + 4% of Atten. Setting) Max ± (0.4 + 5% of Atten. Setting) Max 24 22 48 46 Max. 2.4 2.8 3.1 3.3 Units dB dB dB dB dB dB 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) All Attenuation States 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 (Latch Enable to 10/90% RF) 0.7 - 3.7 GHz 750 830 ns ns 5-1 F or 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 HMC271LP4 / 271LP4E v03.0809 Insertion Loss 0 -0.5 INSERTION LOSS (dB) -1 -1.5 -2 -2.5 -3 -3.5 -4 0.5 RETURN LOSS (dB) +25C +85C -40C -5 16 dB 4 dB 8 dB 31 dB -10 -15 -20 -25 -30 1 1.5 2 2.5 FREQUENCY (GHz) w r Ne o ed f d men om Rec Not 2 dB 3 3.5 4 0.5 1 1.5 2 1.5 0.9 GHz BIT ERROR (dB) 1 0.5 0 -0.5 s sign De I.L. 2.5 3 1 dB 2 3.5 4 FREQUENCY (GHz) Normalized Attenuation (Only Major States are Shown) 0 NORMALIZED ATTENUATION (dB) -5 -10 -15 -20 -25 -30 -35 0.5 Bit Error vs. Attenuation State 1.9 GHz 2.4 GHz 3.5 GHz -1 1 1.5 2 2.5 3 3.5 4 0 4 8 12 16 20 24 28 32 FREQUENCY (GHz) ATTENUATION STATE (dB) Bit Error vs. Frequency (Only Major States are Shown) 4 Relative Phase vs. Frequency (Only Major States are Shown) 100 75 3 BIT ERROR (dB) 16 dB 2 8 dB 1, 2, 4 dB RELATIVE PHASE (deg.) 50 31 dB 25 0 -25 -50 -75 1, 2, 4, 8 dB 16 dB 1 31 dB 0 -1 0.5 -100 1 1.5 2 2.5 3 3.5 4 0 0.5 1 1.5 2 2.5 3 3.5 4 FREQUENCY (GHz) FREQUENCY (GHz) Note: All Data Typical Over Voltage (+3V to +5V) & Temperature (-40 to +85 deg. C.). F or 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 5-2 ATTENUATORS - DIGITAL - SMT ED U IN NT T O SC DUC DI RO P Return Loss RF1, RF2 0 1 dB LSB GaAs MMIC 5-BIT SERIAL CONTROL DIGITAL ATTENUATOR, 0.7 - 3.7 GHz (Only Major States are Shown) 5 HMC271LP4 / 271LP4E v03.0809 5 ATTENUATORS - DIGITAL - SMT Worst Case Step Error Between Successive Attenuation States 1.2 0.8 STEP ERROR (dB) 0.4 0 -0.4 -0.8 -1.2 0.5 1 ED U IN NT T O SC DUC DI RO P Digital Control Voltages State Low Vcc = +5V 0 to 1.3V Vcc = +3V 0 to 0.7V High 3.5 to 5V 2.3 to 3V 1 dB LSB GaAs MMIC 5-BIT SERIAL CONTROL DIGITAL ATTENUATOR, 0.7 - 3.7 GHz Serial Input Truth Table Latch Enable X X Shift Clock X Reset L 1.5 2 2.5 FREQUENCY (GHz) Timing Symbol Parameter Min. Serial Input Setup Time Hold time from Serial Input to Shift Clock Setup time from Shift Clock to Latch Enable Propagation delay, Latch Enable to C1 through C16 Setup time from Reset to Shift Clock Clock Frequency (1/tclk) ts th 20 0 w r Ne o ed f d men om Rec Not Truth Table  X H H 3 3.5 4 s sign De Function Shift register cleared Shift register clocked  Contents of shift register transferred to Digital Attenuator Vcc = +5V Max. - Vcc = +3V Min. 100 5 Max. - Units C1 ns ns High Low High C2 Serial Data Input C4 High High High Low High High Low C8 High High High High Low High Low C16 High High High High High Low Low Attenuation Setting RF1 - RF2 Reference I.L. 1 dB 2 dB 4 dB 8 dB 16 dB 31 dB Max. Atten. High High Low High High High Low tlsup 40 - 100 - ns High High High tpd - 30 - 70 ns Low fclk 20 - 30 50 - 10 ns MHz Any combination of the above states will provide an attenuation approximately equal to the sum of the bits selected. Timing Diagram 5-3 F or 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 HMC271LP4 / 271LP4E v03.0809 Logic / Functional Diagram w r Ne o ed f d men om Rec Not s sign De Programming Example to Select 1 dB Attenuation State F or 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 5-4 ATTENUATORS - DIGITAL - SMT ED U IN NT T O SC DUC DI RO P 1 dB LSB GaAs MMIC 5-BIT SERIAL CONTROL DIGITAL ATTENUATOR, 0.7 - 3.7 GHz 5 HMC271LP4 / 271LP4E v03.0809 5 ATTENUATORS - DIGITAL - SMT Pin Descriptions Pin Number 1, 3, 4, 6, 10, 12, 13, 15, 16, 18 2, 17 ED U IN NT T O SC DUC DI RO P Function N/C Description These pins should be connected to PCB RF ground to maximize performance. RF1, RF2 Serial Output 1 dB LSB GaAs MMIC 5-BIT SERIAL CONTROL DIGITAL ATTENUATOR, 0.7 - 3.7 GHz Interface Schematic 5 w r Ne o ed f d men om Rec Not Serial data output. Serial input data delayed by 8 clock cycles. This pin is DC coupled and matched to 50 Ohms Blocking capacitors are required. Select value based on lowest frequency of operation. s sign De 7 8 9 Reset Shift Clock Latch Enable See truth table, control voltage table and timing diagram. 11 Serial Input 14 Vcc Supply Voltage. Package bottom has an exposed metal paddle that must also be connected to RF/DC Ground. 19 - 24 GND 5-5 F or 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 HMC271LP4 / 271LP4E v03.0809 Application Circuit w r Ne o ed f d men om Rec Not s sign De DC blocking capacitors C1 & C2 are required on RF1 & RF2. Choose C1 = C2 = 100 ~ 300 pF to allow lowest customer specifi c frequency to pass with minimal loss. R1 = 5k Ohm is required to supply voltage to the circuit through either PIN 2 or PIN 17. F or 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 5-6 ATTENUATORS - DIGITAL - SMT ED U IN NT T O SC DUC DI RO P 1 dB LSB GaAs MMIC 5-BIT SERIAL CONTROL DIGITAL ATTENUATOR, 0.7 - 3.7 GHz 5 HMC271LP4 / 271LP4E v03.0809 5 ATTENUATORS - DIGITAL - SMT Absolute Maximum Ratings Digital Inputs (Reset, Shift Clock, Latch Enable & Serial Input) Digital Outputs (Serial Output) DC Current on Serial Output Bias Voltage (Vcc) Storage Temperature Operating Temperature RF Input Power (0.7 - 3.7 GHz) ESD Sensitivity (HBM) ED U IN NT T O SC DUC DI RO P -1.5 to (Vcc + 1.5) V -0.5 to (Vcc + 0.5) V ±35 mA +7V 1 dB LSB GaAs MMIC 5-BIT SERIAL CONTROL DIGITAL ATTENUATOR, 0.7 - 3.7 GHz ELECTROSTATIC SENSITIVE DEVICE OBSERVE HANDLING PRECAUTIONS Outline Drawing w r Ne o ed f d men om Rec Not -40 to +85 °C +26 dBm Class 1A -65 to +150 °C s sign De 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 HMC271LP4 HMC271LP4E Package Body Material Low Stress Injection Molded Plastic RoHS-compliant Low Stress Injection Molded Plastic Lead Finish Sn/Pb Solder 100% matte Sn MSL Rating MSL1 MSL1 [1] Package Marking [3] H271 XXXX H271 XXXX [2] [1] Max peak reflow temperature of 235 °C [2] Max peak reflow temperature of 260 °C [3] 4-Digit lot number XXXX 5-7 F or 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 HMC271LP4 / 271LP4E v03.0809 Evaluation Circuit Board w r Ne o ed f d men om Rec Not s sign De List of Materials for Evaluation PCB 108782 [1] Item J1 - J2 J3 C1, C2 C3 R1 U1 PCB [2] Description PCB Mount SMA Connector 2 mm Molex Header 100 pF Capacitor, 0402 Pkg. 0.01 μF Capacitor, 0402 Pkg. 5k Ohm Resistor, 0402 Pkg. HMC271LP4(E) Digital Attenuator 108780 Evaluation PCB [1] Reference this number when ordering complete evaluation PCB [2] Circuit Board Material: Rogers 4350 The circuit board used in the 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. F or 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 5-8 ATTENUATORS - DIGITAL - SMT ED U IN NT T O SC DUC DI RO P 1 dB LSB GaAs MMIC 5-BIT SERIAL CONTROL DIGITAL ATTENUATOR, 0.7 - 3.7 GHz 5