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| HMC542LP4 / 542LP4E v03.0809 0.5 dB LSB GaAs MMIC 6-BIT DIGITAL SERIAL CONTROL ATTENUATOR, DC - 3 GHz 5 ATTENUATORS - DIGITAL - SMT Typical Applications The HMC542LP4(E) is ideal for: * Cellular/PCS/3G Infrastructure * ISM, MMDS, WLAN, WiMAX, & WiBro * Microwave Radio & VSAT * Test Equipment and Sensors Features 0.5 dB LSB Steps to 31.5 dB TTL/CMOS Compatible Serial Data Interface SPI Compatible Serial Output 0.25 dB Typical Step Error Single +5V Supply 24 Lead 4x4mm QFN Package: 16mm2 Functional Diagram General Description The HMC542LP4(E) is a broadband 6-bit GaAs IC digital attenuator with a CMOS compatible serial to parallel driver in low cost leadless surface mount package. This serial control digital attenuator incorp rates 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 GHz, the insertion loss is 1.5 dB and 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 0.25 dB typical step error with an IIP3 of +45 dBm. Six bit serial control words are used to select each attenuation state. A single Vdd bias of +5V is required. Electrical Specifi cations, TA = +25 C, with Vcc = +5V Parameter Insertion Loss Attenuation Range Return Loss (RF1 & RF2, All Atten. States) Attenuation Accuracy: (Referenced to Insertion Loss) All Attenuation States 0.5 - 3.5 dB States 4.0 - 31.5 dB States 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 DC - 3 GHz tRISE, tFALL (10/90% RF) tON, tOFF (50% CTL to 10/90% RF) 800 900 ns ns Frequency (GHz) DC - 1.5 GHz 1.5 - 3.0 GHz DC - 3 GHz DC - 3 GHz Min. Typ. 1.2 1.5 31.5 17 Max. 1.5 1.8 Units dB dB dB dB DC - 1.0 GHz 1.0 - 2.2 GHz 1.0 - 2.2 GHz 2.2 - 3.0 GHz 0.1 - 3.0 GHz 0.1 - 1.5 GHz 1.5 - 3.0 GHz (0.20 + 3% of Atten. Setting) Max. (0.25 + 3% of Atten. Setting) Max. (0.15 + 4% of Atten. Setting) Max. (0.30 + 3% of Atten. Setting) Max. 20 35 45 dB dB dB dB dBm dBm dBm 5 - 198 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 HMC542LP4 / 542LP4E v03.0809 0.5 dB LSB GaAs MMIC 6-BIT DIGITAL SERIAL CONTROL ATTENUATOR, DC - 3 GHz Return Loss RF1, RF2 Insertion Loss 0 -0.5 INSERTION LOSS (dB) RETURN LOSS (dB) -1 -1.5 -2 -2.5 -3 0 0.5 1 1.5 2 2.5 3 3.5 4 FREQUENCY (GHz) +25 C +85 C -40 C (Only Major States are Shown) 0 -5 -10 -15 -20 -25 -30 -35 -40 0 0.5 1 1.5 2 2.5 3 3.5 4 FREQUENCY (GHz) 31.5 dB 0.5-16 dB 5 ATTENUATORS - DIGITAL - SMT 5 - 199 Normalized Attenuation (Only Major States are Shown) 0 NORMALIZED ATTENUATION (dB) -5 Bit Error vs. Attenuation State 1 0.8 0.6 BIT ERROR (dB) -10 -15 -20 -25 -30 -35 0 0.5 1 1.5 2 2.5 3 3.5 4 FREQUENCY (GHz) 0.4 0.2 0 -0.2 -0.4 -0.6 -0.8 -1 0 4 40 MHz 3 GHz 1 GHz 500 MHz 2 GHz 100 MHz 8 12 16 20 24 28 32 ATTENUATION STATE (dB) Bit Error vs. Frequency (Only Major States are Shown) 2 1.5 1 BIT ERROR (dB) 0.5 0 -0.5 -1 16 dB 0.5-8B 31.5 dB Relative Phase vs. Frequency (Only Major States are Shown) 80 60 RELATIVE PHASE (deg) 40 20 0 -20 0.5-4 dB 31.5 dB 16 dB 8 dB -1.5 -2 0 0.5 1 1.5 2 2.5 3 3.5 4 FREQUENCY (GHz) -40 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 HMC542LP4 / 542LP4E v03.0809 0.5 dB LSB GaAs MMIC 6-BIT DIGITAL SERIAL CONTROL ATTENUATOR, DC - 3 GHz 5 ATTENUATORS - DIGITAL - SMT Worst Case Step Error Between Successive Attenuation States 1 0.8 0.6 STEP ERROR (dB) 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 Digital Control Voltages State Low High Vcc = +5V 0 to 1.3V 3.5 to 5V Serial Input Truth Table Latch Enable X X Shift Clock X X Reset L H H Function Shift register cleared Shift register clocked Contents of shift register transferred to Digital Attenuator 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 Latch Enable Window, Latch Enable to C0.5 through C8 Setup time from Reset to Shift Clock Clock Frequency (1/tclk) ts th tlsup 20 0 40 Max. ns ns ns Vcc = +5V Units Truth Table Control Voltage Input C16 High High High High High tpd 30 ns High Low fclk 20 30 ns MHz Low C8 High High High High High Low High Low C4 High High High High Low High High Low C2 High High High Low High High High Low C1 High High Low High High High High Low C0.5 High Low High High High High High Low Reference I.L. 0.5 dB 1 dB 2 dB 4 dB 8 dB 16 dB 31.5 dB Any combination of the above states will provide an attenuation approximately equal to the sum of the bits selected. Timing Diagram 5 - 200 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 HMC542LP4 / 542LP4E v03.0809 0.5 dB LSB GaAs MMIC 6-BIT DIGITAL SERIAL CONTROL ATTENUATOR, DC - 3 GHz Logic / Functional Diagram 5 ATTENUATORS - DIGITAL - SMT Programming Example to Select 16 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 - 201 HMC542LP4 / 542LP4E v03.0809 0.5 dB LSB GaAs MMIC 6-BIT DIGITAL SERIAL CONTROL ATTENUATOR, DC - 3 GHz 5 ATTENUATORS - DIGITAL - SMT Pin Descriptions Pin Number 1, 3, 5, 14, 16-18, 23 Function N/C Description The pins are not connected internally; however, all data shown herein was measured with these pins connected to RF/DC ground externally. Interface Schematic 2 Vcc Supply Voltage. 4, 15 RF1, RF2 This pin is DC coupled and matched to 50 Ohms Blocking capacitors are required. Select value based on lowest frequency of operation. External capacitor to ground is required. Select value for lowest frequency of operation. Place capacitor as close to pins as possible. This pin is not connected internally and any connection made to it externally will have no effect on product performance. 6 - 11, 13 ACG1 - ACG7 12 N/C 19 Serial Output Serial data output. Serial input data delayed by 8 clock cycles 20 21 22 Reset Shift Clock Latch Enable See truth table, control voltage table and timing diagram. 24 Serial Input GND Package bottom has an exposed metal paddle that must be connected to RF/DC Ground. 5 - 202 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 HMC542LP4 / 542LP4E v03.0809 0.5 dB LSB GaAs MMIC 6-BIT DIGITAL SERIAL CONTROL ATTENUATOR, DC - 3 GHz Application Circuit 5 ATTENUATORS - DIGITAL - SMT 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 - 203 HMC542LP4 / 542LP4E v03.0809 0.5 dB LSB GaAs MMIC 6-BIT DIGITAL SERIAL CONTROL ATTENUATOR, DC - 3 GHz 5 ATTENUATORS - DIGITAL - SMT Absolute Maximum Ratings RF Input Power (DC - 3 GHz) Digital Inputs (Reset, Shift Clock, Latch Enable & Serial Input) Bias Voltage (Vcc) Channel Temperature Continuous Pdiss (T = 85 C) (derate 7.7 mW/C above 85 C) Thermal Resistance Storage Temperature Operating Temperature +27 dBm (T = +85 C) -1.5 to (Vcc +1.5) V +7V 150 C 0.5 W 130 C/W -65 to +150 C -40 to +85 C Bias Voltage Vcc (V) +4.5 +5.0 +5.5 Idd (Typ.) (mA) 4.7 5.0 5.3 ELECTROSTATIC SENSITIVE DEVICE OBSERVE HANDLING PRECAUTIONS 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 HMC542LP4 HMC542LP4E 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] H542 XXXX H542 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 - 204 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 HMC542LP4 / 542LP4E v03.0809 0.5 dB LSB GaAs MMIC 6-BIT DIGITAL SERIAL CONTROL ATTENUATOR, DC - 3 GHz Evaluation PCB 5 ATTENUATORS - DIGITAL - SMT List of Materials for Evaluation PCB 114399 [1] Item J1 - J2 J3 C1 C2, C3 C4 - C7 U1 PCB [2] Description PCB Mount SMA Connector 14 Pin DC Connector 1000 pF Capacitor, 0603 Pkg. 1000 pF Capacitor, 0402 Pkg. 330 pF Capacitor, 0402 Pkg. HMC542LP4(E) Digital Attenuator 114398 Evaluation PCB [1] Reference this number when ordering complete evaluation PCB [2] Circuit Board Material: Rogers 4350 or Arlon 25FR 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. 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 - 205 |
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