HMC542LP4 / 542LP4E v03.0809 0.5 dB LSB GaAs MMIC 6-BIT DIGITAL SERIAL CONTROL ATTENUATOR, DC - 3 GHz ATTENUATORS - DIGITAL - SMT 5 Typical Applications Features The HMC542LP4(E) is ideal for: 0.5 dB LSB Steps to 31.5 dB • Cellular/PCS/3G Infrastructure TTL/CMOS Compatible Serial Data Interface • ISM, MMDS, WLAN, WiMAX, & WiBro SPI Compatible Serial Output • Microwave Radio & VSAT ± 0.25 dB Typical Step Error • Test Equipment and Sensors 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 Typ. Max. Units DC - 1.5 GHz 1.5 - 3.0 GHz 1.2 1.5 1.5 1.8 dB dB Attenuation Range DC - 3 GHz 31.5 dB Return Loss (RF1 & RF2, All Atten. States) DC - 3 GHz 17 dB Attenuation Accuracy: (Referenced to Insertion Loss) All Attenuation States 0.5 - 3.5 dB States 4.0 - 31.5 dB States All Attenuation States DC - 1.0 GHz 1.0 - 2.2 GHz 1.0 - 2.2 GHz 2.2 - 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. dB dB dB dB Input Power for 0.1 dB Compression 0.1 - 3.0 GHz 20 dBm Input Third Order Intercept Point (Two-Tone Input Power= 0 dBm Each Tone) 0.1 - 1.5 GHz 1.5 - 3.0 GHz 35 45 dBm dBm 800 900 ns ns Insertion Loss Frequency (GHz) Min. Switching Characteristics DC - 3 GHz tRISE, tFALL (10/90% RF) tON, tOFF (50% CTL to 10/90% RF) 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 5 Return Loss RF1, RF2 (Only Major States are Shown) Insertion Loss -5 RETURN LOSS (dB) INSERTION LOSS (dB) -0.5 -1 -1.5 -2 +25 C +85 C -40 C -2.5 -10 0.5-16 dB -15 -20 -25 -30 31.5 dB -35 -40 -3 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 0.4 500 MHz 3 GHz 40 MHz 1 GHz 0.2 0 -0.2 -0.4 -0.6 -30 -0.8 -35 100 MHz 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 ATTENUATION STATE (dB) Bit Error vs. Frequency Relative Phase vs. Frequency (Only Major States are Shown) (Only Major States are Shown) 80 2 1.5 0.5-8B RELATIVE PHASE (deg) 60 1 BIT ERROR (dB) ATTENUATORS - DIGITAL - SMT 0 0 31.5 dB 0.5 0 -0.5 -1 16 dB 40 31.5 dB 16 dB 20 8 dB 0 -20 -1.5 0.5-4 dB -40 -2 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 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 5 - 199 HMC542LP4 / 542LP4E v03.0809 0.5 dB LSB GaAs MMIC 6-BIT DIGITAL SERIAL CONTROL ATTENUATOR, DC - 3 GHz 5 Worst Case Step Error Between Successive Attenuation States Digital Control Voltages State 0.6 STEP ERROR (dB) ATTENUATORS - DIGITAL - SMT 1 Vcc = +5V 0.8 0.4 0.2 Low 0 to 1.3V High 3.5 to 5V Serial Input Truth Table 0 -0.2 -0.4 Latch Enable Shift Clock -0.6 X X L Shift register cleared -0.8 X H Shift register clocked X H Contents of shift register transferred to Digital Attenuator Reset -1 0 0.5 1 1.5 2 2.5 3 3.5 4 FREQUENCY (GHz) Timing Function Truth Table Symbol Vcc = +5V Min. Max. Control Voltage Input Units Parameter C16 C8 C4 C2 C1 C0.5 High Reference I.L. Serial Input Setup Time ts 20 - ns High High High High High Hold time from Serial Input to Shift Clock th 0 - ns 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 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) tlsup tpd fclk 40 - 20 - - 30 30 ns ns ns MHz 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. 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 5 ATTENUATORS - DIGITAL - SMT Logic / Functional Diagram 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 ATTENUATORS - DIGITAL - SMT 5 Pin Descriptions Pin Number Function Description 1, 3, 5, 14, 16-18, 23 N/C The pins are not connected internally; however, all data shown herein was measured with these pins connected to RF/DC ground externally. 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. 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. 12 N/C This pin is not connected internally and any connection made to it externally will have no effect on product performance. 19 Serial Output Serial data output. Serial input data delayed by 8 clock cycles 20 Reset 21 Shift Clock 22 Latch Enable Interface Schematic See truth table, control voltage table and timing diagram. 24 Serial Input GND 5 - 202 Package bottom has an exposed metal paddle that must 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 HMC542LP4 / 542LP4E v03.0809 0.5 dB LSB GaAs MMIC 6-BIT DIGITAL SERIAL CONTROL ATTENUATOR, DC - 3 GHz 5 ATTENUATORS - DIGITAL - SMT Application Circuit 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 ATTENUATORS - DIGITAL - SMT 5 Bias Voltage Absolute Maximum Ratings RF Input Power (DC - 3 GHz) +27 dBm (T = +85 °C) Digital Inputs (Reset, Shift Clock, Latch Enable & Serial Input) -1.5 to (Vcc +1.5) V Bias Voltage (Vcc) +7V 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 Vcc (V) Idd (Typ.) (mA) +4.5 4.7 +5.0 5.0 +5.5 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 Package Body Material Lead Finish MSL Rating HMC542LP4 Low Stress Injection Molded Plastic Sn/Pb Solder MSL1 HMC542LP4E RoHS-compliant Low Stress Injection Molded Plastic 100% matte Sn MSL1 Package Marking [3] [1] H542 XXXX [2] H542 XXXX [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 5 ATTENUATORS - DIGITAL - SMT Evaluation PCB List of Materials for Evaluation PCB 114399 [1] Item Description J1 - J2 PCB 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 HMC542LP4(E) Digital Attenuator PCB [2] 114398 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 or Arlon 25FR 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