HMC540LP3 / 540LP3E v00.0605 1 dB LSB GaAs MMIC 4-BIT DIGITAL POSITIVE CONTROL ATTENUATOR, DC - 5.5 GHz ATTENUATORS - SMT 5 Typical Applications Features The HMC540LP3 / HMC540LP3E is ideal for both RF 1 dB LSB Steps to 15 dB and IF applications: ± 0.2 dB Typical Step Error • Cellular Infrastructure Low Insertion Loss: 1 dB • ISM, MMDS, WLAN, WiMAX, WiBro High IP3: +50 dBm • Microwave Radio & VSAT Single Control Line Per Bit TTL/CMOS Compatible Control • Test Equipment and Sensors Single +5V Supply Functional Diagram 3x3 mm SMT Package General Discription The HMC540LP3 & HMC540LP3E are broadband 4-bit GaAs IC digital attenuators in low cost leadless surface mount packages. This single positive control line per bit digital attenuator utilizes off chip AC ground capacitors for near DC operation, making it suitable for a wide variety of RF and IF applications. Covering DC to 5.5 GHz, the insertion loss is less than 1 dB typical. The attenuator bit values are 1 (LSB), 2, 4 and 8 dB for a total attenuation of 15 dB. Attenuation accuracy is excellent at ± 0.2 dB typical step error. The attenuator also features a IIP3 of +50 dBm. Four 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 - 2.0 GHz 2.0 - 3.0 GHz 3.0 - 4.0 GHz 4.0 -5.5 GHz 0.8 1.0 1.3 2.2 1.1 1.3 1.6 2.6 dB dB dB dB Attenuation Range DC - 5.5 GHz 15 dB Return Loss (RF1 & RF2, All Atten. States) DC - 3.5 GHz 3.5 - 5.5 GHz 20 15 dB dB Attenuation Accuracy: (Referenced to Insertion Loss) Frequency (GHz) All States Input Power for 0.1 dB Compression Input Third Order Intercept Point (Two-Tone Input Power= 0 dBm Each Tone) REF - 4 dB States 5 - 15 dB States DC - 1.0 GHz 1.0 - 4.0 GHz 4.0 - 5.0 GHz 5.0 - 5.5 GHz Min. ± (0.2 + 2% of Atten. Setting) Max. ± (0.2 + 3% of Atten. Setting) Max. ± (0.3 + 5% of Atten. Setting) Max. ± (0.4 + 8% of Atten. Setting) Max. dB dB dB dB 0.1 - 5.5 GHz 27 dBm 0.1 - 5.5 GHz 50 45 dBm dBm 95 100 ns ns Switching Characteristics DC -5.5 GHz tRISE, tFALL (10/90% RF) tON, tOFF (50% CTL to 10/90% RF) 5 - 170 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 HMC540LP3 / 540LP3E v00.0605 1 dB LSB GaAs MMIC 4-BIT DIGITAL POSITIVE CONTROL ATTENUATOR, DC - 5.5 GHz 5 Return Loss RF1, RF2 (Only Major States are Shown) Insertion Loss RETURN LOSS (dB) INSERTION LOSS (dB) -0.5 -1 -1.5 +25 C +85 C -40 C -2 -10 I.L.dB 1 dB 2 dB 4 dB 8 dB 15 dB -20 -30 -2.5 -3 -40 0 1 2 3 4 5 0 6 1 2 FREQUENCY (GHz) 3 4 5 6 FREQUENCY (GHz) Normalized Attenuation (Only Major States are Shown) Bit Error vs. Attenuation State 2 1.5 -4 BIT ERROR (dB) NORMALIZED ATTENUATION (dB) 0 ATTENUATORS - SMT 0 0 -8 -12 -16 5.5 GHz 5 GHz 1 0.5 4 GHz 0 -0.5 1 GHz -20 100 MHz -1 0 1 2 3 4 5 6 0 4 FREQUENCY (GHz) 8 12 16 ATTENUATION STATE (dB) Bit Error vs. Frequency Relative Phase vs. Frequency (Only Major States are Shown) (Only Major States are Shown) 1.5 40 30 0.5 RELATIVE PHASE (deg) BIT ERROR (dB) 1 1-4 dB 0 -0.5 15 dB 20 8 dB 10 0 -10 1-4 dB -20 -30 15 dB 8 dB -40 -1 0 1 2 3 4 FREQUENCY (GHz) 5 6 0 1 2 3 4 5 6 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 - 171 HMC540LP3 / 540LP3E v00.0605 1 dB LSB GaAs MMIC 4-BIT DIGITAL POSITIVE CONTROL ATTENUATOR, DC - 5.5 GHz 5 Worst Case Step Error Between Successive Attenuation States 0.3 0.2 STEP ERROR (dB) ATTENUATORS - SMT 0.4 0.1 0 -0.1 -0.2 -0.3 -0.4 -0.5 0 1 2 3 4 5 6 FREQUENCY (GHz) Bias Voltage & Current Truth Table Vdd = +5.0 Vdc ± 10% Vdd (VDC) Control Voltage Input Idd (Typ.) (mA) +4.5 3.0 +5.0 3.2 +5.5 3.4 Control Voltage State Bias Condition Low 0 to +0.8V @ -5 uA Typ. High +2.0 to + 5.0 Vdc @ 40 uA Typ. V2 4 dB V3 2 dB V4 1 dB High High High High High High High Low 1 dB High High Low High 2 dB Reference I.L. High Low High High 4 dB Low High High High 8 dB Low Low Low Low 15 dB Any combination of the above states will provide an attenuation approximately equal to the sum of the bits selected. Note: Vdd = +5V 5 - 172 Attenuation State RF1 - RF2 V1 8 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 HMC540LP3 / 540LP3E v00.0605 1 dB LSB GaAs MMIC 4-BIT DIGITAL POSITIVE CONTROL ATTENUATOR, DC - 5.5 GHz RF Input Power (DC - 5.5 GHz) +29 dBm (T = +85 °C) Control Voltage Range (V1 to V4) -1V to Vdd +1V Bias Voltage (Vdd) +7.0 Vdc Channel Temperature 150 °C Continuous Pdiss (T = 85 °C) (derate 11.7 mW/°C above 85 °C) 0.769 W Thermal Resistance 85 °C/W Storage Temperature -65 to +150 °C Operating Temperature -40 to +85 °C ELECTROSTATIC SENSITIVE DEVICE OBSERVE HANDLING PRECAUTIONS Outline Drawing ATTENUATORS - SMT 5 Absolute Maximum Ratings 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 HMC540LP3 Low Stress Injection Molded Plastic Sn/Pb Solder MSL1 HMC540LP3E RoHS-compliant Low Stress Injection Molded Plastic 100% matte Sn MSL1 Package Marking [3] [1] 540 XXXX [2] 540 XXXX [1] Max peak reflow temperature of 235 °C [2] Max peak reflow temperature of 260 °C [3] 4-Digit lot number XXXX 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 - 173 HMC540LP3 / 540LP3E v00.0605 1 dB LSB GaAs MMIC 4-BIT DIGITAL POSITIVE CONTROL ATTENUATOR, DC - 5.5 GHz ATTENUATORS - SMT 5 Pin Descriptions Pin Number Function Description 1 Vdd Supply Voltage. 2, 11 RF1, RF2 This pin is DC coupled and matched to 50 Ohm. Blocking capacitors are required. Select value based on lowest frequency of operation. 3, 7, 9, 10, 12 N/C These pins should be connected to PCB RF ground to maximize performance. 4 - 6, 8 ACG1 - ACG4 External capacitor to ground is required. Select value for lowest frequency of operation. Place capacitor as close to pins as possible. 13 - 16 V1 - V4 See truth table and control voltage table. GND Package bottom has an exposed metal paddle that must be connected to RF/DC Ground. Interface Schematic Application Circuit Recommended Component Values 5 - 174 C1 - C3 1,000 pF ± 10% C4, C5 330 pF ± 10% 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 HMC540LP3 / 540LP3E v00.0605 1 dB LSB GaAs MMIC 4-BIT DIGITAL POSITIVE CONTROL ATTENUATOR, DC - 5.5 GHz 5 ATTENUATORS - SMT Evaluation PCB List of Materials for Evaluation PCB 111315 [1] Item Description J1 - J2 PCB Mount SMA Connector J3 - J8 DC Pin C1 - C3 1000 pF Capacitor, 0402 Pkg. C4, C5 330 pF Capacitor, 0402 Pkg. U1 HMC540LP3 / HMC540LP3E Digital Attenuator PCB [2] 111291 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 5 - 175