HMC812LC4 v02.0911 Attenuators - ANALOG - SMT 8 GaAs MMIC VOLTAGE-VARIABLE ATTENUATOR, 5 - 30 GHz Typical Applications Features The HMC812LC4 is ideal for: Wide Bandwidth: 5 - 30 GHz • Point-to-Point Radio Excellent Linearity: +28 dBm Input IP3 • VSAT Radio High Power Handling: +25 dBm Input P1dB • Test Instrumentation Wide Attenuation Range: 30 dB • Microwave Sensors 24 Lead Ceramic 4x4 mm SMT Package: 16mm² • Military, ECM & Radar Functional Diagram General Description The HMC812LC4 is an absorptive Voltage Variable Attenuator (VVA) which operates from 5 - 30 GHz and is ideal in designs where an analog DC control signal must be used to control RF signal levels over a 30 dB amplitude range. It features two shunt-type attenuators which are controlled by two analog voltages, Vctrl1 and Vctrl2. Optimum linearity performance of the attenuator is achieved by first varying Vctrl1 of the 1st attenuation stage from -3V to 0V with Vctrl2 fixed at -3V. The control voltage of the 2nd attenuation stage, Vctrl2, should then be varied from -3V to 0V, with Vctrl1 fixed at 0V. The HMC812LC4 is housed in a RoHS compliant 4x4 mm QFN leadless ceramic package However, if the Vctrl1 and Vctrl2 pins are connected together it is possible to achieve the full analog attenuation range with only a small degradation in input IP3 performance. Applications include AGC circuits and temperature compensation of multiple gain stages in microwave point-to-point and VSAT radios. Electrical Specifications, TA = +25° C, 50 Ohm system Parameter Typ. Max. Units 2 3 4 dB dB dB Attenuation Range 30 dB dB Insertion Loss 8-1 Min. 5 - 16 GHz 16 - 24 GHz 24 - 30 GHz Input Return Loss 12 Output Return Loss 8 dB Input Power for 1 dB Compression (any attenuation) 25 dBm Input Third Order Intercept (Two-tone Input Power = 10 dBm Each Tone) 28 dBm For price, delivery and to place orders: Hittite Microwave Corporation, 20 Alpha Road, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373 Order On-line at www.hittite.com Application Support: Phone: 978-250-3343 or [email protected] HMC812LC4 v02.0911 GaAs MMIC VOLTAGE-VARIABLE ATTENUATOR, 5 - 30 GHz -5 -10 -10 -15 -3.0 V -1.8 V -1.4 V -0.8 V 0.0 V -20 -30 -3.0 V -2.0 V -1.6 V -1.0 V 0.0 V -40 -25 -50 2 6 10 14 18 22 26 30 2 6 10 FREQUENCY (GHz) Attenuation vs. Vctrl1 Over Temperature @ 10 GHz, Vctrl2 = -3V 18 22 26 30 Attenuation vs. Vctrl2 Over Temperature @ 10 GHz, Vctrl1 = 0V 0 0 -5 ATTENUATION (dB) -3 ATTENUATION (dB) 14 FREQUENCY (GHz) -6 -9 +25 C +85 C -40 C -12 +25 C +85 C -40 C -10 -15 -20 Attenuators - ANALOG - SMT 0 ATTENUATION (dB) ATTENUATION (dB) 0 -20 8 Attenuation vs. Frequency over Vctrl Vctrl1 = 0V, Vctrl2 = Variable Attenuation vs. Frequency over Vctrl Vctrl1 = Variable, Vctrl2 = -3V -25 -30 -15 -35 -3 -2.5 -2 -1.5 -1 -0.5 0 -3 -2.5 -2 Vctrl1 (V) -1.5 -1 -0.5 0 Vctrl2 (V) Attenuation vs. Pin @ 10 GHz Vctrl1 = Variable, Vctrl2 = -3V Input Return Loss Vctrl1 = Variable, Vctrl2 = -3V 0 0 RETURN LOSS (dB) ATTENUATION (dB) -3 -6 -9 -12 -3.0 V -1.8 V -1.4 V -15 -10 -20 -3.0 V -1.6 V 0.0 V -30 -0.8 V 0.0 V -18 -40 0 3 6 9 12 INPUT POWER (dBm) 15 18 2 6 10 14 18 22 26 30 FREQUENCY (GHz) For price, delivery and to place orders: Hittite Microwave Corporation, 20 Alpha Road, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373 Order On-line at www.hittite.com Application Support: Phone: 978-250-3343 or [email protected] 8-2 HMC812LC4 v02.0911 8 GaAs MMIC VOLTAGE-VARIABLE ATTENUATOR, 5 - 30 GHz Output Return Loss Vctrl1 = Variable, Vctrl2 = -3V Input Return Loss Vctrl1 = 0V, Vctrl2 = Variable RETURN LOSS (dB) RETURN LOSS (dB) 0 -10 -3.0 V -1.6 V 0.0 V -20 -30 6 10 14 18 22 26 -20 -3.0 V -1.6 V 0.0 V -30 30 2 6 10 FREQUENCY (GHz) 14 18 22 26 30 FREQUENCY (GHz) Output Return Loss Vctrl1 = 0V, Vctrl2 = Variable Input IP3 vs Input Power @ 10 GHz Vctrl1 = Variable, Vctrl2 = -3V 60 0 50 IP3 (dBm) -10 40 30 -20 -3.0 V -1.4 V 0.0 V -3.0 V -2.6 V -2.2 V -1.8 V 0.0 V 20 -30 10 2 6 10 14 18 22 26 0 30 3 6 9 12 15 18 FREQUENCY (GHz) SINGLE TONE INPUT POWER (dBm) Input IP3 vs. Input Power Over Frequency Vctrl1 = -2.2V, Vctrl2 = -3V (Worst Case IP3) Input IP3 vs. Input Power Over Temperature @ 10 GHz, Vctrl1 = -2.2V, Vctrl2 = -3V 30 30 IP3 (dBm) 35 IP3 (dBm) 35 5 GHz 10 GHz 20 GHz 30 GHz 25 +25 C +85 C -40 C 25 20 20 0 3 6 9 12 15 SINGLE TONE INPUT POWER (dBm) 8-3 -10 -40 2 RETURN LOSS (dB) Attenuators - ANALOG - SMT 0 18 0 3 6 9 12 15 18 SINGLE TONE INPUT POWER (dBm) For price, delivery and to place orders: Hittite Microwave Corporation, 20 Alpha Road, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373 Order On-line at www.hittite.com Application Support: Phone: 978-250-3343 or [email protected] HMC812LC4 v02.0911 GaAs MMIC VOLTAGE-VARIABLE ATTENUATOR, 5 - 30 GHz Attenuation vs. Vctrl over Temperature @ 10 GHz, Vctrl1 = Vctrl2 Attenuation vs. Frequency over Vctrl Vctrl1 = Vctrl2 0 ATTENUATION (dB) ATTENUATION (dB) -20 -30 -3.0 V -1.8 V -1.4 V -0.8 V 0.0 V -40 -50 -10 -20 +25 C +85 C -40 C -30 -40 2 6 10 14 18 22 26 -3 30 -2.5 -2 -1.5 -1 -0.5 0 CONTROL VOLTAGE (V) FREQUENCY (GHz) Attenuation vs. Input Power over Vctrl Vctrl1 = Vctrl2 Input Return Loss, Vctrl1 = Vctrl2 0 0 RETURN LOSS (dB) -10 -20 -30 -3.0 V -1.8 V -1.4 V -40 -0.8 V 0.0 V -50 -10 -20 -30 Attenuators - ANALOG - SMT 0 -10 ATTENUATION (dB) 8 -3.0 V -1.6 V 0.0 V -40 0 3 6 9 12 15 2 18 6 10 14 18 22 26 30 FREQUENCY (GHz) INPUT POWER (dBm) Input IP3 vs. Input Power Over Vctrl @ 10 GHz, Vctrl1 = Vctrl2 Output Return Loss, Vctrl1 = Vctrl2 0 60 -10 40 IP3 (dBm) RETURN LOSS (dB) 50 -20 30 20 -3.0 V -1.6 V 0.0 V -3.0 V -2.6 V -2.2 V -1.8 V 0.0 V 10 -30 0 2 6 10 14 18 FREQUENCY (GHz) 22 26 30 0 3 6 9 12 15 18 SINGLE TONE INPUT POWER (dBm) For price, delivery and to place orders: Hittite Microwave Corporation, 20 Alpha Road, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373 Order On-line at www.hittite.com Application Support: Phone: 978-250-3343 or [email protected] 8-4 HMC812LC4 v02.0911 Attenuators - ANALOG - SMT 8 Absolute Maximum Ratings GaAs MMIC VOLTAGE-VARIABLE ATTENUATOR, 5 - 30 GHz Control Voltages RF Input Power +30 dBm Vctrl1 -3 to 0V @ 10 µA Control Voltage Range +1 to -5V Vctrl2 -3 to 0V @ 10 µA Channel Temperature 150 °C Continuous Pdiss (T = 85 °C) (derate 16.4 mW/ °C above 85 °C) 1.07 W Thermal Resistance (Channel to ground paddle) 61 °C/W Storage Temperature -65 to +150 °C Operating Temperature -40 to +85 °C ELECTROSTATIC SENSITIVE DEVICE OBSERVE HANDLING PRECAUTIONS Outline Drawing NOTES: 1. PACKAGE BODY MATERIAL: ALUMINA. 2. LEAD AND GROUND PADDLE PLATING: GOLD FLASH OVER NICKEL. 3. DIMENSIONS ARE IN INCHES (MILLIMETERS). 4. LEAD SPACING TOLERANCE IS NON-CUMULATIVE. 5. PACKAGE WARP SHALL NOT EXCEED 0.05MM DATUM – C – 6. ALL GROUND LEADS AND GROUND PADDLE MUST BE SOLDERED TO PCB RF GROUND. 8-5 For price, delivery and to place orders: Hittite Microwave Corporation, 20 Alpha Road, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373 Order On-line at www.hittite.com Application Support: Phone: 978-250-3343 or [email protected] HMC812LC4 v02.0911 GaAs MMIC VOLTAGE-VARIABLE ATTENUATOR, 5 - 30 GHz Pin Number Function Description 1, 2, 6 - 8, 11 - 13, 17 - 24 N/C These pins are not connected internally, however these pins must be connected to RF/DC ground externally. 3, 5, 14, 16 GND These pins and the exposed ground paddle must be connected to RF/DC ground. 4 RFIN Interface Schematic This pad is DC coupled and matched to 50 Ohms. A blocking capacitor is required if RF line potential is not equal to 0V. 15 RFOUT 9 Vctrl1 Control Voltage 1 10 Vctrl2 Control Voltage 2 For price, delivery and to place orders: Hittite Microwave Corporation, 20 Alpha Road, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373 Order On-line at www.hittite.com Application Support: Phone: 978-250-3343 or [email protected] Attenuators - ANALOG - SMT 8 Pin Descriptions 8-6 HMC812LC4 v02.0911 Application Circuit Attenuators - ANALOG - SMT 8 GaAs MMIC VOLTAGE-VARIABLE ATTENUATOR, 5 - 30 GHz 8-7 For price, delivery and to place orders: Hittite Microwave Corporation, 20 Alpha Road, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373 Order On-line at www.hittite.com Application Support: Phone: 978-250-3343 or [email protected] HMC812LC4 v02.0911 GaAs MMIC VOLTAGE-VARIABLE ATTENUATOR, 5 - 30 GHz 8 Attenuators - ANALOG - SMT Evaluation PCB List of Materials for Evaluation PCB 123768 [1] Item Description J1, J2 2.9 mm PC Mount RF Connector J3, J4 DC Pin C1, C2 100 pF Capacitor, 0402 Pkg. C3, C4 1000 pF Capacitor, 0402 Pkg. C5, C6 4.7 µF Capacitor, CASE A U1 HMC812LC4 Analog VVA PCB [2] 123766 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: Arlon 25FR or Rogers 4350 For price, delivery and to place orders: Hittite Microwave Corporation, 20 Alpha Road, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373 Order On-line at www.hittite.com Application Support: Phone: 978-250-3343 or [email protected] 8-8