HMC473MS8 / 473MS8E v01.1105 GaAs MMIC VOLTAGE VARIABLE ATTENUATOR, 0.45 - 2.2 GHz ATTENUATORS - SMT 5 Typical Applications Features The HMC473MS8 / HMC473MS8E is ideal for: RoHS Compliant Product * Cellular, UMTS/3G Infrastructure Single Positive Voltage Control: 0 to +3V * Portable Wireless High Attenuation Range: 48 dB @ 0.9 GHz * GPS High P1dB Compression Point: +15 dBm Ultra Small Package: MSOP8 Replaces HMC173MS8 Functional Diagram General Description The HMC473MS8 & HMC473MS8E are general purpose absorptive voltage variable attenuators in 8-lead MSOP packages. The devices operate with a +3.3V supply voltage and a 0 to +3V control voltage. Unique features include a high dynamic attenuation range of up to 48 dB and excellent power handling performance through all attenuation states. The HMC473MS8 & HMC473MS8E are ideal for operation in wireless applications from 0.45 to 1.6 GHz. Operation from 1.7 to 2.2 GHz is possible with a reduced maximum attenuation of 29 to 32 dB. Improved control voltage linearity vs. attenuation can be achieved with an external driver circuit. Electrical Specifi cations, TA = +25 C, Vdd = +3.3 Vdc, 50 Ohm System Parameter 0.45 - 0.8 GHz 0.8 - 1.0 GHz 1.0 - 1.6 GHz 1.6 - 2.0 GHz 2.0 - 2.2 GHz Attenuation Range (Vctl = 0 to +3 V) 0.45 - 0.8 GHz 0.8 - 1.0 GHz 1.0 - 1.6 GHz 1.6 - 2.0 GHz 2.0 - 2.2 GHz Return Loss (Vctl = 0 to +3 V) Typ. Max. Units 1.8 1.9 2.4 2.8 3.0 2.2 2.3 2.9 3.3 3.5 dB dB dB dB dB 39 48 37 32 29 dB dB dB dB dB 0.45 - 0.8 GHz 0.8 - 1.0 GHz 1.0 - 1.6 GHz 1.6 - 2.0 GHz 2.0 - 2.2 GHz 15 14 11 10 9 dB dB dB Input Power for 0.1 dB Compression (0.9 GHz) Min Atten. Atten. >2.0 20 5.5 dBm dBm Input Power for 1.0 dB Compression (0.9 GHz) Min Atten. Atten. >2.0 28 15 dBm dBm Input Third Order Intercept (0.9 GHz, Two-tone Input Power = +5.0 dBm Each Tone) Min Atten. Atten. >2.0 47 20 dBm dBm 0.45 - 2.2 GHz 1.3 1.5 S S Switching Characteristics tRISE, tFALL (10/90% RF) tON, tOFF (50% CTL to 10/90% RF) 5 - 156 Min. Insertion Loss (Min. Atten.) (Vctl = 0.0 Vdc) 34 43 32 27 24 24 11 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 HMC473MS8 / 473MS8E v01.1105 GaAs MMIC VOLTAGE VARIABLE ATTENUATOR, 0.45 - 2.2 GHz 0 -1 -5 -2 -3 +25 C +85 C -40 C -10 -15 -20 -5 -25 0.4 0.6 0.8 1 1.2 1.4 1.6 FREQUENCY (GHz) 1.8 2 2.2 Input IP3 vs. Control Voltage @ 0.45 GHz 0.4 55 50 50 45 45 40 35 30 25 1 1.2 1.4 FREQUENCY (GHz) 1.6 1.8 2 35 30 +25 C +85 C -40 C 20 15 15 0 0.5 1 1.5 2 2.5 3 0 0.5 CONTROL VOLTAGE (V) 50 50 45 45 INPUT IP3 (dBm) 55 40 35 30 2 2.5 3 40 35 30 25 +25 C +85 C -40 C 20 1.5 Input IP3 vs. Control Voltage @ 2.1 GHz 55 25 1 CONTROL VOLTAGE (V) Input IP3 vs. Control Voltage @ 1.9 GHz INPUT IP3 (dBm) 0.8 40 25 +25 C +85 C -40 C 20 0.6 Input IP3 vs. Control Voltage @ 0.9 GHz 55 INPUT IP3 (dBm) INPUT IP3 (dBm) 0 V (WORSE CASE) 1.0 V 1.8 V 2.0 V 3.0 V ATTENUATORS - SMT 0 -4 5 Return Loss vs. Control Voltage RETURN LOSS (dB) INSERTION LOSS (dB) Insertion Loss vs. Temperature +25 C +85 C -40 C 20 15 15 0 0.5 1 1.5 2 CONTROL VOLTAGE (V) 2.5 3 0 0.5 1 1.5 2 2.5 3 CONTROL VOLTAGE (V) 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 - 157 HMC473MS8 / 473MS8E v01.1105 GaAs MMIC VOLTAGE VARIABLE ATTENUATOR, 0.45 - 2.2 GHz Relative Attenuation vs. Control Voltage @ 0.45 GHz Return Loss vs. Control Voltage @ 0.45 GHz 0 0 -9 -5 RETURN LOSS (dB) ATTENUATION (dB) ATTENUATORS - SMT 5 -18 +25 C +85 C -40 C -27 -36 +25 C +85 C -40 C -10 -15 -20 -45 -25 0 0.5 1 1.5 2 2.5 3 0 0.5 CONTROL VOLTAGE (V) Relative Attenuation vs. Control Voltage @ 0.9 GHz 1.5 2.5 3 2.5 3 2.5 3 0 -10 +25 C +85C -40 C RETURN LOSS (dB) -5 -20 +25 C +85 C -40 C -30 -40 -10 -15 -20 -50 -60 -25 0 0.5 1 1.5 2 2.5 3 0 0.5 CONTROL VOLTAGE (V) 1 1.5 2 CONTROL VOLTAGE (V) Relative Attenuation vs. Control Voltage @ 1.9 GHz Return Loss vs. Control Voltage @ 1.9 GHz 0 0 -5 +25 C +85 C -40 C RETURN LOSS (dB) -5 ATTENUATION (dB) 2 Return Loss vs. Control Voltage @ 0.9 GHz 0 ATTENUATION (dB) 1 CONTROL VOLTAGE (V) -10 -15 +25 C +85 C - 40 C -20 -25 -10 -15 -20 -30 -35 -25 0 0.5 1 1.5 2 CONTROL VOLTAGE (V) 5 - 158 2.5 3 0 0.5 1 1.5 2 CONTROL VOLTAGE (V) 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 HMC473MS8 / 473MS8E v01.1105 GaAs MMIC VOLTAGE VARIABLE ATTENUATOR, 0.45 - 2.2 GHz Relative Attenuation vs. Control Voltage @ 2.1 GHz 0 +25 C +85 C -40 C RETURN LOSS (dB) -5 -10 -15 +25 C +85 C -40 C -20 -25 -10 -15 -20 -30 -35 -25 0 0.5 1 1.5 2 2.5 3 0 0.5 CONTROL VOLTAGE (V) 1 1.5 2 2.5 3 CONTROL VOLTAGE (V) Relative Attenuation vs. Control Voltage Worse Case Input P1dB vs. Temperature 0 ATTENUATORS - SMT 0 -5 ATTENUATION (dB) 5 Return Loss vs. Control Voltage @ 2.1 GHz 25 INPUT P1dB (dBm) ATTENUATION (dB) -10 -20 -30 -40 -50 1.0 V 1.5 V 1.6V 1.7 V -60 1.8 V 2.0 V 3.0 V 0.7 1 1.3 1.6 FREQUENCY (GHz) 1.9 15 10 +25 C +85 C -40 C -70 0.4 20 2.2 5 0.4 0.6 0.8 1 1.2 1.4 1.6 FREQUENCY (GHz) 1.8 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 2 2.2 5 - 159 HMC473MS8 / 473MS8E v01.1105 GaAs MMIC VOLTAGE VARIABLE ATTENUATOR, 0.45 - 2.2 GHz ATTENUATORS - SMT 5 Absolute Maximum Ratings Control and Bias Voltage VCTL -0.2 Vdc to Vdd VCTL 0 to +3 Vdc @ 1 A Vdd +8 Vdc Vdd +3.3 Vdc 0.1 Vdc @ 10 A Maximum Input Power Vdd = +3.3 Vdc +29 dBm +21 dBm Channel Temperature (Tc) 150 C Thermal Resistance (RTH) (junction to lead) 92 C/W Storage Temperature -65 to +150 C Operating Temperature -40 to +85 C ESD Sensitivity (HBM) Class 1A Min. Atten. Attenuation >2 dB ELECTROSTATIC SENSITIVE DEVICE OBSERVE HANDLING PRECAUTIONS Outline Drawing NOTES: 1. LEADFRAME MATERIAL: COPPER ALLOY 2. DIMENSIONS ARE IN INCHES [MILLIMETERS]. 3. DIMENSION DOES NOT INCLUDE MOLDFLASH OF 0.15mm PER SIDE. 4. DIMENSION DOES NOT INCLUDE MOLDFLASH OF 0.25mm PER SIDE. 5. ALL GROUND LEADS MUST BE SOLDERED TO PCB RF GROUND. Package Information Part Number Package Body Material Lead Finish MSL Rating HMC473MS8 Low Stress Injection Molded Plastic Sn/Pb Solder MSL1 HMC473MS8E RoHS-compliant Low Stress Injection Molded Plastic 100% matte Sn MSL1 Package Marking [3] [1] H473 XXXX [2] H473 XXXX [1] Max peak reflow temperature of 235 C [2] Max peak reflow temperature of 260 C [3] 4-Digit lot number XXXX 5 - 160 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 HMC473MS8 / 473MS8E v01.1105 GaAs MMIC VOLTAGE VARIABLE ATTENUATOR, 0.45 - 2.2 GHz Pin Number Function Description 1, 8 RF1, RF2 These pins are DC coupled and matched to 50 Ohms. DC blocking capacitors are required. 330pF capacitors are supplied on evaluation board. 2, 7 GND Pins must connect to RF ground. 3 Vctl Control voltage 4, 5 N/C No Connection. These pins may be connected to RF ground. Performance will not be affected. 6 Vdd Supply Voltage. Interface Schematic 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 ATTENUATORS - SMT 5 Pin Descriptions 5 - 161 HMC473MS8 / 473MS8E v01.1105 ATTENUATORS - SMT 5 GaAs MMIC VOLTAGE VARIABLE ATTENUATOR, 0.45 - 2.2 GHz Attenuation Linearizing Control Circuit For The HMC473MS8 / HMC473MS8E Voltage Variable Attenuator A driver circuit to improve the attenuation linearity of the HMC473MS8 & HMC473MS8E can be implemented with a simple op-amp configuration. A breakpoint linearization circuit will scale the voltage supplied to the control line of the HMC473MS8 & HMC473MS8E, so that a more linear attenuation vs. control voltage slope can be achieved. A -3.3V and +3.3V supply is required. Diode and resistor values which define the op-amp gain, and breakpoint were selected to optimize a measured production lot of attenuators at 0.9 GHz. R7 may be varied to optimize the performance of any given attenuator. If the input voltage to the linearizing circuit will not drop below 1.0V, the R9 and D2 may be omitted, and this will greatly reduce the overall power consumption of the driver circuit. The linearizing circuit has been optimized for 0.9 GHz attenuation applications. A similar approach may be used at other frequencies by adjusting R1 - R9 resistor values. Application Circuit Required Parts List 5 - 162 Part Description Manufacturer AD822 Op-Amp Analog Devices R1 10K ohms Panasonic R2 200K ohms Panasonic R3 7.5K ohms Panasonic R4 39K ohms Panasonic R5 220K ohms Panasonic R6 91K ohms Panasonic R7 910 ohms Panasonic R8 51 ohms Panasonic R9 100 ohms Panasonic D1, D2 LL4148 D-35 Digi-Key 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 HMC473MS8 / 473MS8E v01.1105 GaAs MMIC VOLTAGE VARIABLE ATTENUATOR, 0.45 - 2.2 GHz 5 ATTENUATORS - SMT Evaluation PCB List of Materials for Evaluation PCB 101827 [1] Item Description J1 - J2 PCB Mount SMA RF Connector J3 - J5 DC PIN C1, C2 330pF capacitor, 0402 Pkg. C3, C4 10KpF capacitor, 0603 Pkg. U1 HMC473MS8 / HMC473MS8E PCB [2] 101825 Eval Board [1] Reference this number when ordering complete evaluation PCB The circuit board used in the final application should be generated with proper RF circuit design techniques. Signal lines at the RF ports should be 50 ohm impedance and the package ground leads should be connected directly to the PCB RF ground plane, similar to that shown above. The evaluation circuit board shown above is available from Hittite Microwave Corporation 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 - 163