HMC335G16 v00.1102 ATTENUATORS - SMT 5 1dB LSB GaAs MMIC 5-BIT DIGITAL ATTENUATOR, DC - 3 GHz Typical Applications Features The HMC335G16 is ideal for: 1 dB LSB Steps to 31 dB • Telecom Infrastructure Single Control Line Per Bit • Military Radios, Radar & ECM ± 0.5 dB Typical Bit Error • Space Applications 16 Lead Hermetic SMT Package • Test Instrumentation Functional Diagram General Description The HMC335G16 is a broadband 5-bit GaAs IC digital attenuator in a 16 lead glass/metal (hermetic) surface mount package. Covering DC to 3 GHz, the insertion loss is less than 2.3 dB typical. The attenuator bit values are 1 (LSB), 2, 4, 8, and 16 dB for a total attenuation of 31 dB. Attenuation accuracy is excellent at ±0.5 dB typical with an IIP3 of up to +44 dBm. Five bit control voltage inputs, toggled between 0 and -5V, are used to select each attenuation state at less than 70 µA each. A single Vee bias of -5V allows operation down to DC. Electrical Specifi cations, TA = +25° C, Vee = -5V & Vctl = 0/Vee Parameter Typical Max. Units DC - 1.5 GHz 1.5 - 3.0 GHz 2.0 2.3 2.5 2.8 dB dB Attenuation Range DC - 3 GHz 31 dB Return Loss (RF1 & RF2, All Atten. States) DC - 3 GHz 13 dB Attenuation Accuracy: (Referenced to Insertion Loss) 1 - 31 dB States 1 - 27 dB States 28 - 31 dB States 1 - 23 dB States 24 - 27 dB States 28 - 31 dB States DC - 1.0 GHz 1.0 - 2.0 GHz 1.0 - 2.0 GHz 2.0 - 3.0 GHz 2.0 - 3.0 GHz 2.0 - 3.0 GHz ± 0.3 + 5% of Atten. Setting Max ± 0.3 + 5% of Atten. Setting Max ± 0.3 + 8% of Atten. Setting Max ± 0.3 + 5% of Atten. Setting Max ± 0.3 + 8% of Atten. Setting Max ± 0.5 + 10% of Atten. Setting Max dB dB dB dB dB dB Input Power for 0.1 dB Compression 0.5 - 3.0 GHz 24 dBm Input Third Order Intercept Point (Two-tone Input Power = 0 dBm Each Tone) 0.5 - 3.0 GHz 44 dBm DC - 3 GHz 140 160 ns ns Insertion Loss Frequency Min. Switching Characteristics tRISE, tFALL (10/90% RF) tON, tOFF (50% CTL to 10/90% RF) 5 - 72 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 HMC335G16 v00.1102 1dB LSB GaAs MMIC 5-BIT DIGITAL ATTENUATOR, DC - 3 GHz (Only Major States are Shown) 0 0 -1 -5 RETURN LOSS (dB) INSERTION LOSS (dB) Insertion Loss -2 -3 +25C +85C -40C -4 -5 1 dB 2 dB 4 dB -10 -15 -20 -25 -30 -6 -35 0 0.5 1 1.5 2 2.5 3 3.5 4 0 0.5 1 FREQUENCY (GHz) 0 3 -5 2 BIT ERROR (dB) -10 -15 1 dB 2 dB 4 dB -25 2 2.5 8 dB 16 dB 31 dB 3.5 4 24 28 32 3.5 4 1 0 -1 0.12 GHz 1.0 GHz 2.0 GHz 3.0 GHz -2 -30 -3 -35 0 0.5 1 1.5 2 2.5 3 3.5 0 4 4 8 12 16 20 ATTENUATION STATE (dB) FREQUENCY (GHz) Bit Error vs. Frequency Relative Phase vs. Frequency (Only Major States are Shown) (Only Major States are Shown) 5 100 1 dB 2 dB 4 dB 8 dB 16 dB 31 dB 80 RELATVIE PHASE (deg) 3 BIT ERROR (dB) 3 Bit Error vs. Attenuation State (Only Major States are Shown) -20 1.5 FREQUENCY (GHz) Normalized Attenuation NORMALIZED ATTENUATION (dB) 8 dB 16 dB 31 dB ATTENUATORS - SMT 5 Return Loss RF1, RF2 1 -1 1 dB 2 dB 4 dB -3 8 dB 16 dB 31 dB 60 40 20 0 -5 -20 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 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 - 73 HMC335G16 v00.1102 5 1dB LSB GaAs MMIC 5-BIT DIGITAL ATTENUATOR, DC - 3 GHz Worst Case Step Error Between Successive Attenuation States 2 STEP ERROR (dB) ATTENUATORS - SMT 3 1 0 Absolute Maximum Ratings Control Voltage (V1 - V5) Vee - 0.5 Vdc Bias Voltage (Vee) -7.0 Vdc Storage Temperature -65 to +150 °C Operating Temperature -40 to +85 °C RF Input Power (0.5 - 3 GHz) +26 dBm -1 ELECTROSTATIC SENSITIVE DEVICE OBSERVE HANDLING PRECAUTIONS -2 -3 0 0.5 1 1.5 2 2.5 3 3.5 4 FREQUENCY (GHz) Bias Voltage & Current Truth Table Control Voltage Input Vee Range = -5.0 Vdc ± 10% V5 1 dB Attenuation State RF1 - RF2 Low Low Reference I.L. Low High 1 dB High Low 2 dB High Low Low 4 dB Low Low Low 8 dB Low Low Low Low 16 dB High High High High 31 dB Max. Atten. Vee (VDC) lee (Typ.) (mA) lee (Max.) (mA) V1 16 dB -5.0 3 6 Low Low Low Low Low Low Low Low Low Low Low Low High High High Control Voltage State Bias Condition Low 0 to -2V @ 70 µA Typ. High Vee to Vee + 0.8V @ 5 µA Typ. Note: Vee = -5V ± 10% V2 8 dB V3 4 dB V4 2 dB Any combination of the above states will provide an attenuation approximately equal to the sum of the bits selected. 5 - 74 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 HMC335G16 v00.1102 1dB LSB GaAs MMIC 5-BIT DIGITAL ATTENUATOR, DC - 3 GHz 5 ATTENUATORS - SMT Outline Drawing NOTES: 1. PACKAGE MATERIAL: ALUMINA LOADED BOROSILICATE GLASS. 2. LEADS, BASE, COVER MATEIRAL: KOVARTM (#7052 CORNING). 3. PLATING: ELECTROLYTIC GOLD 50 MICROINCHES MIN., OVER ELECTROLYTIC NICKEL 75 MICROINCHES MIN. 4. ALL DIMENSIONS ARE IN INCHES [MILLIMETERS]. 5. TOLERANCES: 0.005 [.013] UNLESS OTHERWISE SPECIFIED. 6. CHARACTERS TO BE HELVETICA MEDIUM .030 HIGH, BLACK INK, LOCATED APPROX. AS SHOWN. 7. ALL GROUND LEADS AND GROUND PADDLE MUST BE SOLDERED TO PCB RF GROUND. Pin Descriptions Pin Number Function Description 1 Vee Supply Voltage -5V ±10% 2, 4-9, 11 GND Package bottom must also be connected to RF ground. 3, 10 RF1, RF2 These pins are DC coupled and matched to 50 Ohm. Blocking capacitors are required. 12-16 V1-V5 See truth table and control voltage table. 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 5 - 75 HMC335G16 v00.1102 Application Circuit ATTENUATORS - SMT 5 1dB LSB GaAs MMIC 5-BIT DIGITAL ATTENUATOR, DC - 3 GHz DC Blocking Capacitors C1 & C2 are required on RF1 & RF2. Choose C1 = C2 = 100 pF ~ 0.1 uF to allow lowest customer specifi c frequency to pass with minimal loss. R1= 5K Ohm is required to supply voltage to the circuit through either Pin 3 or Pin 10. Suggested Driver Circuit (One Circuit Required Per Bit Control Input) Simple driver using inexpensive standard logic ICs provides fast switching using minimum DC current. * Recommended value to suppress unwanted RF signals at V1 - V5 control lines. 5 - 76 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 HMC335G16 v00.1102 1dB LSB GaAs MMIC 5-BIT DIGITAL ATTENUATOR, DC - 3 GHz 5 ATTENUATORS - SMT Evaluation PCB * R2 - R6 = 100 Ohm. These resistors are optional and may be used to enhance decoupling of the RF path from the control inputs. List of Materials for Evaluation PCB 106568 [1] Item Description J1 - J2 PCB Mount SMA Connector J3 DC Connector R1 5k Ohm Resistor 0402 Pkg. R2 - R6 100 Ohm Resistor, 0402 Pkg. C1, C2 0402 Chip Capacitor, Select Value for Lowest Frequency of Operation C3 1000pF Capacitor, 0603 Pkg. U1 HMC335G16 Digital Attenuator PCB [2] 106467 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 package bottom 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. [1] Reference this number when ordering complete evaluation PCB [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 - 77