HMC274QS16 v00.1002 MICROWAVE CORPORATION 1 dB LSB GaAs IC 5-BIT DIGITAL ATTENUATOR, 0.7 - 2.7 GHz ATTENUATORS - SMT 9 Typical Applications Features The HMC274QS16 is ideal for: 1 dB LSB Steps to 31 dB • Cellular/PCS/3G Infrastructure Single Positive Control (+3 to +5V) Per Bit • 2.4 GHz ISM Radios +/- 0.5 dB Typical Bit Error • Wireless Data Small QSOP16 Plastic Package Functional Diagram General Description The HMC274QS16 is a broadband 5-bit positive control GaAs IC digital attenuator in a 16 lead QSOP plastic package. Covering 0.7 to 2.7 GHz the insertion loss is typically less than 2.3 dB. The attenuator bit values are 1 (LSB), 2, 4, 8, and 16 dB for a total attenuation of 31 dB. Accuracy is excellent at ± 0.5 dB typical with an IIP3 of up to +50 dBm. Five bit control voltage inputs, toggled between 0 and +3 to +5 volts, are used to select each attenuation state. A single Vdd bias of +3 to +5 volts applied through an external 5K Ohm resistor is required. Electrical Specifications, TA = +25° C, Vdd = +3V to +5V & Vctl = 0/Vdd Parameter Frequency Min. Typical Max. Units 2.4 2.7 3.1 dB dB dB Insertion Loss 0.7 - 1.4 GHz 1.4 - 2.3 GHz 2.3 - 2.7 GHz 2.0 2.3 2.5 Attenuation Range 0.7 - 2.7 GHz 31 dB Return Loss (RF1 & RF2, All Atten. States) 0.7 - 1.4 GHz 1.4 - 2.7 GHz 15 17 dB dB 0.7 - 1.4 GHz 1.4 - 2.3 GHz 2.3 - 2.7 GHz ± 0.35 + 5% of Atten. Setting Max ± 0.25 + 3% of Atten. Setting Max ± 0.30 + 5% of Atten. Setting Max dB dB dB 10 12 Attenuation Accuracy: (Referenced to Insertion Loss) All Attenuation States All Attenuation States All Attenuation States Input Power for 0.1 dB Compression Vdd = 5V Vdd = 3V 0.7 - 2.7 GHz 29 20 dBm dBm Input Third Order Intercept Point (Two-tone Input Power = 0 dBm Each Tone) Vdd = 5V Vdd = 3V 0.7 - 2.7 GHz 54 52 dBm dBm 560 600 ns ns Switching Characteristics tRISE, tFALL (10/90% RF) tON, tOFF (50% CTL to 10/90% RF) 9 - 20 0.7 - 2.7 GHz For price, delivery, and to place orders, please contact Hittite Microwave Corporation: 12 Elizabeth Drive, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373 Order Online at www.hittite.com HMC274QS16 v00.1002 MICROWAVE CORPORATION 1 dB LSB GaAs IC 5-BIT DIGITAL ATTENUATOR, 0.7 - 2.7 GHz Return Loss RF1, RF2 Insertion Loss (Only Major States are Shown) 0 +25 C +85 C -40 C -1.5 -2 -2.5 -3 -3.5 -4 9 I.L. 1 dB 2 dB 4 dB 8 dB 16 dB 31 dB -5 RETURN LOSS (dB) INSERTION LOSS (dB) -1 -10 -15 -20 -25 -4.5 -5 0.5 1 1.5 2 2.5 -30 0.5 3 1 1.5 FREQUENCY (GHz) 2 2.5 3 FREQUENCY (GHz) Normalized Attenuation Bit Error vs. Attenuation State 0 1.5 -5 1 -10 BIT ERROR (dB) NORMALIZED ATTENUATION (dB) (Only Major States are Shown) -15 -20 -25 0 -0.5 0.9 GHz 1.9 GHz 2.4 GHz -1 -30 -35 0.5 0.5 -1.5 1 1.5 2 2.5 0 3 4 8 FREQUENCY (GHz) 12 16 20 24 Relative Phase vs. Frequency (Only Major States are Shown) (Only Major States are Shown) 32 150 RELATIVE PHASE (deg) 2 1 BIT ERROR (dB) 28 ATTENUATION STATE (dB) Bit Error vs. Frequency 0 1 dB 2 dB 4 dB 8 dB 16 dB 31 dB -1 -2 0.5 ATTENUATORS - SMT 0 -0.5 1 1.5 2 2.5 FREQUENCY (GHz) 3 1 dB 2 dB 4 dB 8 dB 16 dB 31 dB 100 50 0 -50 -100 0.5 1 1.5 2 2.5 3 FREQUENCY (GHz) Note: All Data Typical Over Voltage (+3V to +5V). For price, delivery, and to place orders, please contact Hittite Microwave Corporation: 12 Elizabeth Drive, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373 Order Online at www.hittite.com 9 - 21 MICROWAVE CORPORATION HMC274QS16 v00.1002 1 dB LSB GaAs IC 5-BIT DIGITAL ATTENUATOR, 0.7 - 2.7 GHz Compression Point & IP3 ATTENUATORS - SMT 9 Input P1dB (dBm) Input P0.1dB (dBm) Input IP3 (dBm) Attenuation State (dB) Control Voltage (V) +25C +85C -40C +25C +85C -40C +25C +85C -40C 1 5 32.3 31.8 32.9 29.4 28.8 29.8 54.7 49.1 52.2 2 5 32.3 31.8 32.8 29.2 28.6 29.4 52.2 49.1 52.2 4 5 32.8 32.1 33.3 29.4 28.7 29.3 54.1 48.65 52.7 1 3 24.8 25.7 25.2 19.7 18.6 21.1 52.2 48.1 52.5 2 3 24.7 24.1 25.1 19.7 18.3 21.0 52.2 48.1 52.2 4 3 26.0 25.6 26.6 19.6 18.6 21.1 53.1 47.65 53.2 Application Circuit DC blocking capacitors C1 & C2 are required on RF1 & RF2. Choose C1 = C2 = 100 ~ 300 pF to allow lowest customer specific frequency to pass with minimal loss. R1 = 5K Ohm is required to supply voltage to the circuit through either PIN 9 or PIN 16. 9 - 22 For price, delivery, and to place orders, please contact Hittite Microwave Corporation: 12 Elizabeth Drive, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373 Order Online at www.hittite.com MICROWAVE CORPORATION HMC274QS16 v00.1002 1 dB LSB GaAs IC 5-BIT DIGITAL ATTENUATOR, 0.7 - 2.7 GHz Control Voltages Control Voltage Input V1 16 dB High V2 8 dB High V3 4 dB High V4 2 dB High V5 1 dB High Attenuation Setting RF1 - RF2 Reference I.L. High High High High Low 1 dB High High High Low High 2 dB High High Low High High 4 dB High Low High High High 8 dB Low High High High High 16 dB Low 31 dB Max. Atten. Low Low Low Low Any combination of the above states will provide an attenuation approximately equal to the sum of the bits selected. State Bias Condition Low 0 to +0.2 V @ 20 uA Max High Vdd ± 0.2V @ 100 uA Max 9 Note: Vdd = +3V to 5V ± 0.2V Absolute Maximum Ratings Control Voltage (V1 - V5) Vdd + 0.5 Vdc Bias Voltage (Vdd) +8.0 Vdc Storage Temperature -65 to +150 °C Operating Temperature -40 to +85 °C RF Input Power (0.7 - 2.7 GHz) +30 dBm Outline Drawing ATTENUATORS - SMT Truth Table NOTES: 1. PACKAGE BODY MATERIAL: LOW STRESS INJECTION MOLDED PLASTIC SILICA AND SILICON IMPREGNATED. 2. LEADFRAME MATERIAL: COPPER ALLOY 3. LEADFRAME PLATING: Sn/Pb SOLDER 4. DIMENSIONS ARE IN INCHES [MILLIMETERS]. 5. DIMENSION DOES NOT INCLUDE MOLDFLASH OF 0.15mm PER SIDE. 6. DIMENSION DOES NOT INCLUDE MOLDFLASH OF 0.25mm PER SIDE. 7. ALL GROUND LEADS MUST BE SOLDERED TO PCB RF GROUND. For price, delivery, and to place orders, please contact Hittite Microwave Corporation: 12 Elizabeth Drive, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373 Order Online at www.hittite.com 9 - 23 HMC274QS16 v00.1002 MICROWAVE CORPORATION 1 dB LSB GaAs IC 5-BIT DIGITAL ATTENUATOR, 0.7 - 2.7 GHz Pin Descriptions ATTENUATORS - SMT 9 9 - 24 Pin Number Function Description 1, 2, 8, 10 - 15 GND This pin must be DC grounded. 3-7 V1 - V5 See truth table and control voltage table. 9 RF1 This pin is DC coupled and matched to 50 Ohm. Blocking capacitors are required. 16 RF1 This pin is DC coupled and matched to 50 Ohm. Blocking capacitors are required. Interface Schematic For price, delivery, and to place orders, please contact Hittite Microwave Corporation: 12 Elizabeth Drive, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373 Order Online at www.hittite.com HMC274QS16 v00.1002 MICROWAVE CORPORATION 1 dB LSB GaAs IC 5-BIT DIGITAL ATTENUATOR, 0.7 - 2.7 GHz 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. ATTENUATORS - SMT 9 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 should be connected directly to the ground plane similar to that shown below. A sufficient number of VIA holes should be used to connect the top and bottom ground planes. The evaluation circuit board as shown is available from Hittite Microwave Corporation upon request. List of Material Item Description J1 - J2 PC Mount SMA Connector J3 - J11 DC Pin R1 5k Ohm Resistor, 0402 Chip R2 - R6 100 Ohm Resistor, 0402 Chip C1, C2 0402 Chip Capacitor, Select for Lowest Frequency of Operation U1 HMC274QS16 Digital Attenuator PCB* 104931 Evaluation PCB *Circuit Board Material: Rogers 4350 For price, delivery, and to place orders, please contact Hittite Microwave Corporation: 12 Elizabeth Drive, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373 Order Online at www.hittite.com 9 - 25