Analog Devices Welcomes Hittite Microwave Corporation NO CONTENT ON THE ATTACHED DOCUMENT HAS CHANGED www.analog.com www.hittite.com THIS PAGE INTENTIONALLY LEFT BLANK HMC274QS16 / 274QS16E v01.0505 ATTENUATORS - SMT 5 1 dB LSB GaAs IC 5-BIT DIGITAL ATTENUATOR, 0.7 - 2.7 GHz Typical Applications Features The HMC274QS16 / HMC274QS16E 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 Included in the HMC-DK004 Designer’s Kit Functional Diagram General Description The HMC274QS16 & HMC274QS16E are broadband 5-bit positive control GaAs IC digital attenuators in 16 lead QSOP plastic packages. 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 Specifi cations, TA = +25° C, Vdd = +3V to +5V & Vctl = 0/Vdd Parameter Frequency Insertion Loss 0.7 - 1.4 GHz 1.4 - 2.3 GHz 2.3 - 2.7 GHz Attenuation Range 0.7 - 2.7 GHz Return Loss (RF1 & RF2, All Atten. States) 0.7 - 1.4 GHz 1.4 - 2.7 GHz Min. Typical Max. Units 2.0 2.3 2.5 2.4 2.7 3.1 dB dB dB 31 dB 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) 5 - 28 0.7 - 2.7 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 HMC274QS16 / 274QS16E v01.0505 1 dB LSB GaAs IC 5-BIT DIGITAL ATTENUATOR, 0.7 - 2.7 GHz 5 Return Loss RF1, RF2 Insertion Loss (Only Major States are Shown) -2 -3 +25 C +85 C -40 C -4 -5 0.5 I.L. 1 dB 2 dB 4 dB 8 dB 16 dB 31 dB -5 -1 1 1.5 2 -10 -15 -20 -25 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 -35 0.5 0.5 0 -0.5 0.9 GHz 1.9 GHz 2.4 GHz -1 -30 -1.5 1 1.5 2 2.5 3 0 4 8 FREQUENCY (GHz) 12 16 20 Relative Phase vs. Frequency (Only Major States are Shown) (Only Major States are Shown) 28 32 150 RELATIVE PHASE (deg) 2 1 BIT ERROR (dB) 24 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 RETURN LOSS (dB) INSERTION LOSS (dB) 0 1 1.5 2 2.5 3 FREQUENCY (GHz) 100 1 dB 2 dB 4 dB 8 dB 16 dB 31 dB 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: 20 Alpha Road, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373 Order On-line at www.hittite.com 5 - 29 HMC274QS16 / 274QS16E v01.0505 ATTENUATORS - SMT 5 1 dB LSB GaAs IC 5-BIT DIGITAL ATTENUATOR, 0.7 - 2.7 GHz Compression Point & IP3 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. Truth Table Control Voltage Input V1 16 dB V2 8 dB V3 4 dB V4 2 dB V5 1 dB Attenuation Setting RF1 - RF2 High High High High High 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 Low Low Low Low 31 dB Max. Atten. Any combination of the above states will provide an attenuation approximately equal to the sum of the bits selected. 5 - 30 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 HMC274QS16 / 274QS16E Absolute Maximum Ratings 1 dB LSB GaAs IC 5-BIT DIGITAL ATTENUATOR, 0.7 - 2.7 GHz 5 Control Voltages Control Voltage (V1 - V5) Vdd + 0.5 Vdc State Bias Condition Bias Voltage (Vdd) +8.0 Vdc Low 0 to +0.2 V @ 20 uA Max Storage Temperature -65 to +150 °C High Vdd ± 0.2V @ 100 uA Max Operating Temperature -40 to +85 °C ATTENUATORS - SMT v01.0505 Note: Vdd = +3V to 5V ± 0.2V RF Input Power (0.7 - 2.7 GHz) +30 dBm 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 HMC274QS16 Low Stress Injection Molded Plastic Sn/Pb Solder MSL1 HMC274QS16E RoHS-compliant Low Stress Injection Molded Plastic 100% matte Sn MSL1 Package Marking [3] [1] HMC274 XXXX [2] HMC274 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 - 31 HMC274QS16 / 274QS16E v01.0505 1 dB LSB GaAs IC 5-BIT DIGITAL ATTENUATOR, 0.7 - 2.7 GHz ATTENUATORS - SMT 5 5 - 32 Pin Descriptions 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: 20 Alpha Road, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373 Order On-line at www.hittite.com HMC274QS16 / 274QS16E v01.0505 1 dB LSB GaAs IC 5-BIT DIGITAL ATTENUATOR, 0.7 - 2.7 GHz * 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 5 Evaluation PCB List of Materials for Evaluation PCB 104976 [1] Item Description J1 - J2 PCB 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 / HMC274QS16E Digital Attenuator PCB [2] 104931 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 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. [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 - 33