HMC288MS8 / 288MS8E v01.0705 ATTENUATORS - SMT 5 2 dB LSB GaAs MMIC 3-BIT DIGITAL ATTENUATOR, 0.7 - 3.7 GHz Typical Applications Features The HMC288MS8 / HMC288MS8E is ideal for: 2 dB LSB Steps to 14 dB • Cellular Single Positive Control Per BIT • PCS, ISM, MMDS Monotonic: ±03 dB Bit Error Typical • WLL applications Miniature MSOP-8 Package, 14.8mm2 Functional Diagram General Description The HMC288MS8 & HMC288MS8E are broadband 3-bit positive control GaAs IC digital attenuators in 8 lead MSOP surface mount plastic packages. Covering 0.7 to 3.7 GHz, the insertion loss is typically less than 1.2 to 1.8 dB. The attenuator bit values are 2 (LSB), 4, and 8 dB for a total attenuation of 14 dB. Accuracy is excellent at ± 0.3 dB typical with an IIP3 of up to +51 dBm. Three bit control voltage inputs, toggled between 0 and +3 to +5V, are used to select each attenuation state at less than 50 uA each. A single Vdd bias of +3 to +5V applied through an external 5K Ohm resistor is required while occupying less than 14.8 mm2. Electrical Specifi cations, TA = +25° C, Vdd = +3V to +5V & Vctl = 0/Vdd (Unless Otherwise Stated) Parameter Typical Max. Units Insertion Loss 0.7 - 1.4 GHz 1.4 - 2.3 GHz 2.3 - 2.7 GHz 2.7 - 3.7 GHz Frequency Min. 1.0 1.3 1.5 1.7 1.4 1.7 2.0 2.3 dB dB dB dB Attenuation Range 0.7 - 3.7 GHz 14 dB Return Loss (RF1 & RF2, All Atten. States) 0.7 - 1.4 GHz 1.4 - 2.3 GHz 2.3 - 2.7 GHz 2.7 - 3.7 GHz 14 11 10 9 17 15 14 12 dB dB dB dB 0.7 - 1.4 GHz 1.4 - 2.3 GHz 2.3 - 2.7 GHz 2.7 - 3.7 GHz ± 0.3 + 3% of Atten. Setting Max ± 0.2 + 3% of Atten. Setting Max ± 0.3 + 3% of Atten. Setting Max ± 0.3 + 4% of Atten. Setting Max dB dB dB dB Attenuation Accuracy: (Referenced to Insertion Loss) All Attenuation States All Attenuation States All Attenuation States All Attenuation States Input Power for 0.1 dB Compression 5V 3V 0.7 - 3.7 GHz 25 22 dBm dBm Input Third Order Intercept Point (Two-tone Input Power = 0dBm Each Tone) 5V 3V 0.7 - 3.7 GHz 51 47 dBm dBm 0.7 - 3.7 GHz 560 600 ns ns Switching Characteristics tRISE, tFALL (10/90% RF) tON, tOFF (50% CTL to 10/90% RF) 5 - 34 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 HMC288MS8 / 288MS8E v01.0705 2 dB LSB GaAs MMIC 3-BIT DIGITAL ATTENUATOR, 0.7 - 3.7 GHz 5 Return Loss RF1, RF2 Insertion Loss (Only Major States are Shown) 2 dB 4 dB 8 dB 14 dB -5 -1 RETURN LOSS (dB) INSERTION LOSS (dB) -0.5 -1.5 -2 -2.5 +25 C -40 C +85 C -3 -10 -15 -20 -3.5 -4 0.5 1 1.5 2 2.5 3 3.5 -25 0.5 4 1 1.5 FREQUENCY (GHz) 2.5 3 (Only Major States are Shown) 4 1.5 0 -2 1.2 BIT ERROR (dB) -4 -6 -8 -10 2 dB 4 dB 8 dB 14 dB -12 0.9 GHz 1.9 GHz 2.4 GHz 3.5 GHz 0.9 0.6 0.3 -14 -16 0.5 0 1 1.5 2 2.5 3 3.5 2 4 4 FREQUENCY (GHz) 6 8 10 12 Relative Phase vs. Frequency (Only Major States are Shown) (Only Major States are Shown) 60 RELATIVE PHASE (deg.) 1.5 1.2 2 dB 4 dB 8 dB 14 dB 0.9 0.6 0.3 0 0.5 14 ATTENUATION STATE (dB) Absolute Bit Error vs. Frequency BIT ERROR (dB) 3.5 Absolute Bit Error vs. Attenuation State Normalized Attenuation NORMALIZED ATTENUATION (dB) 2 FREQUENCY (GHz) ATTENUATORS - SMT 0 0 1 1.5 2 2.5 FREQUENCY (GHz) 3 3.5 4 2 dB 4 dB 8 dB 16 dB 40 20 0 -20 0.5 1 1.5 2 2.5 3 3.5 4 FREQUENCY (GHz) Note: All Data Typical Over Voltage (+3V to +5V) & Temperature (-40 to +85 deg. C.). 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 - 35 HMC288MS8 / 288MS8E v01.0705 ATTENUATORS - SMT 5 Truth Table Control & Bias Voltages Control Voltage Input V1 8 dB V2 4 dB V3 2 dB Reference I.L. High High High Low 2 dB High Low High 4 dB Low High High 8 dB Low 14 dB Max. Atten. Low High Attenuation Setting RF1 - RF2 High Low 2 dB LSB GaAs MMIC 3-BIT DIGITAL ATTENUATOR, 0.7 - 3.7 GHz State Bias Condition Low 0 to +0.2V @ 20 uA Max. High Vdd ± 0.2V @ 50 uA Max Note: Vdd = +3V to 5V ± 0.2V Any combination of the above states will provide an attenuation approximately equal to the sum of the bits selected. 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 throught either PIN 5 or PIN 8. 5 - 36 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 HMC288MS8 / 288MS8E v01.0705 2 dB LSB GaAs MMIC 3-BIT DIGITAL ATTENUATOR, 0.7 - 3.7 GHz 5 Control Voltage (V1, V2, V3) 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 - 4 GHz) +28 dBm ATTENUATORS - SMT Absolute Maximum Ratings 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 HMC288MS8 Low Stress Injection Molded Plastic Sn/Pb Solder MSL1 HMC288MS8E RoHS-compliant Low Stress Injection Molded Plastic 100% matte Sn MSL1 Package Marking [3] [1] H288 XXXX [2] H288 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 - 37 HMC288MS8 / 288MS8E v01.0705 Evaluation Circuit Board ATTENUATORS - SMT 5 2 dB LSB GaAs MMIC 3-BIT DIGITAL ATTENUATOR, 0.7 - 3.7 GHz * R2 = R3 = R4 = 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 103143 Item Description J1 - J2 PCB Mount SMA Connector J3 - J6 DC Pin R1 5k Ohm Resistor, 0402 Chip R2, R3, R4 100 Ohm Resistor, 0402 Chip C1, C2 0402 Chip Capacitor, Select for Lowest Frequency of Operation U1 HMC288MS8 / HMC288MS8E Digital Attenuator PCB [2] 103141 Evaluation PCB 1.5” x 1.5” [1] 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. 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 5 - 38 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 HMC288MS8 / 288MS8E v01.0705 2 dB LSB GaAs MMIC 3-BIT DIGITAL ATTENUATOR, 0.7 - 3.7 GHz 5 ATTENUATORS - SMT Notes: 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 - 39