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| HMC288MS8 / 288MS8E v01.0705 2 dB LSB GaAs MMIC 3-BIT DIGITAL ATTENUATOR, 0.7 - 3.7 GHz Typical Applications Features 2 dB LSB Steps to 14 dB Single Positive Control Per BIT Monotonic: 03 dB Bit Error Typical Miniature MSOP-8 Package, 14.8mm2 6 ATTENUATORS - SMT The HMC288MS8 / HMC288MS8E is ideal for: * Cellular * PCS, ISM, MMDS * WLL applications Functional Diagram General Description The HMC288MS8 & HMC288MS8E are broadband 3bit 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 Specifications, TA = +25 C, Vdd = +3V to +5V & Vctl = 0/Vdd (Unless Otherwise Stated) Parameter Frequency 0.7 - 1.4 GHz 1.4 - 2.3 GHz 2.3 - 2.7 GHz 2.7 - 3.7 GHz 0.7 - 3.7 GHz 0.7 - 1.4 GHz 1.4 - 2.3 GHz 2.3 - 2.7 GHz 2.7 - 3.7 GHz 14 11 10 9 Min. Typical 1.0 1.3 1.5 1.7 14 17 15 14 12 Max. 1.4 1.7 2.0 2.3 Units dB dB dB dB dB dB dB dB dB Insertion Loss Attenuation Range Return Loss (RF1 & RF2, All Atten. States) 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 Input Third Order Intercept Point (Two-tone Input Power = 0dBm Each Tone) Switching Characteristics tRISE, tFALL (10/90% RF) tON, tOFF (50% CTL to 10/90% RF) 0.7 - 3.7 GHz 560 600 ns ns 5V 3V 5V 3V 0.7 - 1.4 GHz 1.4 - 2.3 GHz 2.3 - 2.7 GHz 2.7 - 3.7 GHz 0.7 - 3.7 GHz 0.7 - 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 25 22 51 47 dB dB dB dB dBm dBm dBm dBm 6 - 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 Return Loss RF1, RF2 Insertion Loss 0 -0.5 INSERTION LOSS (dB) (Only Major States are Shown) 0 2 dB 4 dB 8 dB 14 dB 6 ATTENUATORS - SMT 6 - 35 -5 -1.5 -2 -2.5 -3 -3.5 -4 0.5 -25 0.5 +25 C -40 C +85 C RETURN LOSS (dB) -1 -10 -15 -20 1 1.5 2 2.5 3 3.5 4 1 1.5 2 2.5 3 3.5 4 FREQUENCY (GHz) FREQUENCY (GHz) Normalized Attenuation (Only Major States are Shown) 0 NORMALIZED ATTENUATION (dB) -2 Absolute Bit Error vs. Attenuation State 1.5 1.2 -4 BIT ERROR (dB) -6 -8 -10 -12 -14 -16 0.5 0 1 1.5 2 2.5 3 3.5 4 2 4 6 8 10 12 14 FREQUENCY (GHz) ATTENUATION STATE (dB) 2 dB 4 dB 8 dB 14 dB 0.9 0.9 GHz 1.9 GHz 2.4 GHz 3.5 GHz 0.6 0.3 Absolute Bit Error vs. Frequency (Only Major States are Shown) 1.5 Relative Phase vs. Frequency (Only Major States are Shown) 60 1.2 BIT ERROR (dB) 2 dB 4 dB 8 dB 14 dB RELATIVE PHASE (deg.) 40 2 dB 4 dB 8 dB 16 dB 0.9 20 0.6 0 0.3 0 0.5 1 1.5 2 2.5 3 3.5 4 -20 0.5 1 1.5 2 2.5 3 3.5 4 FREQUENCY (GHz) 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 HMC288MS8 / 288MS8E v01.0705 2 dB LSB GaAs MMIC 3-BIT DIGITAL ATTENUATOR, 0.7 - 3.7 GHz Truth Table Control & Bias Voltages V3 2 dB High Low High High Low Attenuation Setting RF1 - RF2 Reference I.L. 2 dB 4 dB 8 dB 14 dB Max. Atten. State Low High Bias Condition 0 to +0.2V @ 20 uA Max. Vdd 0.2V @ 50 uA Max 6 ATTENUATORS - SMT Control Voltage Input V1 8 dB High High High Low Low V2 4 dB High High Low High Low 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. 6 - 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 Absolute Maximum Ratings Control Voltage (V1, V2, V3) Bias Voltage (Vdd) Storage Temperature Operating Temperature RF Input Power (0.7 - 4 GHz) Vdd + 0.5 Vdc +8.0 Vdc -65 to +150 C 6 ATTENUATORS - SMT 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. -40 to +85 C +28 dBm ELECTROSTATIC SENSITIVE DEVICE OBSERVE HANDLING PRECAUTIONS Outline Drawing Package Information Part Number HMC288MS8 HMC288MS8E Package Body Material Low Stress Injection Molded Plastic RoHS-compliant Low Stress Injection Molded Plastic Lead Finish Sn/Pb Solder 100% matte Sn MSL Rating MSL1 MSL1 [1] Package Marking [3] H288 XXXX H288 XXXX [2] [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 6 - 37 HMC288MS8 / 288MS8E v01.0705 2 dB LSB GaAs MMIC 3-BIT DIGITAL ATTENUATOR, 0.7 - 3.7 GHz Evaluation Circuit Board 6 ATTENUATORS - SMT * 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 J1 - J2 J3 - J6 R1 R2, R3, R4 C1, C2 U1 PCB [2] Description PCB Mount SMA Connector DC Pin 5k Ohm Resistor, 0402 Chip 100 Ohm Resistor, 0402 Chip 0402 Chip Capacitor, Select for Lowest Frequency of Operation HMC288MS8 / HMC288MS8E Digital Attenuator 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 6 - 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 Notes: 6 ATTENUATORS - SMT 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 6 - 39 |
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