Features. Parameter Frequency (GHz) Min. Typ. Max. Units GHz GHz GHz. Attenuation Range GHz 15.

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1 v.6.5 LSB GaAs MMIC 5-BIT DIGITAL ATTENUATOR, GHz Typical Applications Features The is ideal for: Fiber Optics & Broadband Telecom Microwave Radio & VSAT Military Radios, Radar & ECM Space Applications Sensors Test & Measurement Equipment Functional Diagram.5 LSB Steps to Single Positive Control Line Per Bit ±.5 Typical Bit Error High Input IP3: +45 m 6mm 2 Leadless SMT Plastic Package General Description The is a broadband 5-bit GaAs IC digital attenuators in low cost leadless surface mount packages. Covering. to 33. GHz, the insertion loss is less than typical. The attenuator bit values are.5 (LSB),, 2, 4, 8, for a total attenuation of. Attenuation accuracy is excellent at ±.3 typical step error with an IIP3 of +45 m. Five control voltage inputs, toggled between +5V and V, are used to select each attenuation state. Electrical Specifications, T A = +25 C, With Vdd = +5V, Vss = -5V, P - P4 = / +5V Parameter Frequency (GHz) Min. Typ. Max. Units Insertion Loss GHz GHz GHz Attenuation Range GHz Return Loss (RF & RF2, All Atten. States) GHz Attenuation Accuracy: (Referenced to Insertion Loss) States 8 - States GHz GHz ± (.3 + 4% of Atten. Setting) Max ± (.3 + 8% of Atten. Setting) Max Input Power for. Compression. -.5 GHz GHz m m Input Third Order Intercept Point (Two-Tone Input Power= +m Each Tone). -.5 GHz GHz m m Switching Characteristics trise, tfall (/9% RF) ton/toff (5% CTL to /9% RF) GHz 4 5 ns ns Idd GHz ma Iss GHz ma Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other rights of third parties that may result from its use. Specifications subject to change without notice. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Trademarks and registered trademarks are the property of their respective owners. For price, delivery, and to place orders: Analog Devices, Inc., One Technology Way, P.O. Box 96, Norwood, MA Phone: Order online at Application Support: Phone: -8-ANALOG-D

2 Insertion Loss vs. Temperature v.6.5 LSB GaAs MMIC 5-BIT DIGITAL ATTENUATOR, GHz Normalized Attenuation INSERTION LOSS () Input Return Loss +25 C +85 C -4 C NORMALIZED ATTENUATION () Output Return Loss I.L.5 8 RETURN LOSS () RETURN LOSS () IL.5 Bit Error vs. Attenuation State BIT ERROR () ATTENUATION STATE () 5. GHz GHz 8 GHz 26.5 GHz 33 GHz IL.5 Bit Error vs. Frequency BIT ERROR () I.L.5 For price, delivery, and to place orders: Analog Devices, Inc., One Technology Way, P.O. Box 96, Norwood, MA Phone: Order online at Application Support: Phone: -8-ANALOG-D 2

3 Relative Phase vs. Frequency 6 v.6.5 LSB GaAs MMIC 5-BIT DIGITAL ATTENUATOR, GHz Step Attenuation vs. Attenuation State. - 8 GHz.2 RELATIVE PHASE (deg) Input IP3 Over Major Attenuation States 6 I.L.5 Step Attenuation vs. Attenuation State 8-33 GHz STEP ATTENUATION () ATTENUATION STATE () 26.5 GHz 33 GHz STEP ATTENUATION () ATTENUATION STATE () 5 GHz GHz 8 GHz Input Power for. Compression P. (m) Input IP3 vs. Temperature (Minimum Attenuation State) 6-4C 25C 85C 5 5 IP3 (m) 4 IP3 (m) C +25C +85C 3 For price, delivery, and to place orders: Analog Devices, Inc., One Technology Way, P.O. Box 96, Norwood, MA Phone: Order online at Application Support: Phone: -8-ANALOG-D

4 v.6.5 LSB GaAs MMIC 5-BIT DIGITAL ATTENUATOR, GHz Absolute Maximum Ratings Bias Voltages & Currents RF Input Power (. to 33. GHz) Control Voltage (P to P4) Vdd Vss +27m Vdd Vdc -7 Vdc Channel Temperature 5 C Continuous Pdiss (T = 85 o C) (derate 6.8 mw/ o C above 85 o C) Thermal Resistance.453 W 43.5 C/W Storage Temperature -65 to 5 C Operating Temperature -4 to +85 C ESD Sensitivity (HBM) Outline Drawing ClassA Control Voltage State Low High Vdd Vss Bias Condition µa (Typ) 2 to µa (Typ) 4.5 ma 6 ma ELECTROSTATIC SENSITIVE DEVICE OBSERVE HANDLING PRECAUTIONS Package Information Part Number Package Body Material Lead Finish MSL Rating Package Marking [2] [] H94A RoHS-compliant Low Stress Injection Molded Plastic % matte Sn MSL3 XXXX [] Max peak reflow temperature of 26 C [2] 4-Digit lot number XXXX For price, delivery, and to place orders: Analog Devices, Inc., One Technology Way, P.O. Box 96, Norwood, MA Phone: Order online at Application Support: Phone: -8-ANALOG-D 4

5 v.6.5 LSB GaAs MMIC 5-BIT DIGITAL ATTENUATOR, GHz Truth Table P4 P3 Control Voltage Input P2 Pin Descriptions P P.5 Attenuation State RF - RF2 High High High High High Reference I.L. High High High High Low.5 High High High Low High High High Low High High High Low High High High Low High High High High Low Low Low Low Low Any Combination of the above states will provide an attenuation approximately equal to the sum of the bits selected. Pad Number Function Description Interface Schematic Vss Negative Bias -5V 2-4, 6-3, 5-7, 9 N/C 5, 4 RF, RF2 The pins are not connected internally; however, all data shown herein was measured with these pins connected to RF/DC ground externally. These pins are DC coupled and matched to 5 Ohm. Blocking capacitors are required if RF line potential is not equal to V. 8 Vdd Positive Bias +5V 2-24 P - P4 See truth table and control voltage table. GND Package bottom must be connected to RF/DC ground. 5 For price, delivery, and to place orders: Analog Devices, Inc., One Technology Way, P.O. Box 96, Norwood, MA Phone: Order online at Application Support: Phone: -8-ANALOG-D

6 v.6.5 LSB GaAs MMIC 5-BIT DIGITAL ATTENUATOR, GHz Evaluation PCB J J3 VSS GND GND C RF U VDD P P P2 P3 P4 C2 RF2 J2 THRU CAL J4 J List of Materials for Evaluation PCB EVHMC94ALP4 [] Item Description J, J2, J4, J5 2.9 mm PC Mount RF Connector J3 DC Connector C, C2 pf Capacitor, 42 Pkg. U PCB [2] Digital Attenuator 399 Evaluation Board [] Reference this number when ordering complete evaluation PCB [2] Circuit Board Material: Rogers 435 The circuit board used in the application should use RF circuit design techniques. Signal lines should have 5 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 shown is available from Analog Devices upon request. For price, delivery, and to place orders: Analog Devices, Inc., One Technology Way, P.O. Box 96, Norwood, MA Phone: Order online at Application Support: Phone: -8-ANALOG-D 6