HMC498LC4 v05.0418 GaAs PHEMT MEDIUMPOWER AMPLIFIER, 17 - 24 GHzEvaluation PCB T M S - S R IE LIF P M R A E W O R & P A E LIN List of Materials for Evaluation PCB 108537 [1] Item Description The circuit board used in this application should use J1, J2 2.92 mm PC mount K-connector RF circuit design techniques. Signal lines should have 50 Ohm impedance while the package ground J3 - J8 DC Pin leads and exposed paddle should be connected C1 - C4 100 pF capacitor, 0402 pkg. directly to the ground plane similar to that shown. C5 - C8 1,000 pF Capacitor, 0603 pkg. A sufficient number of via holes should be used to C9 - C12 2.2µF Capacitor, Tantalum connect the top and bottom ground planes. The U1 HMC498LC4 Amplifier evaluation board should be mounted to an appro- PCB [2] 108535 Evaluation PCB priate heat sink. The evaluation circuit board shown [1] Reference this number when ordering complete evaluation PCB is available from Analog Devices, upon request. [2] Circuit Board Material: Rogers 4350. For price, delivery, and to place orders: Analog Devices, Inc., One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106 Phone: 781-329-4700 • Order online at www.analog.com Application Support: Phone: 1-800-ANALOG-D 6