link to page 9 link to page 9 Data SheetADL5531BASIC CONNECTIONS The basic connections for operating the ADL5531 are shown 2.03mm in Figure 16. The input and output are ac-coupled with 10 nF 18 (0402) capacitors. DC bias is provided to the amplifier via an inductor (Coilcraft 1008CS-471XJLC or equivalent) connected to the RFOUT pin. The bias voltage should be decoupled using 5mm85mm78mm 10 nF and 1 μF capacitors. 0.1.1.SOLDERING INFORMATION AND RECOMMENDED45PCB LAND PATTERN1.53mm 015 Figure 15 shows the recommended land pattern for ADL5531. 0.71mm 06833- To minimize thermal impedance, the exposed pad on the Figure 15. Recommended Land Pattern package underside is soldered down to a ground plane. If multiple ground layers exist, they are stitched together using vias (a minimum of five vias is recommended). Pin 1, Pin 3, Pin 4, Pin 6, and Pin 8 can be left unconnected or can be connected to ground. Connecting these pins to ground slightly enhances thermal impedance. For more information on land pattern design and layout, refer to AN-772 Application Note, A Design and Manufacturing Guide for the Lead Frame Chip Scale Package (LFCSP). VPOS(TESTLOOP RED)L1C5C6470nH10nF1µFW1GND(TESTLOOP BLACK)ADL55311 NCNC 8RFINRFOUTC1C22 RFINRFOUT 710nF10nF3 NCNC 64 NCCLIN 5C31nF 014 NC = NO CONNECT 06833- Figure 16. Basic Connections Rev. C | Page 9 of 12 Document Outline FEATURES FUNCTIONAL BLOCK DIAGRAM GENERAL DESCRIPTION REVISION HISTORY SPECIFICATIONS TYPICAL SCATTERING PARAMETERS ABSOLUTE MAXIMUM RATINGS ESD CAUTION PIN CONFIGURATION AND FUNCTION DESCRIPTIONS TYPICAL PERFORMANCE CHARACTERISTICS BASIC CONNECTIONS SOLDERING INFORMATION AND RECOMMENDED PCB LAND PATTERN EVALUATION BOARD OUTLINE DIMENSIONS ORDERING GUIDE