User's Manual

UM-B-036
DA14580 Antenna module for QFN48 package
User manual
Revision 2.0
10
-
Dec
-
2014
CFR0012-00 Rev 1 4 of 34 © 2014
Dialog Semiconductor
Figures
Figure 1: Antenna module block diagram ............................................................................................. 8
Figure 2: Schematic diagram of the DA14580 QFN48 antenna module ............................................... 9
Figure 3: Module pin locations ............................................................................................................ 10
Figure 4: Power management, DC/DC converter in buck configuration ............................................. 12
Figure 5: Current consumption during an Advertising frame ............................................................. 12
Figure 6: DA14580 DC/DC converter circuit ........................................................................................ 13
Figure 7: RF section: PCB layout (left) and schematic (right) .............................................................. 14
Figure 8: Antenna geometry ............................................................................................................... 15
Figure 9: Matching network: R5 (5.1 nH) and R6 (3.9 nH) .................................................................. 15
Figure 10: Antenna VSWR measurements .......................................................................................... 16
Figure 11: Far field antenna directivity @ 2.44 GHz ........................................................................... 16
Figure 12: Radiation diagram for the module placed vertically on the long edge .............................. 17
Figure 13: Radiation diagram for the module placed horizontally ..................................................... 17
Figure 14: Interposer (078-46-A) for the QFN48 antenna module ..................................................... 18
Figure 15: Top view (left) and bottom view (right) of PCBA ............................................................... 19
Figure 16: Schematic of the DA14580 QFN48 antenna module ......................................................... 20
Figure 17: Test setup for the conducted RF measurements ............................................................... 22
Figure 18: Conducted output power per channel ............................................................................... 24
Figure 19: Supply current during an Advertising frame ...................................................................... 25
Figure 20: Supply current during periodic transmissions every 700 ms ............................................. 25
Figure 21: Supply current during Extended Sleep mode ..................................................................... 26
Tables
Table 1: QFN48 antenna module characteristics .................................................................................. 7
Table 2: Module pin assignment (top view) ........................................................................................ 10