UM-B-074
DA1468x Range Extender Daughterboard
User Manual
Revision 1.1
17-Apr-2018
CFR0012
2 of 60
© 2018 Dialog Semiconductor
Contents
Abstract ................................................................................................................................................ 1
Contents ............................................................................................................................................... 2
Figures .................................................................................................................................................. 3
Tables ................................................................................................................................................... 4
1
Terms and Definitions ................................................................................................................... 5
2
References ..................................................................................................................................... 5
3
Introduction.................................................................................................................................... 6
4
System Overview ........................................................................................................................... 7
4.1
Features ................................................................................................................................ 7
4.2
System Description ............................................................................................................... 8
4.3
System Interface ................................................................................................................... 8
5
Power ............................................................................................................................................ 11
6
Bluetooth Low Energy SoC ........................................................................................................ 12
7
RF Front End ................................................................................................................................ 14
7.1.1
Control Signals .................................................................................................... 14
7.1.2
GPIO Setup ......................................................................................................... 16
7.1.3
Power Amplifier .................................................................................................... 17
7.1.3.1
Power Modes ................................................................................... 19
7.1.3.2
Power Supply ................................................................................... 20
7.1.4
Transmit (TX) Path .............................................................................................. 20
7.1.5
Receive (RX) Path ............................................................................................... 21
7.1.6
Filtering (Optional) ............................................................................................... 21
7.1.7
Antenna................................................................................................................ 22
7.1.8
Resistive Attenuator (Optional) ............................................................................ 23
8
Crystals ........................................................................................................................................ 24
9
QSPI Flash Memory ..................................................................................................................... 24
10
TX Output Power Control Circuit ............................................................................................... 24
11
Reference Design Pin Assignment ............................................................................................ 25
12
Development Mode - Peripheral Pin Mapping .......................................................................... 27
13
PCB Assembly ............................................................................................................................. 28
13.1
DA14681 Range Extender Schematic ................................................................................ 29
13.2
SKY66112-11 Front End Module Schematic ...................................................................... 30
13.3
Bill of Materials .................................................................................................................... 31
14
Application Software Guide: ble_external_host ...................................................................... 33
15
BLE Measurements ..................................................................................................................... 37
15.1
Basic Performance Measurements ..................................................................................... 37
15.1.1
Receiver Sensitivity ............................................................................................. 38
15.1.1.1
Test Description ............................................................................... 38
15.1.1.2
Test Setup ....................................................................................... 38
15.1.1.3
Test Results ..................................................................................... 38
15.1.2
Transmitter Output Power.................................................................................... 40
15.1.2.1
Test Description ............................................................................... 40
