User's Manual

UM-B-045
DA14580 Range extender v.2 reference application
Company confidential
User manual
Revision 1.1
14-September-2015
CFR0012-00 Rev 1
13 of 60
© 2015 Dialog Semiconductor
RF front end 4.4
This part of the design is implementing the amplification of the RF transmitted signal while the
transmitted harmonics as well as the Tx spurious emissions remain within the FCC/ETSI
specification.
The operation of the RF front end is controlled by the DA14580. There are two RF paths: one
through the amplifier and one bypass path. The amplifier path is enabled during transmission. The
RF signal passes through the PA, the low pass filter and the RF matching network. In the bypass
path, the RF signal received at the antenna is driven directly to the BLE transceiver.
DA14580
QFN40
BTLE SoC
Low Pass
Filter
Matching
circuit
Amplifier
SKY66111-11
Amplifier bypass path
Power Amplifier Path
RFIOP
Figure 5: RF front end signal paths