AN4169 Datasheet, PDF (1/14 Pages) STMicroelectronics – PCB design guidelines for the SPIRIT1 transceiver

AN4169
Application note
PCB design guidelines for the SPIRIT1 transceiver
By Placido De Vita
Introduction
The SPIRIT1 is a very low power RF transceiver, intended for RF wireless applications in the
sub-1 GHz band. It is designed to operate both in the license-free ISM and SRD frequency
bands at 169, 315, 433, 868 and 915 MHz.
This application note is intended to accompany the reference designs and provide detailed
information regarding the design decisions employed within STMicroelectronics designs. In
addition, it details the design guidelines for developing a generic radio frequency application
using a SPIRIT1 device.
The RF performance and the critical maximum peak voltage, spurious and harmonic
emission, receiver matching strongly depend on the PCB layout as well as the selection of
the matching network components.
For optimal performance, STMicroelectronics recommends the use of the PCB layout
design hints described in the following sections. Also, but no less importantly,
STMicroelectronics strongly suggests using the BOM defined in the reference design which
guarantees, along with a good PCB design, the correct RF performance.
For further information, visit the STMicroelectronics web site at www.st.com.
October 2012
Doc ID 023704 Rev 1
1/14
www.st.com