RF112 datasheet(43/45 Pages) NXP

43 / 45 page

6.2 PCB design

To achieve the required performance the PCB design must fulfill the requirements listed

in below table.

Table 15. PCB trace requirements

Pin name

PCB trace requirement

TX_HB_OUT

50 Ω transmission line

TX_LB_OUT

50 Ω transmission line

VDD_TRX2

Maximum trace length until all three traces are joined < 1mm.

All three traces must be matched

Maximum trace/via distance to decoupling capacitor < 1mm for the small decoupling

capacitor, <5mm for the large decoupling capacitor.

RX1_HB_IN

50 Ω transmission line

RX1_LB_IN

50 Ω transmission line

RX2_HB_IN

50 Ω transmission line

RX2_LB_IN

50 Ω transmission line

RO1_HB_IN

50 Ω transmission line

RO1_LB_IN

50 Ω transmission line

RO2_HB_IN

50 Ω transmission line

VDD_RX1

Maximum trace/via distance to decoupling capacitor < 1mm for the small decoupling

capacitor, <5mm for the large decoupling capacitor.

VDD_RO1

Maximum trace/via distance to decoupling capacitor < 1mm for the small decoupling

capacitor, <5mm for the large decoupling capacitor.

VDD_RO2

Maximum trace/via distance to decoupling capacitor < 1mm for the small decoupling

capacitor, <5mm for the large decoupling capacitor.

VDD_BB1

Maximum trace/via distance to decoupling capacitor < 1mm for the small decoupling

capacitor, <5mm for the large decoupling capacitor.

VDD_BB2

Maximum trace/via distance to decoupling capacitor < 1mm for the small decoupling

capacitor, <5mm for the large decoupling capacitor.

Place crystal close to XI and XO ports.

VDD_XO

Maximum trace/via distance to decoupling capacitor < 1mm for the small decoupling

capacitor, <5mm for the large decoupling capacitor.

VDD_SYNTH

Maximum trace/via distance to decoupling capacitor < 1mm for the small decoupling

capacitor, <5mm for the large decoupling capacitor.

VDD_160M_IO

Maximum trace/via distance to decoupling capacitor < 1mm for the small decoupling

capacitor, <5mm for the large decoupling capacitor.

VDD_DIG_CORE

Maximum trace/via distance to decoupling capacitor < 1mm for the small decoupling

capacitor, <5mm for the large decoupling capacitor.

VDD_DIG_IO

Maximum trace/via distance to decoupling capacitor < 1mm for the small decoupling

capacitor, <5mm for the large decoupling capacitor.

Application

RF112 Transceiver Data Sheet, Rev. 1 Draft B, 05/2024

NXP Semiconductors

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