DA14AVDDECT datasheet(23/25 Pages) DIALOG

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DA14AVDDECT SF01

DA14AVDDECT SF01 Datasheet

Datasheet

Revision 2.1

02-Jun-2020

CFR0011-120-00

23 of 25

Layout Guidelines

The module pinout of DA14AVDDECT has been specifically designed to accommodate easy

integration with the PCBs of customer applications without having to adding expensive PCB

components to increase the cost due to, for example, blind vias or small line/space dimensions.

All standard practice layout rules and guidelines apply. Additional special care may be paid to the

antenna and USB areas:

● The application PCB may not extend underneath the antenna area (see Figure 8)

● Signals from the application PCB containing high harmonic content (for example, clock signals or

memory buses) must be kept away from the antenna

● No metal objects should be placed in the vicinity of the antenna (see Figure 8)

● The USB data lines should be routed with 90 Ω differential impedance lines and the line lengths

must match

● Appropriate trace width and number of vias should be used for all power supply paths

● A common ground plane should be used to allow proper electrical and thermal performances

● Noise-sensitive analog signals, such as feedback lines or clock connections, should be kept

away from the traces carrying pulsed analog or digital signals. This can be achieved by

separation (distance) or by shielding the sensitive signals with quiet signals or ground traces

● Decoupling capacitors should be X5R ceramics and should be placed as near to the module as

possible

Figure 8: Keep-out Areas

It is also advised to use the HW layout of the DA14AVDDECT evaluation kit as a guideline for

customer products. This HW was used during the certification process and should be regarded as a

reference.

Please see reference document [4] for more information on the Limited Modular Approval certification

and how it can be used, so that no new radio certification needs to be obtained for the end customer

products.

DA14AVDDECT Datasheet(PDF) 23 Page - Dialog Semiconductor