SC14CVMDECT datasheet(27/57 Pages) DIALOG

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Datasheet

Revision 3.0

28-Jul-2015

CFR0011-120-00-FM Rev 5

27 of 57

SC14CVMDECT SF

Cordless Voice Module

FINAL

4.13 ANTENNA OPERATION

Figure

shows

the

internal

circuit

the

SC14CVMDECT SF. Pin RF0 is used for two external

antennas and can also be used for RF test purposes.

Therefore it is recommended to add a 10 pF capacitor

as reserve pattern, even when the two external anten-

nas are not used.

Re-certification of the SC14CVMDECT SF is required if

at least one external antenna is added. On request,

Dialog Semiconductor can provide a pre-certified PCB

layout for an external antenna circuit.

RF1 is also recommended to use and can be con-

nected to the RF cable to be able to do the JPN DECT

type approval test.

4.13.1 Internal antenna only

The FAD function is not enabled if only the internal

antenna is used. In this case pins RFP0, RFP0n, P0

and P0n must be left unconnected.

4.13.2 Internal and external antenna with FAD

Figure 28 shows one external antenna that is con-

nected to RF1 of the SC14CVMDECT SF. This config-

uration supports the FAD function. In this case pins

RFP0, RFP0n, P0 and P0n must be left unconnected.

Figure 27: Internal circuit of the SC14CVMDECT SF

RF1

TP1

RF0

P0n

RFP0n

RFP0

Figure 28: One external antenna

External

Antenna

RF1

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