CC2640R2FYFVT.B datasheet(43/74 Pages) TI2

43 / 74 page

10 Application, Implementation, and Layout

Note

Information in the following applications sections is not part of the TI component specification, and TI

does not warrant its accuracy or completeness. TI's customers are responsible for determining

suitability of components for their purposes. Customers should validate and test their design

implementation to confirm system functionality.

10.1 Application Information

Very few external components are required for the operation of the CC2640R2F device. This section provides

some general information about the various configuration options when using the CC2640R2F in an application,

and then shows two examples of application circuits with schematics and layout. This is only a small selection of

the many application circuit examples available as complete reference designs from the product folder on

www.ti.com.

Figure 10-1 shows the various RF front-end configuration options. The RF front end can be used in differential-

or single-ended configurations with the options of having internal or external biasing. These options allow for

various trade-offs between cost, board space, and RF performance. Differential operation with external bias

gives the best performance while single-ended operation with internal bias gives the least amount of external

components and the lowest power consumption. Reference designs exist for each of these options.

Antenna

(50 Ohm)

1 pF

2.4 nH

2.4±2.7 nH

6.8 pF

6.2±6.8 nH

Antenna

(50 Ohm)

1.2 pF

15 nH

2 nH

1.2 pF

Antenna

(50 Ohm)

1.2 pF

2 nH

1.2 pF

Antenna

(50 Ohm)

1.2 pF

2 nH

1.2 pF

Pin 1 (RF P)

Pin 2 (RF N)

Pin 3 (RXTX)

Pin 1 (RF P)

Pin 2 (RF N)

Pin 1 (RF P)

Pin 2 (RF N)

Red = Not necessary if internal bias is used

Differential

operation

Single ended

operation

Single ended

operation with 2

antennas

Pin 3 (RXTX)

15 nH

CC26xx

(GND exposed die

attached pad

)

Pin 3/4 (RXTX)

Pin 1 (RF P)

Pin 2 (RF N)

24MHz

XTAL

(Load caps

on chip)

10µF

10µH

Optional

inductor.

Only

needed for

DCDC

operation

12 pF

2 nH

1 pF

input

decoupling

10µF±22µF

To VDDR

pins

VDDS_DCDC

DCDC_SW

Red = Not necessary if internal bias is used

Figure 10-1. CC2640R2F Application Circuit

www.ti.com

CC2640R2F

SWRS204C – DECEMBER 2016 – REVISED SEPTEMBER 2020

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