CC2564MODACMOG datasheet(32/62 Pages) TI1

32 / 62 page

CC2564MODN, CC2564MODA

SWRS160D – FEBRUARY 2014 – REVISED DECEMBER 2015

www.ti.com

6.2.1.2

RF Interface Guidelines

6.2.1.2.1 RF Trace (CC2564MODN Only)

Route the RF traces on layer 1 (top) and keep the routes as short as possible. These traces must be 50-

Ω, controlled-impedance traces with reference to the solid ground in the layer 2-microstrip transmission

line. The TI reference design uses an RF trace width equal to 17 mils, which conforms to a 50

Ω-±3%

simulated result, based on the following PCB properties: (see Table 6-1 and Figure 6-4).

•

Substrate height: 10 mils

•

Substrate dielectric: 4.2

•

Trace width: 17 mils

•

Trace thickness: 1.4 mils

•

Ground clearance: 20 mils

TI recommends the following guidelines for a good RF trace design:

•

The RF traces must have via stitching on both ground planes around the RF trace (see Figure 6-4).

•

Avoid placing clock signals close to the RF path.

•

Place a u.FL connector (or similar) between the module and antenna if possible or during prototype

phases (see Figure 6-4.)

•

The RF path should look like one single path along the RF traces and matching components. See

Figure 6-5 for the good (OK) case versus the not good (NG) case.

•

The RF trace bends must be gradual with an approximate maximum bend of 45 degrees with trace

mitered. RF traces must not have sharp corners. In addition:

–

Avoid case (1) in Figure 6-6. A right angle leads to scattering and makes matching weak.

–

Case (2) in Figure 6-6 is not recommended. Even if this bend had a good 50

Ω, a careful simulation

would be required.

–

Case (3) in Figure 6-6 is recommended. The half-arc angle reduces scattering caused by a right

angle.

Figure 6-4. Placing a u.FL Connector Between the Module and Antenna

Applications, Implementation, and Layout

Submit Documentation Feedback

Product Folder Links: CC2564MODN CC2564MODA

CC2564MODACMOG Datasheet(PDF) 32 Page - Texas Instruments

CC2564MODACMOG Datasheet(HTML) 32 Page - Texas Instruments

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62

Datasheet Download

Link URL