CC113LRGP datasheet(70/87 Pages) TI2

70 / 87 page

Antenna

(50

)

1.8 V - 3.6 V

Power Supply

1 SCLK

2 SO

(GDO1)

3 GDO2

4 DVDD

5 DCOUPL

AVDD 15

AVDD 14

RF_N 13

RF_P 12

AVDD 11

XTAL

C126

R171

C81

C101

C51

CSn

GDO0 (optional)

GDO2 (optional)

SCLK

DIE ATTACH PAD:

C131

C122

L122

L132

C124

SO (GDO1)

CC113L

SWRS108B – MAY 2011 – REVISED JUNE 2014

www.ti.com

Applications, Implementation, and Layout

Figure 5-1 shows the low cost CC113LEM application circuit (see SWRR083 and SWRR084) (see

Table 6-1 for component values).

The designs in SWRR046 and SWRR045 were used for CC113L characterization. The application circuits

are shown in Figure 6-2 and Figure 6-3 (see Table 6-1 for component values).

6.1

Bias Resistor

The 56-k

Ω bias resistor R171 is used to set an accurate bias current.

6.2

Balun and RF Matching

The balun component values and their placement are important to keep the performance optimized.

Gerber files and schematics for the reference designs are available for download from the TI website.

6.2.1

Balun and RF Matching (Low-Cost Application Circuit)

The components between the RF_N/RF_P pins and the point where the two signals are joined together

(C131, C122, L122, and L132, see Figure 6-1) form a balun that converts singleended RF signal at the

antenna to a differential RF signal on CC113L. C124 is needed for DC blocking.

The balun components also matches the CC113L input impedance to a 50-

Ω source. C126 provides DC

blocking and is only needed if there is a DC path in the antenna.

Figure 6-1. Low Cost Application Circuit and Evaluation Circuit 315, 433, 868, or 915 MHz (Excluding

Supply Decoupling Capacitors)

Applications, Implementation, and Layout

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CC113LRGP Datasheet(PDF) 70 Page - Texas Instruments

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