CC2533_11 Datasheet, PDF (23/34 Pages) Texas Instruments – An Optimized System-on-Chip Solution for 2.4-GHz IEEE 802.15.4 Remote Control Applications

CC2533
www.ti.com
SWRS087 – JUNE 2010
Boost-Mode TX Settings
This section contains the register settings for boost-mode TX. Note that it is recommended to add two additional
components (a capacitor and an inductor) adjacent to the capacitor C253 in Figure 19 in order to reduce
third-harmonic spurious emission to simplify passing regulations. There are three do not mount pads on the EM
reference design. Two of these should be used to mount the additional components. The capacitor (0.9 pF)
should be mounted to the pad on the chip side of C253 (to the left of C253 in Figure 19). The inductor (4.3 nH)
should be mounted between C253 and the antenna on the pad closest to C253 (to the right of C253 in
Figure 19). Using this filter lowers the output power 0.12 dB when using boost-mode TX and 0.4 dB at regular full
power.
Table 3. Boost Mode TX Register Settings
Register Name
FRMCTRL0
FRMCTRL1
TXFILTCFG
FSCAL1
IVCTRL
FSCTRL
TXCTRL
TXPOWER
Value
0x43
0x00
0x09
0x00
0x0F
0xF5
0x74
0xFD
Table 4. Recommended Output Power Settings⁽¹⁾
TXPOWER Register Setting
Boost mode TX
0xEC
0xDC
0xCC
0xBC
0xAC
0x9C
0x8C
0x7C
0x6C
0x5C
0x4C
0x3C
0x2C
0x1C
0x0C
Typical Output Power (dBm)
7
4.5
3
1.7
0.3
–1
–2.8
–4.1
–5.9
–7.7
–9.9
–12.4
–14.9
–16.6
–18.7
–20.4
Typical Current Consumption (mA)
38.8
32.3
30.4
29.6
28.5
27.9
26.7
26.3
25.8
25.5
25.3
25.1
25.0
24.9
24.9
23.3
(1) Measured on Texas Instruments CC2533 EM reference design with T_A = 25°C, VDD = 3 V and f_c = 2440 MHz, unless otherwise noted.
See Table 2 for recommended register settings.
Copyright © 2010, Texas Instruments Incorporated
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