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CC3120
SWAS034 – FEBRUARY 2017
6.1.2 Typical Application Schematic—CC3120R Preregulated, 1.85-V Mode
Figure 6-2 shows the typical application schematic using the CC3120R in preregulated, 1.85-V mode of operation. For addition information on this
mode of operation please contact your TI representative.
1.85V
C10
10µF
GND
1.85V
GND
Optional:
Consider adding extra decoupling
capacitors if the battery cannot source
the peak currents.
1.85V
C2
100µF
C3
100µF
GND
GND
1.85V
#37
#39
#44 #54 #10
C4
4.7µF
C5
4.7µF
C6
4.7µF
C7
0.1µF
C8
0.1µF
GND
GND
GND
GND GND
U2
FL1
1 _IN
OUT ³
50 Ohm
GND ²
GND ⁴
1.85V
Antenna match. Pi
network might be
required depending on
E1
type of antenna.
L1
3.3nH
C1
0.5pF GNDGND
R2
100k
R1
10k
C9
0.1µF
GND
GND
U1
8 _VCC
1 _CS
6
5
SCLK
SI/SIO0
2 _SO/SIO1
3 _WP/SIO2
7 _RESET/SIO3
GND
GND ⁴
C11
0.1µF
C13 C12
22µF 1µF
C14
0.1µF
C15
0.1µF
GND
GND GND GND GND
VBA T_CC
48 _{VDD_ANA1}
47 _{VDD_ANA2}
33 _{VDD_PA_IN}
9 _{VDD_DIG1}
56
24
VDD_DIG2
VDD_PLL
49 _{VDD_RAM}
37 _{VIN_DCDC_ANA}
39 _{VIN_DCDC_PA}
44
10
VIN_DCDC_DIG
VIN_IO1
54 _{VIN_IO2}
38 _{DCDC_ANA_SW}
36
25
LDO_IN1
LDO_IN2
C16
0.1µF
C17
0.1µF
40 _{DCDC_PA_SW_P}
41 _{DCDC_PA_SW_N}
42 _{DCDC_PA_OUT}
L2
GND
C21
GND
C18
0.1µF
C19
0.1µF
C20 2.2uH
10µF
43 _{DCDC_DIG_ SW}
45 _{DCDC_ANA2_SW_P}
46 _{DCDC_ANA2_SW_N}
10pF
C22
10pF
Y1
32.768kHz
VBAT_CC
J1
2
4
6
1.85V
R11
100k
GND GND GND
1
3
5
R8
100k
R9
100k
R10
2.7K
GND
52 _{RTC_XTAL_N}
51 _{RTC_XTAL_P}
35 _SOP0
34 _SOP1
21 _{SOP2/TCXO_EN}
32 _RESET
3 _RESERVED
19 _RESERVED
29 _RESERVED
30 _RESERVED
CC3120RNMARGKR
R12
100k
RF_BG
FLASH_SPI_CLK
FLASH _SPI_CS
FLASH _SPI_MISO
FLASH_SPI_MOSI
31
11 SFL_CLK
14 SFL_CS
13 SFL_MISO
12 SFL_MOSI
UART1_CTS ⁶¹
UART1_RTS ⁵⁰
UART1_TX ⁵⁵
UART1_RX ⁵⁷
1.85V
CC_UART1_CTS
CC_UART1_RTS
CC_UART1_TX
CC_UART1_RX
R3
100k
R4
100k
GND
CC_UART1_CTS
CC_UART1_RTS
CC_UART1_TX
CC_UART1_RX
Flash Programming / Host
Control
TEST_58 ⁵⁸
TEST_59 ⁵⁹
TEST_60
TEST_62
60
62
CC_WLRS232_TX
TP1
CC_WLRS232_RX
TP2
CC_WL_UART_TX TP3
CC_NWP_UART_TX TP4
R5 R62 is needed only if
100k UART is used as host
interface.
NC ⁴
GND
HOST_SPI_CLK ⁵
HOST_SPI_CS
HOST_SPI_MISO
8
7
HOST_SPI_MOSI ⁶
HOST_INTR ¹⁵
HIB ²
WLAN_XTAL_P ²³
WLAN_XTAL_N ²²
NC
NC
1
16
NC ¹⁷
NC ¹⁸
NC ²⁰
NC
NC
26
27
NC
NC
28
53
NC ⁶³
NC ⁶⁴
PAD ⁶⁵
GND
CC_SPI_CLK
CC_SPI_CS
CC_SPI_DOUT
CC_SPI_DIN
CC_IRQ
CC_nHIB
R7
100k
CC_SPI_CLK
CC_SPI_CS
CC_SPI_DOUT
CC_SPI_DIN
CC_IRQ
CC_nHIB
HOST INTERFACE
(Ensure the nHIB line does
not float at any time.)
R6
100k
GND
GND
C23
6.2pF
Y2
40 MHz
C24
6.2pF
GND
GND
GND
C25
0.1µF
GND
GND
Copyright © 2017, Texas Instruments Incorporated
Figure 6-2. CC3120R Preregulated 1.85-V Mode Application Circuit
Copyright © 2017, Texas Instruments Incorporated
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Applications, Implementation, and Layout
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