Si4730/31/34/35-D60
2. Typical Application Schematic
2.1. QFN Typical Application Schematic
Optional: Digital Audio Out
OPMODE: 0xB0, 0xB5
16
15
C7
C8
DFS
RIN
LIN
DOUT
R3
R2
R1
17
14
13
GP03/DCLK
LOUT
ROUT
DCLK
DFS
C9
GPO1
GPO2/INT
DOUT
R3
R2
R1
GPO3/DCLK
DFS
Si473x
C9
Optional: AUXIN/Digital Audio Out
OPMODE: 0x5B, 0x0B
DOUT
1
2
3
4
5
15
NC
DOUT
C2
14
FM Antenna
FMI
LOUT
LOUT
13
RFGND
AMI
ROUT
ROUT
Si473x
12
L1
GND
D60
2.7 to 5.5 V
C1
C3
11
RSTB
VA
VA
1.62 to 3.6 V
C4
VD
RSTB
RCLK
SDIO
SCLK
SENB
Optional: AM Air Loop Antenna
L2
GPO3
RCLK
T1
C3
1
3
X1
AMI
C6
C5
RFGND
Optional: For Crystal OSC
Notes:
1. Place C1 close to VA pin and C4 close to VD pin.
2. All grounds connect directly to GND plane on PCB.
3. Pins 1 and 20 are no connects, leave floating.
4. To ensure proper operation and receiver performance, follow the guidelines in “AN383: Si47xx Antenna, Schematic,
Layout, and Design Guidelines.” Silicon Laboratories will evaluate schematics and layouts for qualified customers.
5. Pin 2 connects to the FM antenna interface, and pin 4 connects to the AM antenna interface.
6. Place Si473x-D60 as close as possible to antenna and keep the FMI and AMI traces as short as possible.
20
Rev. 1.1
SILICON [ SILICON ]
