Si4734/35-C40
18 Rev. 1.0
3. Typical Application Schematic (SSOP)
Notes:
1. Place C1 close to V
DD
and DBYP pins.
2. All grounds connect directly to GND plane on PCB.
3. Pins 6 and 7 are no connects, leave floating.
4. Pins 10 and 11 are unused. Tie these pins to GND.
5. 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.
6. Pin 8 connects to the FM antenna interface, and pin 12 connects to the AM antenna interface.
7. Place Si4734/35 as close as possible to antenna and keep the FMI and AMI traces as short as possible.
1
2
3
4
5
6
7
8
9
10
11
12
DOUT
C2 C3
X1
RCLK
GPIO3
Optional: for crystal oscillator option
DFS
24
23
22
21
20
19
18
17
16
15
14
13
R1
R2
R3
GPO3/DCLK
Optional: Digital Audio Output
GPO2/INT
GPO1
NC
NC
FMI
C5
L1
NC
NC
RST
SEN
SCLK
SDIO
1.85 to 3.6 V
2.0 to 5.5 V
DBYP
RCLK
ROUT
LOUT
GND
RFGND
VDD
VIO
AMI
C1
L2
C4
C4