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| SI4730-D50 Datasheet, PDF (16/34 Pages) Silicon Laboratories – BROADCAST AM/FM RADIO RECEIVER | |||
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Si4730/31-D50
2. Typical Application Schematic
Optional: Digital Audio Out
OPMODE: 0xB0, 0xB5
GPO1
GPO2/INT
FM Antenna
C2
L1
C3
1 NC
DOUT 15
2 FMI
LOUT 14
Si473x 3 RFGND
ROUT 13
4 AMI
D50
GND 12
5 RSTB
VA 11
RSTB
Optional: AM Air Loop Antenna
L2
C9
R3
R2
R1
GPO3/DCLK
DFS
DOUT
LOUT
ROUT
2.7 to 5.5 V
VA
C1
1.62 to 3.6 V
VD
C4
RCLK
SDIO
SCLK
SENB
GPO3
T1 1
C3
AMI
X1
C5
3
RFGND
RCLK
C6
Optional: For Crystal OSC
Notes:
1. Place C1 close to VA 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 âAN383: Si47xx Antenna, Schematic,
Layout, and Design Guidelines.â 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 Si4730/31 as close as possible to antenna and keep the FMI and AMI traces as short as possible.
16
Rev. 1.0
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