Si4831/35-B30

8

Rev. 1.0

2. Typical Application Schematic

Notes:

1.

2.

All grounds connect directly to GND plane on PCB.

3.

Pin 6 and 7 leave floating.

4.

To ensure proper operation and receiver performance, follow the guidelines in "AN555: Si483x-B Antenna, Schematic,

Layout, and Design Guidelines." Silicon Labs will evaluate the schematics and layouts for qualified customers.

5.

Pin 8 connects to the FM antenna interface and pin 12 connects to the AM antenna interface.

6.

Place Si483x as close as possible to antenna jack and keep the FMI and AMI traces as short as possible.

5

RFGND

Optional: AM air loop antenna

2.0 TO 3.6V

2.0 TO 3.6V

Optional

(Si4835 only)

FM

AM

BAND

Y1

32.768KHz

C2

22p

C3

22p

U1

C5

0.47u

ANT2

T1

C

0.47u

C4

0.1u

C1

0.1u

R1

100k

VR1

100k

12

3

S2

R3

253k

R4

180k

R5

67k

R2

10k

STATION_LED

STEREO_LED

FMI

LOUT

ROUT

AMI

AMI

VDD

VDD

TUNE1