si4835-b30-gu Silicon Laboratories, si4835-b30-gu Datasheet - Page 8

• Manufacturer Part Number: si4835-b30-gu
• Description: Broadcast Mechanical Tuning Am/fm/sw Radio Receiver
• Manufacturer: Silicon Laboratories

Si4831/35-B30
2. Typical Application Schematic
Notes:
8
1. Place C
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,
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.
Layout, and Design Guidelines." Silicon Labs will evaluate the schematics and layouts for qualified customers.
ANT2
4
FMI
close to V
Optional: AM air loop antenna
T1
DD2
and DBYP pins.
0.47u
C
RFGND
5
(Si4835 only)
AMI
0.47u
C5
100k
AMI
R1
C1
0.1u
Rev. 1.0
C3
22p
32.768KHz
Optional
C2
22p
Y1
0.1u
C4
10k
100k
R2
VR1
U1
BAND
STATION_LED
STEREO_LED
TUNE1
1
S2
2
3
VDD
VDD
AM
FM
2.0 TO 3.6V
2.0 TO 3.6V
LOUT
ROUT
253k
180k
67k
R3
R4
R5