SI4712-B30 Datasheet, PDF (16/42 Pages) Silicon Laboratories – FM RADIO TRANSMITTER WITH RECEIVE POWER SCAN

Si4712/13-B30
3. Typical Application Schematics
3.1. Analog Audio Inputs
TX Antenna
L1
120 nH
V_IO
1 _NC
2 _NC
3 _RFGND
4 _TXO
5 _RST
U1
Si4712/13
C2
0.47 µF
C3
RIN ^{15 0.47 µF}
DFS ¹⁴
DIN ¹³
GND ¹²
VDD ¹¹
C1
22 nF
LIN
RIN
VBATTERY
2.7 to 5.5 V
RST
SEN
SCLK
SDIO
RCLK
VIO
1.5 to 3.6 V
Notes:
1. Si4712/13 is shown configured in I²C compatible bus mode.
2. GPO2/INT can be configured for interrupts with the powerup command.
3. To ensure proper operation and FM transmitter performance, follow the
guidelines in “AN383: 3 mm x 3 mm QFN Universal Layout Guide.”
Silicon Laboratories will evaluate schematics and layouts for qualified customers.
4. LIN, RIN line inputs must be ac-coupled.
Figure 10. Analog Audio Inputs (LIN, RIN)
16
Rev. 1.1