Si4720-A10-GM Silicon Laboratories Inc, Si4720-A10-GM Datasheet - Page 22

• Manufacturer Part Number: Si4720-A10-GM
• Description: RF Transceiver Broadcast FM Radio Transceiver
• Manufacturer: Silicon Laboratories Inc

Specifications of Si4720-A10-GM

• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Si4720/21-B20
4. Universal AM/FM RX/FM TX Application Schematic
Figure 13 shows an application schematic that supports the Si47xx family of 3 mm x 3 mm QFN products,
including the Si4702/3/4/5 FM receivers, Si471x FM transmitters, Si472x FM transceivers, and Si473x AM/FM
receivers.
Following the schematic and layout recommendations detailed in “AN383:
Guidelines
AM/FM RX/FM TX Application Schematic”. System components are those that are likely to be present for any tuner
or transmitter design.
22
System Component
D3
J1
” will result in optimal performance with the minimal application schematic shown in Figure 13. “Universal
L
HP Jack
HEADPHONE
270 nH
System Component
System Component
D5
D4
R 2
S 1
T 5
Figure 13. Universal AM/FM RX/FM TX Application Schematic
RCLK
SCLK
SDIO
RST
SEN
V
IO
FM Embedded RX/TX Antenna
1 nF
Audio
C4
Right
R14
0 Ω
AM Ferrite Antenna
L
600 uH
FERRITE
Audio
180–
Left
10 nH
120 nH
L
GPIO2
GPIO3
GPIO1
L1
SHORT
470 nF
C16
2.5 kΩ @ 100 MHz
2.5 kΩ @ 100 MHz
3.3pF/0 Ω
C17/R21
FB1
FB2
2 kΩ
R16
Rev. 1.0
1
2
3
4
5
NC
FMI
RFGND
TXO/AMI
RST
Headphone Amplifier
System Component
Si47xx
U2
U1
GND/RIN/DOUT
LOUT/DFS
ROUT/DIN
Universal Antenna Selection and Layout
GND
V
DD
15
14
13
12
11
Si4702/03: Populate R12, R13, R21, C14, and C15
Si4704/05/1x/2x/3x Analog: Populate C7, C8, C14
and C15 as shown
Si4704/05/1x/2x/3x Digital: Populate R16, R17,
R18, R19, and R20 as shown
C1
22 nF
VBATTERY
2.7 to 5.5 V
R13
R12
0 Ω
0 Ω
0.39 uF/ 0 Ω
0.39 uF/ 600 Ω
C15/R20
0.39 uF/ 2 kΩ
0.39 uF/ 0 Ω
C8/R18
VBATTERY
2.7 to 5.5 V
C7/R17
C14/R19
System Components
LIN
RIN