Si4720-A10-GM Silicon Laboratories Inc, Si4720-A10-GM Datasheet - Page 20

• 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
3. Typical Application Schematic
3.1. Analog Audio Inputs/Outputs
3.2. Typical Application Bill of Materials
20
Component(s)
C2, C3
C4, C5
C1
U1
L1
X1
Notes:
1. Si4720/21 is shown configured in I
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
4. LIN, RIN line inputs must be ac-coupled.
5. Dedicated RX antenna at FMI input optional.
TX/RX Antenna
“AN383: 3 mm x 3 mm QFN Universal Layout Guide.”
Silicon Laboratories will evaluate schematics and layouts for qualified customers.
RCLK
SCLK
1.5 to 3.6 V
SDIO
RX Antenna
RST
SEN
120 nH
Figure 11. Analog Audio Inputs/Outputs (L
V
32.768 kHz crystal (Optional: for crystal oscillator option)
IO
L1
Table 15. Si4720/21 Typical Application Bill of Materials
Supply bypass capacitor, 22 nF, 20%, Z5U/X7R
Crystal load capacitors, 22 pF, ±5%, COG
(Optional: for crystal oscillator option)
Si4720/21 FM Radio Transceiver
AC Coupling Capacitor, 0.47 µF
120 nH inductor, Qmin = 30
1
2
3
4
5
NC
FMI
RFGND
TXO
RST
Value/Description
2
C compatible bus mode.
V
Si4720/21
IO
Rev. 1.0
U1
ROUT
LOUT
GND
RIN
IN
V
0.47 µF
DD
, R
C2
15
14
13
12
11
IN
C3
, L
0.47 µF
OUT
C4
C1
22 nF
, R
Silicon Laboratories
X1
OUT
LOUT
ROUT
Supplier(s)
C5
)
Murata
Murata
Murata
Venkel
Epson
RCLK
VBATTERY
2.7 to 5.5 V
LIN
RIN