SI4731-C40-GMR Silicon Laboratories Inc, SI4731-C40-GMR Datasheet - Page 17

• Manufacturer Part Number: SI4731-C40-GMR
• Description: IC RX AM/FM RADIO RDS 20UQFN
• Manufacturer: Silicon Laboratories Inc

Specifications of SI4731-C40-GMR

• Frequency: 520kHz ~ 1.71MHz, 64MHz ~ 108MHz
• Modulation Or Protocol: AM, FM
• Applications: General Purpose
• Current - Receiving: 19.9mA
• Data Interface: PCB, Surface Mount
• Antenna Connector: PCB, Surface Mount
• Features: RSSI Equipped
• Voltage - Supply: 2.7 V ~ 5.5 V
• Operating Temperature: -20°C ~ 85°C
• Package / Case: 20-UQFN, 20-µQFN
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Sensitivity: -
• Memory Size: -
• Data Rate - Maximum: -

2. Typical Application Schematic (QFN)
Notes:
1. Place C1 close to V
2. All grounds connect directly to GND plane on PCB.
3. Pins 1 and 20 are no connects, leave floating.
4. To ensure proper operation and receiver performance, follow the guidelines in “AN383: Si47xx Antenna, Schematic,
5. Pin 2 connects to the FM antenna interface, and pin 4 connects to the AM antenna interface.
6. Place Si4730/31 as close as possible to antenna and keep the FMI and AMI traces as short as possible.
AM antenna
Layout, and Design Guidelines.” Silicon Laboratories will evaluate schematics and layouts for qualified customers.
RCLK
SCLK
1.85 to 3.6 V
SDIO
RST
SEN
FMIP
VIO
L1
C5
DD
pin.
1
2
3
4
5
FMI
RFGND
AMI
RST
NC
Si4730/31-GM
U1
Rev. 1.0
ROUT/DOUT
LOUT/DFS
DOUT
GND
VDD
GPO3
15
14
13
12
11
Optional: for crystal oscillator option
R1
R2
Optional: Digital Audio Output
R3
L2
Optional: AM air loop antenna
Si4730/31-C40
C1
LOUT
ROUT
C2
T1
C5
GPO1
GPO2/INT
GPO3/DCLK
DFS
X1
DOUT
VBATTERY
2.7 to 5.5 V
C3
RFGND
RCLK
AMI
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