SI4712-B30-GM Silicon Laboratories Inc, SI4712-B30-GM Datasheet - Page 19

• Manufacturer Part Number: SI4712-B30-GM
• Description: IC TX FM RADIO W/RPS 20UQFN
• Manufacturer: Silicon Laboratories Inc

Specifications of SI4712-B30-GM

• Frequency: 76MHz ~ 108MHz
• Applications: General Purpose
• Modulation Or Protocol: FM
• Current - Transmitting: 18.8mA
• Data Interface: PCB, Surface Mount
• Antenna Connector: PCB, Surface Mount
• Voltage - Supply: 2.7 V ~ 5.5 V
• Operating Temperature: -20°C ~ 85°C
• Package / Case: 20-UQFN, 20-µQFN
• Operating Supply Voltage (typ): 3.3/5V
• Operating Supply Voltage (min): 2.7V
• Operating Supply Voltage (max): 5.5V
• Operating Temp Range: -20C to 85C
• Operating Temperature Classification: Commercial
• Mounting: Surface Mount
• Pin Count: 20
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Features: -
• Power - Output: -
• Memory Size: -
• Data Rate - Maximum: -
• Lead Free Status / Rohs Status: Supplier Unconfirmed

4.1. Universal AM/FM RX/FM TX Bill of Materials
The bill of materials for the expanded application schematic shown in Figure 12 is provided in Table 14. Refer to
the individual device layout guides and antenna interface guides for a discussion of the purpose of each
component.
R12, R13, R19,
LHEADPHONE Headphone antenna matching inductor, 270 nH, 0603, Q>15, Murata
R1,R2,R3,R4 Headphone amp feedback/gain resistor, 20 kΩ, 0402
Designator
LFERRITE
R20, R21
C12, C13
C14, C15
R16, R17
LSHORT
FB1,FB2
C9, C10
R7-R11
C5, C6
C7, C8
R5, R6
D1-D5
C16
R14
C11
R18
C17
C1
U1
C2
C3
C4
U2
X1
L1
Supply bypass capacitor, 22 nF, 10%, Z5U/X7R, 0402
Silicon Laboratories Si47xx, 3 mm x 3 mm, 20 pin, QFN
0 Ω jumper, 0402
AM antenna ac coupling capacitor, 470 nF, 20%, Z5U/X7R
AM Ferrite loop stick, 180–600 µH
Ferrite bead, 2.5 kΩ @ 100 MHZ, 0603, Murata BLM18BD252SN1D
LQW18ANR27J00D
Embedded antenna matching inductor, 120 nH, 0603, Q>30, Murata
LQW18ANR12J00D
Embedded antenna jumper, 2.2 Ω, 0402
Supply bypass capacitor, 22 nF, 10%, Z5U/X7R, 0402
Supply bypass capacitor, 100 nF, 10%, Z5U/X7R, 0402
Headphone amp output shunt capacitor, 100 pF, 10%, Z5U/X7R, 0402 Optional
Current limiting resistor, 20 Ω–2 kΩ, 0402
Crystal load capacitor, 22 pF, 5%, COG
Crystal, Epson FC-135
Si47xx input ac coupling capacitor, 0.39 µF, X7R/X5R, 0402
ESD Diode, SOT23-3, California Micro Devices CM1214-01ST
Supply bypass capacitor, 100 nF, 10%, Z5U/X7R, 0402
Headphone antenna ac coupling capacitor, 1 nF, 10%, Z5U/X7R, 0402 Headphone Antenna
Headphone amp output ac coupling capacitor, 125 uF, X7R, 0805
Headphone amp input ac coupling capacitor, 0.39 µF, X7R/X5R, 0402 Headphone Amplifier
Headphone amp bleed resistor, 100 kΩ, 0402
Headphone amplifier, National Semiconductor, LM4910MA
Current limiting resistor, 2 kΩ, 0402
Current limiting resistor, 600 Ω, 0402
VCO filter inductor, 10 nH, 0603, Q>30, Murata, LQW18ANR01J00D
VCO filter capacitor, 3.3 pF, 0402, COG, Venkel,
C0402COG2503R3JN
Table 14. Universal AM/FM RX/FM TX Bill of Materials
Description
Rev. 1.1
Si4712/13-B30
R12, R13, and R21 for
Si4702/03 Only
AM Ferrite Antenna
AM Ferrite Antenna
Headphone Antenna
Headphone Antenna
Embedded Antenna
Optional
Optional
Optional
Optional
Optional
Optional
System Component
System Component
Headphone Amplifier
Headphone Amplifier
Headphone Amplifier
Headphone Amplifier
Headphone Amplifier
System Component
System Component
Optional
Optional
Note
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