SI4712-B30-GM Silicon Laboratories Inc, SI4712-B30-GM Datasheet - Page 20

• 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

Si4712/13-B30
5. Functional Description
5.1. Overview
The Si4712/13 is the first 100% CMOS FM radio
transmitter with integrated receive functionality to
measure received signal strength. The device leverages
Silicon Labs’ highly successful and proven Si4700/01
FM receiver patent family and offers unmatched
integration and performance, allowing FM transmit to be
added to any portable device with a single chip. The
Si4712/13 offers industry-leading size, performance,
low power consumption, flexibility, and ease of use.
The Si4712/13’s digital integration reduces the required
external components of traditional offerings, resulting in
a solution requiring only an external inductor and
bypass capacitor, and PCB space of approximately
15 mm
simplifies the design and manufacturing for companies
adopting this technology.
The Si4712/13’s integrated receive power scan function
shares the same antenna as the transmitter allowing for
a compact printed circuit board design. The device
operates in half duplex mode, meaning the transmitter
and receiver do not operate at the same time.
The Si4712/13 performs FM modulation in the digital
domain to achieve high fidelity, optimal performance
versus power consumption, and flexibility of design. The
20
2
. This increases the device reliability and
Ant
Tx
120 nH
L1
RFGND
TXO
AFC
Figure 13. Functional Block Diagram
DETECT
INTERFACE
PEAK
DAC
DAC
CONTROL
Rev. 1.1
onboard DSP provides modulation adjustment and
audio dynamic range control for optimum sound quality.
The Si4713 supports the European Radio Data System
(RDS) and the US Radio Broadcast Data System
(RBDS) including all the symbol encoding, block
synchronization, and error correction functions. Using
this feature, the Si4713 enables data such as artist
name and song title to be transmitted to an RDS/RBDS
receiver.
The transmit output (TXO) connects directly to the
transmit antenna with only one external inductor to
provide harmonic filtering. The output is programmable
over a 10 dB voltage range in 1 dB steps. The TXO
output pin can also be configured for loop antenna
support. Users are responsible for complying with local
regulations on RF transmission (FCC, ETSI, ARIB,
etc.).
The digital audio interface operates in slave mode and
supports a variety of MSB-first audio data formats
including I
three pins: digital data input (DIN), digital frame
synchronization
synchronization input clock (DCLK). The Si4712/13
supports a number of industry-standard sampling rates
DSP
RDS (Si4713)
GPO
2
DIGITAL
S and left-justified modes. The interface has
AUDIO
ADC
ADC
Si4712/13
input
LDO
(DFS),
DIN
DFS
LIN
RIN
VDD
GND
22 nF
C1
2.7–5.5 V
and
a
digital
bit