Si4711-A20-GM Silicon Laboratories Inc, Si4711-A20-GM Datasheet - Page 19

• Manufacturer Part Number: Si4711-A20-GM
• Description: RF Transmitter Broadcast FM Radio Trns w/RDS/RBDS
• Manufacturer: Silicon Laboratories Inc

Specifications of Si4711-A20-GM

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

5. Functional Description
5.1. Overview
The Si4710/11 is the industry's first 100% CMOS FM
radio transmitter. The device leverages Silicon Labs’
highly successful and proven Si4700/01 FM receiver
and offers unmatched integration and performance
allowing FM transmit to be added to any portable device
with a single chip. As with the Si4700/01, the Si4710/11
offers industry-leading size, performance, low power
consumption, and ease of use.
The Si4710/11 are part of a family of broadcast audio
solutions offered in standard, 3 x 3 mm 20-pin QFN
packages. All solutions are layout compatible, allowing
a single PCB to accommodate various feature offerings.
The Si4710/11’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
improved
programmability are key advantages of the Si4710/11.
The Si4710/11 includes line inputs to the on-chip
analog-to-digital converters (ADC), a programmable
reference clock input, and a configurable digital audio
interface. The chip supports I
SPI, and a 3-wire control interface.
The Si4710/11 performs FM modulation in the digital
2
2.7–5.5 V
. High reliability in device manufacturing,
quality,
22 nF
C1
GND
VDD
DFS
DIN
RIN
LIN
easy
LDO
design-in,
2
C-compliant 2-wire, 8-bit
Figure 13. Functional Block Diagram
RDS ( S i4711 )
ADC
ADC
GPO
and
DIGITAL
software
AUDIO
DSP
Rev. 1.1
INTERFACE
CONTROL
domain to achieve high fidelity, optimal performance
versus power consumption, and flexibility of design. The
onboard DSP provides modulation adjustment and
audio dynamic range control for optimum sound quality.
The Si4711 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 Si4711 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 Si4710/11
DAC
DAC
2
S and left-justified modes. The interface has
input
Si471x
Si4710/11-A20
AFC
(DFS),
and
TXO
RFGND
a
digital
120 nH
L1
Tx
Ant
bit
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