SI4730-C40-GMR Silicon Laboratories Inc, SI4730-C40-GMR Datasheet - Page 20

• Manufacturer Part Number: SI4730-C40-GMR
• Description: IC RX AM/FM RADIO WORLD 20UQFN
• Manufacturer: Silicon Laboratories Inc

Specifications of SI4730-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
• 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
• Features: -
• Sensitivity: -
• Memory Size: -
• Data Rate - Maximum: -

Si4730/31-C40
5. Functional Description
5.1. Overview
The Si4730/31 is the industry's first fully integrated,
100% CMOS AM/FM radio receiver IC. Offering
unmatched integration and PCB space savings, the
Si4730/31 requires only two external components and
less than 15 mm
inputs. The Si4730/31 AM/FM radio provides the space
savings and low power consumption necessary for
portable devices while delivering the high performance
and design simplicity desired for all AM/FM solutions.
Leveraging Silicon Laboratories' proven and patented
Si4700/01 FM tuner's digital low intermediate frequency
(low-IF) receiver architecture, the Si4730/31 delivers
superior RF performance and interference rejection in
both AM and FM bands. The high integration and
complete system production test simplifies design-in,
increases
manufacturability.
The Si4730/31 is a feature-rich solution that includes
advanced seek algorithms, soft mute, auto-calibrated
digital tuning, and FM stereo processing. In addition, the
Si4730/31 provides analog and digital audio outputs
and a programmable reference clock. The device
supports I
and a Si4700/01 backwards-compatible 3-wire control
interface.
20
2
C-compatible 2-wire control interface, SPI,
system
2.0– 5.5 V (SSOP)
2.7– 5.5 V (QFN)
2
of board area, excluding the antenna
ANT
ANT
FM
AM
quality,
RFGND
GND
VDD
AMI
FMI
Figure 9. Functional Block Diagram
and
LNA
LNA
AGC
AGC
LDO
improves
Rev. 1.0
The Si4730/31 utilizes digital processing to achieve high
fidelity, optimal performance, and design flexibility. The
chip provides excellent pilot rejection, selectivity, and
unmatched audio performance, and offers both the
manufacturer
programmability
experience.
The Si4731 incorporates a digital processor for the
European Radio Data System (RDS) and the North
American Radio Broadcast Data System (RBDS)
including
synchronization, error detection, and error correction
functions. Using this feature, the Si4731 enables
broadcast data such as station identification and song
name to be displayed to the user.
5.2. Operating Modes
The Si4730/31 operates in either an FM receive or an
AM receive mode. In FM mode, radio signals are
received on FMI and processed by the FM front-end
circuitry. In AM mode, radio signals are received on AMI
and processed by the AM front-end circuitry. In addition
to the receiver mode, there is a clocking mode to
choose to clock the Si4730/31 from a reference clock or
crystal. On the Si4731, there is an audio output mode to
choose between an analog and/or digital audio output.
AFC
ADC
ADC
(Si4731)
LOW-IF
RDS
DSP
all
INTERFACE
CONTROL
required
Si473x
and
DIGITAL
(Si4731)
and
AUDIO
DAC
DAC
flexibility
the
symbol
DOUT
GPO/DCLK
ROUT
LOUT
VIO
1.85–3.6 V
DFS
end-user
in
decoding,
the
extensive
listening
block