Si4731-A-EVB Silicon Laboratories Inc, Si4731-A-EVB Datasheet - Page 16

• Manufacturer Part Number: Si4731-A-EVB
• Description: WiFi / 802.11 Modules & Development Tools Si4731 Eval Board
• Manufacturer: Silicon Laboratories Inc

Specifications of Si4731-A-EVB

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

Si4730/31-A10
4. Functional Description
4.1. 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 including
advanced seek algorithms, soft mute, auto-calibrated
digital tuning, and FM stereo processing. In addition, the
Si4730/31 provides a programmable reference clock.
The device supports I
interface, SPI, and a Si4700/01 backwards-compatible
3-wire control interface.
16
system
2.7 - 5.5 V
2
ANT
FM
ANT
of board area, excluding the antenna
AM
2
C-compatible 2-wire control
quality,
RFGND
GND
VDD
AMI
FMI
Figure 8. 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 and flexibility in listening 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.
4.2. 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 (pin 2) and processed by the FM front-
end circuitry. In AM mode, radio signals are received on
AMI (pin 4) 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. The receiver mode and the clocking
mode are set by the POWER_UP command listed in
Table 12. Si473x Command Summary.
AFC
ADC
ADC
all
(Si4731)
LOW-IF
RDS
DSP
INTERFACE
CONTROL
required
and
Si473x
DAC
DAC
the
symbol
end-user
ROUT
LOUT
VIO
1.5-3.6V
decoding,
extensive
block