Si4730/31-D60

Broadcast AM/FM Radio Receiver

New Si4730/31-D60 Features

FM Multipath Detection and Mitigation

Provides the ability to detect a multipath situation and maintain audio SNR fidelity. Multipath mitigation is important in RF environments with high signal scatterings such as cities with tall buildings.

FM Hi-Cut Control

Hi-cut control is employed to increase the audio quality during low SNR and/or multipath situations. Hi-cut on the Si4730/31-D60 improves the sound quality by seamlessly selecting 1 of 7 different audio filters to optimize SNR versus audio frequency range. The end result is lower noise on weak stations and stations suffering from multipath.

Advanced Stereo Blend

The Si4730/31-D60 uses RSSI, SNR, and multipath to determine the best blend setting, providing an enhanced user listening experience. Utilizing these three metrics, stereo blend is optimized to allow for full stereo in high fidelity situations and a blended or full mono in sub-optimal conditions. Traditional stereo blend only uses the receive signal strength indicator (RSSI) to blend from stereo to mono.

Auxiliary Input

The optional analog auxiliary input (line-in) eliminates the need for an ADC when using a digital system architecture. The left and right auxiliary inputs get digitized on-chip. Audio output formats include I2S, Left- justified, and Right-justified.

Advanced RDS Processor

The Si4731-D60 implements an advanced, high-performance RDS processor for demodulation, symbol decoding, block synchronization, error detection, and error correction. The advance RDS decoder provides improved RDS sensitivity, excellent RDS persistence, faster lock, and lower decoder error rates resulting in acquiring RDS information faster and greater data reliability in low SNR environments.

Smart Tune

The Si4730/31-D60 automatically selects the IF injection side to optimize the SNR. This improves the desired station reception in areas that have large near-in blockers.

Selected Electrical Specifications

Parameter

Symbol

Test Condition

Min

Typ

Max

Unit

FM Input Frequency

fRF

 

64

—

108

MHz

AM Input Frequency

fRF

 

520

—

1710

kHz

FM Sensitivity with 50  network

 

(S+N)/N = 26 dB

—

1.1

—

µV EMF

RDS Sensitivity

 

 

—

8

—

µV EMF

AM Sensitivity

 

(S+N)/N = 26 dB

—

25

—

µV EMF

Input IP3

 

f2 – f1 > 1 MHz; f0 = 2 x f1 – f2

—

105

—

dBµV EMF

FM Adjacent Channel Selectivity

 

±200 kHz

—

50

—

dB

FM Alternate Channel Selectivity

 

±400 kHz

—

70

—

dB

FM Audio Stereo Separation

 

 

34

42

—

dB

FM Audio S/N

 

 

—

63

—

dB

AM Audio S/N

 

 

—

56

—

dB

AM and FM Audio THD

 

 

—

0.1

—

%

AM/FM Receiver

Copyright © 2010 by Silicon Laboratories

9.17.10

Silicon Laboratories and Silicon Labs are trademarks of Silicon Laboratories Inc.

Other products or brandnames mentioned herein are trademarks or registered trademarks of their respective holders.

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Silicon Laboratories SI4730 FM Hi-Cut Control, Advanced Stereo Blend, Auxiliary Input, Advanced RDS Processor, Smart Tune
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SI4730 specifications

Silicon Laboratories SI4730 is a highly versatile and compact AM/FM radio receiver designed for a wide range of applications, including consumer electronics, automotive systems, and industrial devices. This semiconductor solution has gained attention due to its comprehensive features, advanced technologies, and energy-efficient characteristics, making it an ideal choice for developers and manufacturers seeking high-performance audio integration.

One of the main features of the SI4730 is its robust multi-band reception capability. It supports AM, FM, and digital radio standards, ensuring exceptional audio quality and performance across various frequency ranges. The chip integrates advanced digital signal processing (DSP) technology, enabling clear audio playback and reduced noise interference. This capability is essential for enhancing the listener's experience, particularly in environments with variable signal strength.

The SI4730 employs a low-power architecture, which is crucial for battery-operated devices. It is designed to consume minimal energy, ensuring prolonged battery life while providing high-quality reception. This efficiency extends to both active and sleep modes, making it suitable for portable applications where energy conservation is paramount.

Another significant characteristic of the SI4730 is its tuning flexibility. It features a programmable GPIO interface that allows for smooth tuning and easy integration with microcontrollers. This enables developers to customize their designs while simplifying the implementation process. Furthermore, the device supports seek tuning and preset storage, allowing users to quickly access their favorite stations.

In addition to its core capabilities, the SI4730 boasts built-in features such as RDS (Radio Data System) support, which provides useful information such as station identification and song titles. This enhances the overall user experience, making the system more informative and engaging.

The compact footprint of the SI4730 makes it an excellent choice for space-constrained applications. Its small form factor allows for easy integration into various devices without sacrificing performance. With a wide supply voltage range and adjustable power levels, this receiver chip is adaptable to different system requirements.

Overall, Silicon Laboratories SI4730 represents a powerful blend of advanced technology, energy efficiency, and versatile features. Its ability to deliver high-quality audio while maintaining low power consumption makes it an appealing option for modern electronic devices seeking to provide an enhanced listening experience. As the demand for integrated audio solutions continues to grow, the SI4730 stands out as a leading choice in the marketplace.
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