Silicon Laboratories SI4730 manual Si4730/31-D60, Broadcast AM/FM Radio Receiver, Description

Si4730/31-D60

Broadcast AM/FM Radio Receiver

Description

The Si4730/31 is the industry's first fully integrated, 100% CMOS AM/FM radio receiver IC. The Si4730/31-D60 AM/ FM radio delivers excellent performance and is simple to design-in. Available in a small 3 x 3 mm QFN package, the Si4730/31 offers unmatched integration and PCB space savings with a minimal number of external components and no factory tuned components.

Leveraging Silicon Laboratories' proven and patented digital 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 system quality, and improves manufacturability.

The Si4730/31 solution includes advanced seek algorithms, multipath detection and mitigation, adjustable soft mute, FM hi-cut control, smart tune, and FM stereo processing. In addition, the Si4730/31 provides an auxiliary input to support a full digital system architecture.

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 and the end-user extensive programmability and flexibility in listening experience.

The Si4731-D60 incorporates an advanced digital processor for the European Radio Data System (RDS) and the North American Radio Broadcast Data System (RBDS) including all required symbol decoding, block 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 end user.

Features

-Worldwide FM band support (64–108 MHz)

-Worldwide AM band support (520–1710 kHz)

-AM/FM digital tuning

-EN55020 compliant

-FM multipath detection and mitigation

-FM hi-cut control

-Advanced stereo blend

-AUXIN stereo ADC

-No manual alignment required

-Seven selectable AM channel filters

-Advanced AM/FM seek tuning

-Programmable AVC max gain

-Frequency synthesizer with integrated VCO

-Automatic frequency control (AFC)

-Programmable de-emphasis

-Digital FM stereo decoder

-Integrated LDO regulator

-Wide range of ferrite and air loop antennas supported

-Advanced FM RDS/RBDS processor

-QFN and SSOP Pb-free/RoHS compliant package

Applications

-Audio video receivers

-Mini/micro systems

-Home theater systems

-Docking stations

-Blu-ray / DVD players

-Table / clock radios

-Boomboxes

FM / SW	RIN							S i473x-D 60
ANT
	LIN
	FMI						RDS				DOUT
									DIGITAL
							(Si4731)				DFS
			LNA
									AUDIO
			AGC				LOW -IF				G PO /D C LK
AM / LW		AMI			M ux	A D C			D A C		R O U T
ANT	RFGND		LNA				DS P
						ADC			DAC		LO U T
			AGC	M u x
2.7~5.5 V (QFN)
2.0~5.5 V (SSOP)		VA						CONTROL
+			LD O		A FC						VD
		GND						INTERFACE
											1.62 - 3.6 V
					RCLK		SEN	SCLK	SDIO	RST

Pin Assignments

Si473x (QFN)

		NC	GPO1	GPO2/INT	GPO3/DCLK	DFS
NC	1	20	19	18	17	16
FMI	2					15	DIN
RFGND	3		GND			14	LOUT/DFS
AMI	4		PAD			13	ROUT/DOUT
RST	5					12	GND
	6	7	8	9	10	11	VDD
	SEN	SCLK	SDIO	RCLK	VIO

Si473x (SSOP)

DOUT/[RIN]		1	24		LOUT/[DFS]
DFS/[LIN]		2	23	ROUT/[DOUT]
GPO3/[DCLK]		3	22	DBYP
		4	21	VA
GPO2/[INT]
GPO1		5	20		VD
	NC	6	19		RCLK
	NC	7	18		SDIO
	FMI	8	17		SCLK
RFGND		9	16
						SEN
	NC	10	15
					RST
	NC	11	14		GND
	AMI	12	13		GND

AM/FM Receiver Copyright © 2010 by Silicon Laboratories 9.17.10