SI4708-B-GM Silicon Laboratories Inc, SI4708-B-GM Datasheet

SI4708-B-GM

Manufacturer Part Number

SI4708-B-GM

Description

QFN 16/-20 TO 85 OC/SI4708 BROADCAST FM RADIO TUNER2.5X2.5X0.55 16-PIN QFN

Manufacturer

Silicon Laboratories Inc

Datasheet

1.SI4709-B-GM.pdf (42 pages)

Specifications of SI4708-B-GM

Lead_time

Pack_quantity

Comm_code

85423190

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Price

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Features



Applications



Description

The Si4708/09 is the world's smallest FM broadcast receiver, integrating

the complete tuner function from antenna input to stereo audio output with

RDS (Si4709).

Functional Block Diagram

Confidential Rev. 1.4 3/10

R O A D C A S T

Worldwide FM band support

(76–108 MHz)

Digital low-IF receiver

Frequency synthesizer with

integrated VCO

Adjustable seek tuning

Automatic frequency control

(AFC)

Automatic gain control (AGC)

Excellent overload immunity

Signal strength measurement

Programmable de-emphasis

(50/75 µs)

Adaptive noise suppression

Cellular handsets

MP3 players

Portable radios

Headphone

32.768 kHz

Cable

RFGND

Silicon Laboratories Confidential. Information contained herein is covered under non-disclosure agreement (NDA).

RCLK

FMI

LNA

TUNE

AGC

REG

F M R



0 / 90

Portable navigation

Consumer electronics

PGA

AFC

A D I O

ADC



Adjustable soft mute

Volume control

Line-level analog output

32.768 kHz reference clock

2-wire and 3-wire control

interface

2.7 to 5.5 V

Integrated LDO regulator allows

direct connection to battery

2.5 x 2.5 mm 16-pin QFN

package



RDS/RBDS Processor (Si4709)

(Si4709)

LOW-IF

Pb-free/RoHS compliant

RSSI

DSP

RDS

U N E R FOR

Si4708/09



GPIO

DAC

USB FM radio

PDAs

Notebook PCs

supply voltage

LOUT

ROUT

SCLK

SDIO

GPO

RST

SEN

VIO

O R TA B L E

S i 4 7 0 8 / 0 9 - B

Patents pending

Notes:

1. To ensure proper operation and FM

2. Place Si4708/09 as close as possible

RFGND

receiver performance, follow the

guidelines in “AN350: Si4708/09

Antenna, Schematic, Layout, and

Design Guidelines " and “AN383:

Si47xx Antenna Selection and

Universal Layout Guidelines.” Silicon

Laboratories will evaluate schematics

and layouts for qualified customers.

to antenna jack and keep the FMI

trace as short as possible.

RST

SEN

FMI

Ordering Information:

Pin Assignments

P P L I C A T I O N S

Si4708/09-GM

See page 34.

(Top View)

GND

PAD

Si4708/09-B

ROUT

GND

LOUT

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