SI4710-A-EVB - Silicon Labs

ADC

Si4710/11

DSP

DAC

VIO

SCLK

SDIO

CONTROL

INTERFACE

SEN

GPO

RDS (

Si4711 )

GPIO3/DCLK

RST

GPIO2/INT

GPO1

LDO

VDD

GND

2.7–5.5 V

22 nF

LIN

RIN

Ant

TXO

DIN

DFS

AFC

RCLK

120 nH

RFGND

DIGITAL

AUDIO

Si4710/11

FM Radio Transmitter for Portable Applications

Description

The Si4710/11 is the industry's first 100% CMOS FM

transmitter single chip IC. The device leverages

Silicon Labs’ highly successful and proven Si4700/01

FM receiver, and offers unmatched integration and

performance allowing FM tra nsmit to be added to any

portable device by using a single chip. As with the

Si4700/01, the Si4 710/11 of fe rs industry lead ing size,

performance, low power consumption, and ease of

use.

The Si4710/11’s digital integration reduces the

required external components of traditional offerings,

resulting in a solution requiring only an external

inductor and bypass capacitor, and PCB space of

approximately 15 mm2. High reliability in device

manufacturing, improved quality, easy design-in, and

software programmability are key advantages of the

Si4710/11.

The Si4711 supports the European Radio Data

System (RDS) and the US Radio Broadcast Data

System (RBDS) standards including all the symbol

encoding, block synchronization, and erro r corre ctio n

functions. Using this feature, the Si 4711 enables dat a

such as artist name and song title to be transmitted

to an RDS/RBDS receiver.

Users are responsible for adjusting their system’s

radiated power le vels to comply with local regulations

on RF transmission (FCC, ETSI, ARIB, etc.).

Features

-Worldwide FM band suppor t 

(76–108 MHz) for transmit

-Requires only two external components

-Frequency synthesizer with integr ated VCO

-Digital stereo modulator

-Programma b le pr e- em p ha sis 

(50/75 µs)

-Analog/digital audio interface

-Programma b le re fe re nc e clock

-RDS/RBDS transmit encoder (Si4711 only)

-PCB loop antenna support with self calibrated

capacitor tuning

-Programmable transmit level

-Programmable modulation

-2.7 to 5.5 V supply voltage

-Digital gain compression

-Integrated LDO regulator

-3 x 3 x 0.55 mm 20-pin QFN

-Pb-free and RoHS Compliant

Applications

-Cellular handsets/hands-free

-MP3 players

-Portable audio/video players

-Wireless speakers/microphone

-Satellite digital audio radios

-Personal computers/notebooks

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

Si4710/11

FM Radio Transmitter for Portable Applications

Selected Electrical Specifications

Parameter Symbol Test Condition Min Typ Max Unit

Transmit Frequency Range fRF 76 —108 MHz

Programmable Transmit Output Voltage,

TXO —118 —dBµV

Transmit Voltage Accuracy VRF = 102–118 dBµV –2.5 —2.5 dB

Transmit Voltage Step — 1 2 dB

Transmit Channel Edge Power — — –20 dBC

Transmit Adjacent Channel Power —–30 –26 dBC

Pre-emphasis Time Constant TXPREMPHASIS = 75 µs 70 75 80 µs

TXPREMPHASIS = 50 µs 45 50 54 µs

Audio SNR Mono —63 —dB

Audio THD Mono —0.1 0.5 %

Audio Stereo Separation 30 35 —dB

Sub Carrier Rejection Ratio SCR 40 50 —dB

Input Signal Level (0 dB) VAI 0.6 VRMS input,

VIO = 1.8 V — — 0.636 Vpk

Audio Bandwidth (3 dB) 30 —15 K Hz

Audio Imbalance –1 — 1 dB

Powerup Settling Time From powerdown — — 110 ms

Supply Voltage VDD 2.7 —5.5 V

Interface Supply Voltage VIO 1.5 —3.6 V

TX Supply Current ITX FM TX from Line Input —18.8 22.8 mA

TX Interface Supply Current IIO —320 600 µA

Pin Assignments

GND

PAD

17181920

6789

GPO2/IRQ

VIO

RIN

DFS

DIN

GNDRST

TXO

RCLK

SDIO

VDD

RFGND

GPO3/DCLK

GPO1

LIN

SCLK

SEN

Package Information

Symbol Millimeters Symbol Millimeters

Min Nom Max Min Nom Max

A 0.50 0.55 0.60 f 2.53 BSC

A1 0.00 0.02 0.05 L 0.35 0.40 0.45

b 0.20 0.25 0.30 L1 0.00 — 0.10

c 0.27 0.32 0.37 aaa — — 0.05

D 3.00 BSC bbb — — 0.05

D2 1.65 1.70 1.75 ccc — — 0.08

e 0.50 BSC ddd — — 0.10

E 3.00 BSC eee — — 0.10

E2 1.65 1.70 1.75

Disclaimer

Silicon Laboratories intends to provide customers with the latest, accurate, and in-depth documentation of all peripherals and modules available for system and software implementers

using or intending to use the Silicon Laboratories products. Characterization data, available modules and peripherals, memory sizes and memory addresses refer to each specific

device, and "Typical" parameters provided can and do vary in different applications. Application examples described herein are for illustrative purposes only. Silicon Laboratories

reserves the right to make changes without further notice and limitation to product information, specifications, and descriptions herein, and does not give warranties as to the accuracy

or completeness of the included information. Silicon Laboratories shall have no liability for the consequences of use of the information supplied herein. This document does not imply

or express copyright licenses granted hereunder to design or fabricate any integrated circuits. The products must not be used within any Life Support System without the specific

written consent of Silicon Laboratories. A "Life Support System" is any product or system intended to support or sustain life and/or health, which, if it fails, can be reasonably expected

to result in significant personal injury or death. Silicon Laboratories products are generally not intended for military applications. Silicon Laboratories products shall under no

circumstances be used in weapons of mass destruction including (but not limited to) nuclear, biological or chemical weapons, or missiles capable of delivering such weapons.

Trademark Information

Silicon Laboratories Inc., Silicon Laboratories, Silicon Labs, SiLabs and the Silicon Labs logo, CMEMS®, EFM, EFM32, EFR, Energy Micro, Energy Micro logo and combinations

thereof, "the world’s most energy friendly microcontrollers", Ember®, EZLink®, EZMac®, EZRadio®, EZRadioPRO®, DSPLL®, ISOmodem ®, Precision32®, ProSLIC®, SiPHY®,

USBXpress® and others are trademarks or registered trademarks of Silicon Laboratories Inc. ARM, CORTEX, Cortex-M3 and THUMB are trademarks or registered trademarks of

ARM Holdings. Keil is a registered trademark of ARM Limited. All other products or brand names mentioned herein are trademarks of their respective holders.

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