Si4710/11 Data Short

Si4710/11
FM Radio Transmitter for Portable Applications
Description
Features
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 transmit to be added to any
portable device by using a single chip. As with the
Si4700/01, the Si4710/11 offers industry leading size,
performance, low power consumption, and ease of
use.
- Worldwide FM band support 
(76–108 MHz) for transmit
- Requires only two external components
- Frequency synthesizer with integrated VCO
- Digital stereo modulator
- Programmable pre-emphasis 
(50/75 µs)
- Analog/digital audio interface
- Programmable reference 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
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 error correction
functions. Using this feature, the Si4711 enables data
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 levels to comply with local regulations
on RF transmission (FCC, ETSI, ARIB, etc.).
Applications
Cellular handsets/hands-free
MP3 players
Portable audio/video players
Wireless speakers/microphone
Satellite digital audio radios
Personal computers/notebooks
-
Si4710/11
DIGITAL
AUDIO
DFS
DIN
LIN
ADC
DAC
TXO
DSP
FM Tuner
RFGND
L1
120 nH
AFC
VIO
RST
SDIO
CONTROL
INTERFACE
SCLK
GPO
( i4711 )
RDS S
GPO1
LDO
SEN
GND
C1
22 nF
GPIO3/DCLK
VDD
GPIO2/INT
2.7–5.5 V
DAC
Copyright © 2008 by Silicon Laboratories
RCLK
ADC
RIN
Tx
Ant
4.3.08
Si4710/11
FM Radio Transmitter for Portable Applications
Selected Electrical Specifications
Parameter
Transmit Frequency Range
Programmable Transmit Output Voltage,
TXO
Transmit Voltage Accuracy
Transmit Voltage Step
Transmit Channel Edge Power
Transmit Adjacent Channel Power
Symbol
fRF
Min
76
Typ
—
Max
108
Unit
MHz
—
118
—
dBµV
TXPREMPHASIS = 75 µs
TXPREMPHASIS = 50 µs
–2.5
—
—
—
70
45
—
—
30
40
—
1
—
–30
75
50
63
0.1
35
50
2.5
2
–20
–26
80
54
—
0.5
—
—
dB
dB
dBC
dBC
µs
µs
dB
%
dB
dB
0.6 VRMS input,
VIO = 1.8 V
—
—
0.636
Vpk
30
–1
—
—
—
—
15 K
1
110
Hz
dB
ms
2.7
—
5.5
V
VRF = 102–118 dBµV
Pre-emphasis Time Constant
Audio SNR Mono
Audio THD Mono
Audio Stereo Separation
Sub Carrier Rejection Ratio
Test Condition
SCR
Input Signal Level (0 dB)
VAI
Audio Bandwidth (3 dB)
Audio Imbalance
Powerup Settling Time
From powerdown
Supply Voltage
VDD
Interface Supply Voltage
VIO
TX Supply Current
ITX
TX Interface Supply Current
IIO
FM TX from Line Input
NC
1
3.6
V
18.8
22.8
mA
—
320
600
µA
Package Information
20 19 18 17 16
NC 2
15 RIN
RFGND 3
14 DFS
GND
PAD
TXO 4
13 DIN
7
8
9
SDIO
RCLK
10 11 VDD
VIO
6
SCLK
12 GND
SEN
RST 5
Symbol
A
A1
b
c
D
D2
e
E
E2
FM Tuner
—
—
LIN
GPO3/DCLK
GPO2/IRQ
GPO1
NC
Pin Assignments
1.5
Min
0.50
0.00
0.20
0.27
1.65
1.65
Millimeters
Nom
0.55
0.02
0.25
0.32
3.00 BSC
1.70
0.50 BSC
3.00 BSC
1.70
Symbol
Max
0.60
0.05
0.30
0.37
1.75
Min
f
L
L1
aaa
bbb
ccc
ddd
eee
0.35
0.00
—
—
—
—
—
Millimeters
Nom
2.53 BSC
0.40
—
—
—
—
—
—
Max
0.45
0.10
0.05
0.05
0.08
0.10
0.10
1.75
Copyright © 2008 by Silicon Laboratories
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
4.3.08
Smart.
Connected.
Energy-Friendly
Products
Quality
Support and Community
www.silabs.com/products
www.silabs.com/quality
community.silabs.com
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.
Silicon Laboratories Inc.
400 West Cesar Chavez
Austin, TX 78701
USA
http://www.silabs.com