SI4710 [SILICON]
FM Radio Transmitter for Portable Applications; 调频广播发射机，用于便携式应用
| 型号： | SI4710 |
| 厂家： | 
SILICON |
| 描述： | FM Radio Transmitter for Portable Applications |
| 文件： | 总2页 (文件大小：177K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
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
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
2
approximately 15 mm . High reliability in device
manufacturing, improved quality, easy design-in, and
software programmability are key advantages of the
Si4710/11.
- Integrated LDO regulator
- 3 x 3 x 0.55 mm 20-pin QFN
- Pb-free and RoHS Compliant
The Si4711 supports the European Radio Data
System (RDS) and the US Radio Broadcast Data
System (RBDS) 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.
Applications
- Cellular handsets/hands-free
- MP3 players
- Portable audio/video players
- Wireless speakers/microphone
- Satellite digital audio radios
- Personal computers/notebooks
Users are responsible to adjust their system’s
radiated power levels to comply with local regulations
on RF transmission (FCC, ETSI, ARIB, etc.).
DIGITAL
AUDIO
DFS
DIN
Si471x
LIN
ADC
ADC
DAC
DAC
Tx
Ant
TXO
DSP
L1
120nH
RIN
RFGND
2. 7– 5.5 V
VDD
GPO
CONTROL
INTERFACE
LDO
AFC
C1 GND
(
)
RDS Si4711
22nF
FM Tuner
Copyright © 2007 by Silicon Laboratories
1.8.07
Si4710/11
FM Radio Transmitter for Portable Applications
Selected Electrical Specifications
Parameter
Symbol Test Condition
Min
76
Typ
—
Max
108
—
Unit
MHz
dBµV
Transmit Frequency Range
fRF
Programmable Transmit Output Voltage,
TXO (Maximum Voltage)
—
115
Programmable Transmit Output Voltage,
TXO (Minimum Voltage)
—
83
—
dBµV
Transmit Voltage Stability
–1
—
—
—
70
45
—
—
30
—
—
—
1
1
2
dB
dB
Transmit Voltage Step
Transmit Channel Edge Power
Transmit Adjacent Channel Power
Pre-emphasis Time Constant
—
–20
–26
80
dBC
dBC
us
–30
75
50
63
0.1
35
–50
—
FMPE[1:0] = 00
FMPE[1:0] = 01
54
us
Audio SNR
—
dB
Audio THD
0.5
—
%
Audio Stereo Separation
Sub Carrier Rejection Ratio
Input Signal Level (0 dB)
dB
SCR
–40
0.636
dB
VAI
0.6 VRMS input,
VIO = 1.8 V
Vpk
Audio Bandwidth (3 dB)
Audio Imbalance
20
–1
—
—
—
15 K
1
Hz
dB
ms
Powerup Settling Time
From powerdown
110
—
Pin Assignments
Package Information
20 19 18 17
NC
NC
1
16
2
15 RIN
14 DFS
13 DIN
12 GND
11 VDD
RFGND
TXO
3
4
5
GND
PAD
RST
6
7
8
9
10
Symbol
Millimeters
Symbol
Millimeters
Min
0.50
0.00
0.20
0.27
Nom
0.55
Max
0.60
0.05
0.30
0.37
Min
Nom
Max
A
A1
b
f
2.53 BSC
0.02
L
0.35
0.00
—
0.40
—
0.45
0.10
0.05
0.05
0.08
0.10
0.10
0.25
L1
c
0.32
aaa
bbb
ccc
ddd
eee
—
D
3.00 BSC
1.70
—
—
D2
e
1.65
1.65
1.75
1.75
—
—
0.50 BSC
3.00 BSC
1.70
—
—
E
—
—
E2
FM Tuner
Copyright © 2007 by Silicon Laboratories
1.8.07
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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