SI4712 [SILICON]
RF and Baseband Circuit, CMOS, QFN-20;
| 型号： | SI4712 |
| 厂家： | 
SILICON |
| 描述： | RF and Baseband Circuit, CMOS, QFN-20 电信 电信集成电路 |
| 文件： | 总2页 (文件大小：179K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
Si4712/13
FM Radio Transmitter with Receive Power Scan
Description
Features
The Si4712/13 is the industry's first 100% CMOS FM
radio transmitter with an integrated receiver to
measure receive signal strength. 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 Si4712/13 offers
industry leading size, performance, low power
consumption, and ease of use.
- Integrated receiver for receive power measurement
- 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 (Si4713 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 Si4712/13’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
Si4712/13.
- Integrated LDO regulator
- 3 x 3 x 0.55 mm 20-pin QFN
- Pb-free and RoHS Compliant
The Si4713 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 Si4713 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 for adjusting their system’s
radiated power levels to comply with local regulations
on RF transmission (FCC, ETSI, ARIB, etc.).
Si4712/13
PEAK
DETECT
DIN
DIGITAL
AUDIO
DFS
DSP
Tx
Ant
ADC
ADC
LIN
DAC
TXO
L1
120 nH
RIN
VDD
DAC
RFGND
2.7–5.5 V
CONTROL
INTERFACE
GPO
RDS (Si4713)
AFC
LDO
GND C1
22 nF
FM Tuner
Copyright © 2008 by Silicon Laboratories
4.3.08
Si4712/13
FM Radio Transmitter with Receive Power Scan
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
Transmit Voltage Step
VRF = 102–118 dBµV
–2.5
—
—
1
2.5
2
dB
dB
dBC
dBC
µs
Transmit Channel Edge Power
Transmit Adjacent Channel Power
—
—
–20
–26
80
—
–30
75
50
63
0.1
35
50
—
TX_PREMPHASIS = 75 µs
TX_PREMPHASIS = 50 µs
70
45
—
Pre-Emphasis Time Constant
54
µs
Audio SNR Mono
—
dB
%
Audio THD Mono
—
0.5
—
Audio Stereo Separation
Sub Carrier Rejection Ratio
Input Signal Level (0 dB)
Audio Bandwidth (3 dB)
Audio Imbalance
30
40
—
dB
dB
Vpk
Hz
dB
ms
V
SCR
VAI
—
0.636
15 k
1
30
–1
—
—
—
Powerup Settling Time
Supply Voltage
From Powerdown
—
110
5.5
3.6
22.8
600
VDD
VIO
ITX
2.7
1.5
—
—
Interface Supply Voltage
TX Supply Current
—
V
FM TX from Line Input
18.8
320
mA
µA
TX Interface Supply Current
IIO
—
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 © 2008 by Silicon Laboratories
4.3.08
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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