SI4708 [SILICON]
Audio Demodulator, FM, CMOS, QFN-20;
| 型号： | SI4708 |
| 厂家： | 
SILICON |
| 描述： | Audio Demodulator, FM, CMOS, QFN-20 商用集成电路 |
| 文件： | 总2页 (文件大小：189K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
Si4708/09
Broadcast FM Radio Tuner for Portable Applications
Description
Features
As the world's smallest FM receiver, the Si4708/09 extends
Silicon Laboratories Si4700 FM tuner family and further
increases the ease and attractiveness of adding FM radio
reception to mobile devices. Requiring only 6.25 mm2 of
board space, the Si4708/09 is the world's smallest size
along with a minimum component count, flexible and
- Worldwide FM band support (76–108 MHz)
- 2.5 x2.5 mm 16-pin QFN package
- Pb-free/RoHS compliant
- Digital low-IF receiver
- Frequency synthesizer with integrated VCO
- Seek tuning
proven
programmability,
and
superior,
proven
- Automatic frequency control (AFC)
- Automatic gain control (AGC)
- Excellent overload immunity
- Signal strength measurement
- Programmable de-emphasis (50/75 µs)
- Adaptive noise suppression
- Volume control
performance. The Si4708/09 leverage Silicon Laboratories'
highly successful and patented Si4700/01/02/03 FM tuner,
and are software compatible to existing Si4700/01/02/03
FM tuner designs. The Si4708/09 benefits from proven
digital integration and 100% CMOS process technology,
resulting in a completely integrated solution. The Si4708/
09’s proven and highly flexible functionality caters to the
subjective nature of audio preferences and variable FM
broadcast environments worldwide.
- Line-level analog output
- 32.768 kHz reference clock
- RDS/RBDS processor (Si4709 only)
- 2-wire and 3-wire control interface
- –1.8 to 5.5 V supply voltage
- 2.7 to 5.5 VA supply voltage
The Si4709 incorporates a digital processor for the
European Radio Data System (RDS) and the US Radio
Broadcast Data System (RBDS) including all required
symbol decoding, block synchronization, error detection,
and error correction functions. RDS enables data such as
station identification and song name to be displayed to the
user. The Si4709 offers a detailed RDS view and a
standard view, allowing adopters to selectively choose
granularity of RDS status, data, and block errors. Si4709
software is backwards compatible to the proven Si4701/03,
adopted by leading cell-phone, PND, and MP3
manufacturers world-wide.
- Integrated LDO regulator allows direct connection to
battery
Applications
- Cellular handsets
- MP3 players
- PDAs, Notebook PCs
- Portable radios
- Portable navigation
- Automobile applications
- Consumer electronics
- USB FM radios
The Si4708/09 device’s high level of integration and
complete FM system increases quality to manufacturers,
improves device yields and simplifies device manufacturing
and final testing.
Headphone
Cable
Si4708/09
I
LOUT
DAC
DAC
GPIO
ADC
FMP
LNA
AGC
PGA
DSP
RFGND
Q
ADC
ROUT
GPIO
0/90
LOW-IF
32.768 kHz
VIO
RST
RCLK
RDS
(Si4709)
AFC
TUNE
REG
SDIO
SCLK
SEN
VA
VD
XTAL
OSC
RSSI
FM Tuner
Copyright © 2008 by Silicon Laboratories
4.02.08
Si4708/09
Broadcast FM Radio Tuner for Portable Applications
Selected Electrical Specifications
Parameter
Input Frequency
Symbol
Test Condition
Min
76
—
Typ
—
Max
108
—
Unit
MHz
fRF
Sensitivity
Input IP3
(S+N)/N = 26 dB
1.1
106
µV EMF
dBµV EMF
|f2 – f1| > 1 MHz; f0 = 2 x f1 – f2
AGC disabled
—
—
Adjacent Channel Selectivity
Alternate Channel Selectivity
RCLK Frequency
±200 kHz
±400 kHz
—
—
50
70
—
—
dB
dB
—
32.768
—
—
kHz
ppm
mVrms
Hz
RCLK Frequency Tolerance
Audio Output Voltage
Audio Band Limits
Audio S/N
–200
72
30
—
200
90
80
±1.5 dB
—
15k
—
59
dB
Audio THD
—
0.1
—
0.5
5.5
3.6
85
%
Supply Voltage
VD, VA
VIO
TA
2.7
1.5
–20
—
V
Interface Supply Voltage
Ambient Temperature
Supply Current
—
V
25
°C
IAD
14.6
8.5
—
—
mA
Powerdown Current
Seek/Tune Time
IPD
—
12
µA
—
60
ms/channel
MHz
kHz
ms
SCLK Frequency
fCLK
fSCL
3-wire operation
2-wire operation
From powerdown
—
—
2.5
400
110
—
—
Powerup Time
—
—
Package Information
Pin Assignments
1
2
16
15
14
13
LOUT
FM1
12 ROUT
GND
PAD
RFGND
3
11 GND
4
5
10 VD
9
RST
SEN
6
7
8
Symbol
Millimeters
Symbol
Millimeters
Min
Nom
Max
Min
Nom
Max
A
0.50
0.55
0.60
E2
1.35
1.40
1.45
A1
b
0.00
0.18
0.25
0.02
0.23
0.05
0.28
0.35
f
2.00 BSC
L
0.25
—
0.30
—
0.35
0.05
0.05
0.08
0.10
0.10
c
0.30
aaa
bbb
ccc
ddd
eee
D
D2
e
2.50 BSC
1.40
—
—
1.35
1.45
—
—
0.50 BSC
2.50 BSC
—
—
E
—
—
FM Tuner
Copyright © 2008 by Silicon Laboratories
4.02.08
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
相关型号：
©2020 ICPDF网 联系我们和版权申明