SI4707 [SILICON]
Audio Single Chip Receiver, FM, 3 X 3 MM, 0.55 MM HEIGHT, ROHS COMPLIANT, QFN-20;
| 型号： | SI4707 |
| 厂家： | 
SILICON |
| 描述： | Audio Single Chip Receiver, FM, 3 X 3 MM, 0.55 MM HEIGHT, ROHS COMPLIANT, QFN-20 商用集成电路 |
| 文件： | 总2页 (文件大小：183K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
Si4707
Weather Band and SAME Data Receiver
Description
Features
The Si4707 is the industry's first weather band (WB) radio
receiver IC to include a specific area message encoding
(SAME) processor. Offering unmatched integration and
PCB space savings, the Si4707 requires only one external
component and less than 15 mm2 of board area. Available
in a tiny 3 x 3 mm QFN package, it eliminates the need for
a front-end tuner IC, external ADC, DSP processor, RAM,
and numerous discrete components found in traditional
SAME weather band radios. The Si4707 weather band
receiver provides the space savings and low power
consumption necessary for portable devices while
delivering the high performance and design simplicity
desired for all weather alert radios.
- Weather band support (162.4–162.55 MHz)
- SAME processor
- Excellent SAME sensitivity
- Byte-wise data quality metrics
- Advanced error correction
- 1050 Hz alert tone detection
- Excellent real-world performance
- Freq synthesizer with integrated VCO
- Automatic frequency control (AFC)
- Automatic gain control (AGC)
- Adaptive noise suppression
- WB digital tuning
- Low-IF direct conversion with no external ceramic
filters
- Programmable reference clock
- Volume control
- Receive signal quality indicators (RSSI and SNR)
- 2-wire and 3-wire control interface
- Integrated LDO regulator
- 2.7 to 5.5 V supply voltage
- Firmware upgradeable
Leveraging Silicon Laboratories' proven and patented
Si4700/01 FM tuner's digital low intermediate frequency
(low-IF) receiver architecture, the Si4707 delivers superior
RF performance combined with sophisticated digital
processing to yield best-in-class audio quality and SAME
data sensitivity.
The high integration and complete system production test
simplifies design in, increases system quality, and
improves manufacturability.
The Si4707 is a feature-rich solution including 1050 Hz
tone detection, automatic frequency control, dynamic
channel bandwidth filters, and digital tuning. In addition, the
Si4707 provides a programmable reference clock and
supports an I2C compatible 2-wire control interface, SPI,
and a Si4700/01 backwards compatible 3-wire control
interface.
- 3 x 3 x 0.55 mm 20-pin QFN package
- Pb-free/RoHS compliant
Applications
- Emergency radios
- Table and portable radios
- Stereos
- Mini/micro systems
- Portable media players
- Boom boxes
The Si4707 incorporates a digital processor to provide
SAME data, advance error correction, and SAME data
quality metrics. Using this feature, the Si4707 enables
broadcast alert data such as severe thunderstorm warning
or flash flood watch to be displayed to the user.
- Cellular handsets
- Modules
- Clock radios
- Mini HiFi
Weather Band
Antenna
Si4707
ADC
ADC
DAC
LOUT
ROUT
FMI
LNA
PGA
DSP
RFGND
DAC
AGC
0/90
RSSI /
SNR
32.768 kHz
GPO
GPO
SAME
RCLK
AFC
CONTROL
INTERFACE
2.7–5.5 V
VDD
XTAL
OSC
REG
Weather Band
Copyright © 2008 by Silicon Laboratories
4.2.08
Si4707
Weather Band and SAME Data Receiver
Selected Weather Band Electrical Specifications
Parameter
Input Frequency
Symbol
Test Condition
Min
162.4
—
Typ
—
Max
162.55
—
Unit
MHz
fR
Sensitivity
SINAD = 12 dB
±25 kHz
0.9
52
µV EMF
dB
Adjacent Channel Selectivity
Audio S/N
—
—
—
45
—
dB
AFSK Trip Sensitivity
100% of message correctly
received
—
0.7
—
µV EMF
Supply Voltage
VD, VA
VIO
IFM
2.7
1.5
—
—
5.5
3.6
V
V
Interface Supply Voltage
Supply Current
Powerdown Current
IPD
—
—
3
19.1
—
—
300
—
µA
Hz
Audio Frequency Response Low
Audio Frequency Response High
–3 dB
–3 dB
—
kHz
Pin Assignments
3 x 3 x 0.55 mm, 20-pin QFN Package Information
20 19 18 17
NC
FMI
1
16
2
15 NC
RFGND
NC
3
4
5
14 LOUT
13 ROUT
12 GND
11 VDD
GND
PAD
RST
6
7
8
9
10
Symbol
Millimeters
Nom
Symbol
Millimeters
Min
Max
Min
Nom
Max
A
A1
b
0.50
0.00
0.18
0.27
0.55
0.60
0.05
0.30
0.37
f
2.53 BSC
0.02
L
0.35
0.00
—
0.40
—
0.45
0.10
0.10
0.10
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
1.60
1.60
1.80
1.80
—
—
0.50 BSC
3.00 BSC
1.70
—
—
E
—
—
E2
Weather Band
Copyright © 2008 by Silicon Laboratories
4.2.08
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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