SI4704-B20-GMR [SILICON]
RF and Baseband Circuit, 3 X 3 MM, 0.55 MM HEIGHT, LEAD FREE, QFN-20;
| 型号： | SI4704-B20-GMR |
| 厂家： | 
SILICON |
| 描述： | RF and Baseband Circuit, 3 X 3 MM, 0.55 MM HEIGHT, LEAD FREE, QFN-20 电信 电信集成电路 |
| 文件： | 总3页 (文件大小：988K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
Si4704/05
Enhanced Broadcast FM Radio Receiver for Portable Applications
FM transmit, AM/FM/SW receive, weather band receive
Description
and SAME decode, and unparalleled RDS data receivers.
The complete solution, including a minimal BOM, requires
less than 15 mm2 board area, or less than half that of other
competing solutions. The Si4705 incorporates Silicon Labs'
proven and widely adopted RDS processor, including
worldwide compliance, all symbol decoding, error
detection, error correction, and other RDS functions. The
Si4705 RDS functionality is unmatched in the industry for
performance, on-chip processing, and worldwide adoption.
The Si4704/05 enhanced FM receiver is the most
advanced portable solution available today offering
embedded antenna support, digital audio out, worldwide
FM band support, and highly flexible, mature, and proven
FM functionality in
a simple API. The Si4704/05
incorporates Silicon Labs' tuned-resonance antenna
technology for crystal clear FM reception in wire-free
device enclosures. Silabs' internationally patented tuned-
resonance technology allows embedded FM antennas
such as PCB traces, loops, stubs, or other devices to
perform exceptionally well, enabling devices with
integrated Bluetooth to receive FM transmissions without
an external FM antenna, and transmit the FM content to
Bluetooth-enabled headsets. This is the best, most cost-
effective solution to enable wire-free FM reception.
Features
- Worldwide FM band support (64~108 MHz)
- Supports integrated antenna
- Digital low-IF receiver
- Excellent real-world performance
- Frequency synthesizer with integrated VCO
- Seek tuning
- Automatic frequency control (AFC)
- Automatic gain control (AGC)
- Integrated LDO regulator
The Si4705 also offers digital audio out for FM recording.
Content recorded over the Si4705 can be shared with
friends or played at a later time in MP3 format. The content
can also be tagged with RDS information, allowing song
name and artist labels to be displayed as is done with MP3
meta data. Using the digital audio out, the Si4705 can also
reduce total system power consumption by avoiding
unnecessary ADC/DAC conversions between the FM
receiver and the host processor.
- Minimal BOM
- Adjustable seek parameters
- Adjustable mono/stereo blend
- Adjustable soft mute
The Si4704/05 truly supports worldwide FM bands, starting
at 64 MHz for Eastern European countries and extending
all the way to 108 MHz for the rest of the world. The device
supports channel spacing down to 10 kHz, and includes
advanced, proven seek functionality. All the Silicon Labs
proven FM receiver expertise is incorporated in the Si4704/
05, gained through thousands of designs with almost every
OEM and ODM in the world and over 100 million devices
shipped.
- RDS/RBDS decoder(Si4705 only)
- Optional digital audio output (Si4705 only)
- Programmable de-emphasis(50/75us)
- Programmable reference clock input
- Signal quality measurement
- 3 x 3 x 0.55 mm 20-pin Pb-free QFN package
Applications
- Cellular handsets
- MP3 players
- Portable media players
- Personal computers
- Portable navigation devices
- Consumer electronics
The Si4704/05 leverage Silicon Labs' internationally
patented and proven digital low-IF architecture, offering
proven functionality in a simple and mature API. The
device is offered in
a
highly reliable, ultra-small
3 x 3 x 0.55 mm 20-pin QFN and is layout compatible with
the full suite of Silicon Labs broadcast offerings including
Headphone
Cable
Si4704/05
ADC
ADC
DAC
FMI
LOUT
ROUT
LNA
PGA
DSP
RFGND
DAC
AGC
GPO
LPI
0/90
DCLK
DOUT
DFS
32.768 kHz
RDS
(Si4705)
RSSI
RCLK
AFC
CONTROL
INTERFACE
2.7–5.5 V
VDD
XTAL
OSC
REG
FM Tuner
Copyright © 2008 by Silicon Laboratories
4.02.08
Si4704/05
Enhanced Broadcast FM Radio Receiver for Portable Applications
Selected Electrical Specifications
Parameter
Input Frequency
Symbol
Test Condition
Min
64
—
Typ
—
Max
108
—
Unit
MHz
fRF
Sensitivity (76–108 MHz)
Input IP3
(S+N)/N = 26 dB
1.1
105
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
dB
RCLK Frequency Tolerance
Audio Output Voltage
Audio Mono S/N
–100
72
55
—
100
90
80
63
—
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
19.2
10
—
mA
Powerdown Current
Seek/Tune Time
IPD
—
12
µA
—
—
80
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
20 19 18 17
NC
FMI
1
16
2
15 DOUT
14 LOUT
13 ROUT
12 GND
11 VDD
RFGND
LPI
3
4
5
GND
PAD
RST
6
7
8
9
10
Symbol
Millimeters
Symbol
Millimeters
Min
0.50
0.00
0.18
0.27
Nom
0.55
0.02
0.25
0.32
3.00 BSC
1.70
0.50 BSC
3.00 BSC
1.70
Max
0.60
0.05
0.30
0.37
Min
Nom
2.53 BSC
0.40
—
—
Max
A
A1
b
c
D
D2
e
E
f
L
L1
aaa
bbb
ccc
ddd
eee
0.35
0.00
—
—
—
0.45
0.10
0.10
0.10
0.08
0.10
0.10
—
—
—
—
1.60
1.80
—
—
E2
Notes:
1.
1.60
1.80
All dimensions are shown in millimeters unless otherwise noted.
Dimensioning and tolerancing per ANSI Y14.5M-1994.
2.
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
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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
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