SI4701 [SILICON]
Broadcast FM Radio Tuner for Portable Applications; 广播FM收音机调谐器用于便携式应用
| 型号： | SI4701 |
| 厂家： | 
SILICON |
| 描述： | Broadcast FM Radio Tuner for Portable Applications |
| 文件： | 总2页 (文件大小：154K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
Si4700/01
Broadcast FM Radio Tuner for Portable Applications
Description
Features
The Si4700 is the industry's first FM radio tuner IC to
leverage digital integration and 100% CMOS process
technology, resulting in a completely integrated solution
that requires only one external supply bypass capacitor
and less than 20 mm2 of board space. Offering unmatched
integration, the Si4700 allows FM radio reception to be
added to a variety of portable devices where board space,
performance, low power consumption, and ease of use are
essential.
Leveraging Silicon Laboratories' proven Aero® digital low
intermediate frequency (low-IF) receiver architecture and
frequency synthesizer technology, the Si4700 delivers
superior RF performance and interference rejection. Digital
signal processing is utilized to provide optimum sound
quality with varying reception conditions.
- Worldwide FM band support (76–108 MHz)
- Digital low-IF receiver
- Frequency synthesizer with integrated VCO
- Seek tuning
- 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
- Line-level analog output
- 32.768 kHz reference clock
- RDS/RBDS processor (Si4701 only)
- 2-wire and 3-wire control interface
- 2.7 to 5.5 V supply voltage
- Integrated LDO regulator allows direct connection
to battery
The high integration and complete system production test
simplifies design-in, increases quality, and improves
manufacturing. The Si4700 also uses a streamlined
programming model, which further reduces product
development time. Power management is also simplified
with an integrated regulator allowing direct connection to a
2.7 to 5.5 V battery.
- 4x4 mm 24-pin QFN package
- Lead-free/RoHS compliant
The Si4701 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. Using this feature, the
Si4701 enables data such as station identification and
song name to be displayed to the user.
Applications
- Cellular handsets
- MP3 players
- PDAs, Notebook PCs
- Portable radios
- USB FM radio
Headphone
Cable
Si4700/01
DSP
I
LOUT
DAC
DAC
GPIO
ADC
FMIP
FILTER
DEMOD
MPX
PGA
FMIN
Q
ADC
ROUT
GPIO
AUDIO
AGC
TUNE
REG
0 / 90
LOW-IF
32.768 kHz
2.7 - 5.5 V
VIO
RST
RDS
(Si4701)
RCLK
AFC
SDIO
SCLK
SEN
VA
VD
RSSI
FM Tuner
Copyright © 2005 by Silicon Laboratories
7.11.05
Si4700/01
Broadcast FM Radio Tuner for Portable Applications
Selected Electrical Specifications
Parameter
Input Frequency
Symbol
Test Condition
Min
76
—
Typ
—
Max
108
3.5
—
Unit
MHz
fRF
Sensitivity
(S+N)/N = 26 dB
2.5
15
µV EMF
µV EMF
dBµV
RDS Sensitivity
Input IP3
∆f = 2 kHz, RDS BLER = 5%
—
|f2 – f1| > 1 MHz; f0 = 2 x f1 – f2
AGC disabled
—
108
—
Adjacent Channel Selectivity
Alternate Channel Selectivity
RCLK Frequency
±200 kHz
±400 kHz
35
60
50
70
—
—
dB
dB
—
32.768
—
—
kHz
ppm
mVrms
Hz
RCLK Frequency Tolerance
Audio Output Voltage
Audio Band Limits
Audio S/N
–200
72
200
90
80
0 to –3 dB
30
—
15k
63
dB
Audio THD
—
2.7
1.5
–20
—
—
—
0
0.1
—
0.5
5.5
3.6
85
%
Supply Voltage
VD, VA
VIO
TA
V
Interface Supply Voltage
Ambient Temperature
Supply Current
—
V
25
°C
IAD
17.6
4
—
mA
Powerdown Current
Seek Time
IPD
20
µA
—
40
ms/channel
MHz
kHz
ms
SCLK Frequency
fCLK
fSCL
3-wire operation
2-wire operation
From powerdown
—
2.5
400
50
0
—
Powerup Time
—
—
Package Information
Pin Assignments
24 23 22 21 20 19
GND
FMIP
1
18 VA
2
17 GND
16 LOUT
15 ROUT
14 GND
13 VD
RFGND
FMIN
3
GND
PAD
4
5
6
GND
GND
7
8
9
10 11 12
Symbol
Millimeters
Symbol
Millimeters
Min
0.80
0.00
0.18
Nom
0.85
Max
0.90
0.05
0.30
Min
Nom
0.40
0.05
—
Max
0.50
0.08
0.10
0.10
0.08
0.10
A
A1
L
0.30
0.03
—
0.02
L1
b
0.25
aaa
bbb
ccc
ddd
D, E
D2, E2
e
4.00 BSC
2.30
—
—
2.20
2.40
—
—
0.50 BSC
—
—
FM Tuner
Copyright © 2005 by Silicon Laboratories
7.11.05
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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