Si4702/03-C19
Broadcast FM Radio Tuner for Portable Applications
Description
The Si4702/03-C19 extends Silicon Laboratories Si4700/
01 FM tuner family and further increases the ease and
attractiveness of adding FM radio reception to mobile
devices through small size and board area, minimum
component count, flexible programmability, and superior,
proven performance. The Si4702/03 leverage Silicon
Laboratories' highly successful and patented Si4700/01 FM
tuner, and are pin and software compatible to existing
Si4700/01 FM tuner designs. The Si4702/03 benefits from
proven digital integration and 100% CMOS process
technology, resulting in a completely integrated solution.
The Si4702/03 proven and highly flexible functionality
caters to the subjective nature of audio preferences and
variable FM broadcast environments worldwide.
The Si4703-C19 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 Si4703 offers a detailed RDS view and a
standard view, allowing adopters to selectively choose
granularity of RDS status, data, and block errors. Si4703
software is backwards compatible to the proven Si4701,
adopted by leading cell-phone, PND, and MP3
manufacturers worldwide.
The Si4702/03 device’s high level of integration and
complete FM system increases quality to manufacturers,
improves
device
yields,
and
simplifies
device
manufacturing and final testing.
Features
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
2-wire and 3-wire control interface
2.7 to 5.5 V supply voltage
Integrated LDO regulator allows direct connection
to battery
-
3 x 3 mm 20-pin QFN package
-
Pb-free/RoHS compliant
-
RDS/RBDS Processor (Si4703)
-
Integrated crystal oscillator
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Applications
-
-
-
-
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-
-
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Cellular handsets
MP3 players
Portable radios
USB FM radio
PDAs
Notebook PCs
Portable navigation
Consumer electronics
Headphone
Cable
FMIP
RFGND
LNA
PGA
Q
ADC
I
ADC
Si4702/03
DAC
FILTER
DEMOD
MPX
AUDIO
DAC
ROUT
AGC
32.768 kHz
0 / 90
LOW-IF
GPIO
GPIO
VIO
CONTROL
INTERFACE
RCLK
2.7–5.5 V
VA
VD
TUNE
AFC
RDS
(Si4703)
RST
SDIO
SCLK
SEN
REG
XTAL
OSC
RSSI
FM Tuner
Copyright © 2008 by Silicon Laboratories
CONTROLLER
AMPLIFIER
DSP
LOUT
4.3.08
Si4702/03-C19
Broadcast FM Radio Tuner for Portable Applications
Selected Electrical Specifications
Parameter
Input Frequency
Sensitivity
Input IP3
Adjacent Channel Selectivity
Alternate Channel Selectivity
RCLK Frequency
RCLK Frequency Tolerance
Audio Output Voltage
Audio Band Limits
Audio S/N
Audio THD
Supply Voltage
Interface Supply Voltage
Ambient Temperature
Supply Current
Powerdown Current
Seek/Tune Time
SCLK Frequency
Powerup Time
f
CLK
f
SCL
3-wire operation
2-wire operation
From powerdown
V
D
, V
A
V
IO
T
A
I
AD
I
PD
±1.5 dB
Symbol
f
RF
(S+N)/N = 26 dB
|f
2
– f
1
| > 1 MHz; f
0
= 2 x f
1
– f
2
AGC disabled
±200 kHz
±400 kHz
Test Condition
Min
76
—
—
—
—
—
–200
72
30
—
—
2.7
1.5
–20
—
—
—
—
—
—
Typ
—
1.1
106
50
70
32.768
—
80
—
59
0.1
—
—
25
14.4
8.5
—
—
—
—
Max
108
—
—
—
—
—
200
90
15k
—
0.5
5.5
3.6
85
—
12
60
2.5
400
110
Unit
MHz
µV EMF
dBµV EMF
dB
dB
kHz
ppm
mVrms
Hz
dB
%
V
V
°C
mA
µA
ms/channel
MHz
kHz
ms
Pin Assignments
GPIO1
GPIO2
GPIO3
NC
V
A
Package Information
NC
FMIP
RFGND
GND
RST
1
2
3
4
5
6
SEN
20
19
18
17
16
15 GND
GND
PAD
14 LOUT
13 ROUT
12 GND
7
SCLK
8
SDIO
9
RCLK
10
V
IO
11 V
D
Table 1. Package Dimensions
Symbol
A
A1
b
c
D
D2
e
E
E2
Min
0.50
0.00
0.18
0.27
1.65
Millimeters
Nom
0.55
0.02
0.25
0.32
3.00 BSC
1.70
0.50 BSC
3.00 BSC
1.70
Symbol
Max
0.60
0.05
0.30
0.37
1.75
Min
f
L
L1
aaa
bbb
ccc
ddd
eee
0.35
0.00
—
—
—
—
—
Millimeters
Nom
2.53 BSC
0.40
—
—
—
—
—
—
Max
0.45
0.10
0.10
0.10
0.08
0.10
0.10
1.65
1.75
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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