Si475x-A10
High Performance Automotive AM/FM Radio Receiver
Description
The Si475x radio receiver family employs RF CMOS
technology to bring outstanding radio receiver performance
and automotive quality to the automotive infotainment
industry. The Si475x family supports worldwide FM, AM,
shortwave, longwave, and weatherband radio reception.
The Si475x receiver system specifies a minimal bill of
materials, resulting in a very small board space
requirement, making the solution ideal for any automotive
application from single tuner radios to multiple tuner radios
addressing companion TMC/AF reception/scanning.
The monolithic IC incorporates a digital signal processor
and microcontroller, leveraging Silicon Laboratories
patented and proven low-IF architecture, delivering
superior RF performance and interference rejection, as
well as excellent sensitivity in weak signal environments
and superb selectivity and inter-modulation immunity in
strong signal environments. The device performs signal
conditioning with dynamic AM/FM channel bandwidth
control, a comprehensive set of weak signal processing
engines, auto-calibrated digital tuning, and proven AM/FM
seek functionality based on multiple signal quality and
band parameters. The device offers world-class
performance for complete Radio Data Service (RDS)
decoding, synchronization, error detection and correction.
The device is also completely configurable, allowing raw
RDS data if so desired.
The part provides an integrated clock oscillator or accepts
a reference clock and an I
2
C-compatible 2-wire control
interface.
Features
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Worldwide FM band support (64–108 MHz)
Worldwide AM band support (520–1710 kHz)
Advanced RDS/RBDS demodulator/decoder
Digital FM MPX decoder
Integrated FM loop-through
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Addresses companion AF/RDS data receiver
Advanced AM/FM noise blankers
Dynamic AM/FM channel bandwidth control
Advanced FM hi-cut control
Programmable FM stereo-mono blend
Programmable AM/FM soft mute
Full suite of signal metrics: RSSI, SNR, multi-path
interference, frequency offset, adjacent channel strength
Analog audio outputs
Analog FM MPX output
Low-IF architecture
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Eliminates expensive 10.7 MHz IF ceramic filters
On-chip AM/FM AGC with integrated resistor and
varactor banks
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Eliminates external PIN diode attenuators
1.5 to 5 V power supplies
QFN 32, 5 x 5 x0.85 mm
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Pb-free/RoHS compliant
AEC-Q100 qualified
Applications
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OEM Car Radio Systems
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Aftermarket Car Radio Systems
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OEM Car PND Docking System
FMAGC1
FMAGC2
ADC
DAC
LOUT/MPXOUT
ROUT
DSP
FMXI
RF PKD
RFREG
FMO
FMI
RF PKD
RF PKD
AMI
RFGND
LNA
REG
R
L
LNA
0°/90°
IF PKD
ADC
CIK
Gen
RCLK/XTAL1
XTAL2
Si475x
RDS
CNTRL
INTB
RSTB
VIO
Automotive AM/FM Tuner
Copyright © 2010 by Silicon Laboratories
A0
A1
SDA
SCL
DAC
11.16.10
Si4750/51-A10
Selected Electrical Specifications
Parameter
Ambient temperature
Analog supply voltage 5 V (VA)
Digital supply voltage 3.3 V (VD)
Interface supply voltage (VIO)
Analog supply current
Digital supply current
Interface supply current (VIO)
FM
Input frequency
Tune time
AF scan time
Seek time/channel
Max frequency deviation
Maximum RF input voltage
AM
Input frequency
Seek time/channel
Maximum RF input voltage
510
50
145
1710
kHz
msec
dBuV
64
0.9
8
35
150
130
108
MHz
msec
msec
msec
kHz
dBuV
Test Conditions
Min
–40
4.5
2.7
1.7
Typ
25
5
Max
85
5.5
3.6
3.6
Units
°C
V
V
V
mA
mA
mA
150
50
5
Package Outline
Dimensions
AT
A1
b
D
D2
e
E
Notes:
1.
2.
3.
4.
Min
0.80
0.00
0.18
Nom
0.85
0.02
0.25
5.00 BSC.
Max
0.90
0.05
0.30
Dimensions
E2
L
aaa
bbb
Min
3.50
0.35
—
—
—
—
Nom
3.60
0.40
—
—
—
—
Max
3.70
0.45
0.15
0.10
0.05
0.08
3.45
3.60
0.50 BSC.
5.00 BSC.
3.75
ddd
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All dimensions shown are in millimeters (mm) unless otherwise noted.
Dimensioning and Tolerancing per ANSI Y14.5M-1994.
This drawing conforms to the JEDEC Solid State Outline MO-220, variation VHHD except for custom features D2, E2, L, and L1 which are
toleranced per supplier designation.
Recommended card reflow profile is per the JEDEC/IPC J-STD-020 specification for Small Body Components.
Automotive AM/FM Tuner
Copyright © 2010 by Silicon Laboratories
11.16.10
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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