Automotive AM/FM Tuner Copyright © 2010 by Silicon Laboratories 11.16.10
LNA
REG
ROUT
LOUT/MPXOUT
INTB
RSTB
VIO
RFGND
AMI
FMI
FMO
RFREG
FMXI
FMAGC1 FMAGC2
RL
RCLK/XTAL1
XTAL2
A0
A1
SDA
SCL
Si475x
0°/90°
IF PKD
LNA
RDS
CNTRL
CIK
Gen
RF PKD
RF PKD
ADC ADC
DAC DAC
DSP
RF PKD
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 mul tiple tuner radios
addressing companion TMC/AF recep ti o n/ sca nn i n g.
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 I2C-compatible 2-wire control
interface.
Features
-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
-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
-Eliminates expensive 10.7 MHz IF ceramic filters
-On-chip AM/FM AGC with integrated resistor and
varactor banks
-Eliminates external PIN diode attenuators
-1.5 to 5 V power supplies
-QFN 32, 5 x 5 x0.85 mm
-Pb-free/RoHS compliant
-AEC-Q100 qualified
Applications
-OEM Car Radio Systems
-Aftermarket Car Radio Systems
-OEM Car PND Docking System
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.
Si4750/51-A10
Selected Electrical Specifications
Parameter Test Conditions Min Typ Max Units
Ambient temperature –40 25 85 °C
Analog supply voltage 5 V (VA) 4.5 5 5.5 V
Digital supply voltage 3.3 V (VD) 2.7 3.6 V
Interface supply voltage (VIO) 1.7 3.6 V
Analog supply current 150 mA
Digital supply current 50 mA
Interface supply current (VIO) 5mA
FM
Input frequency 64 108 MHz
Tune time 0.9 msec
AF scan time 8msec
Seek time/channel 35 msec
Max frequency deviation 150 kHz
Maximum RF input voltage 130 dBuV
AM
Input frequency 510 1710 kHz
Seek time/channel 50 msec
Maximum RF input voltage 145 dBuV
Package Outline
Dimensions Min Nom Max Dimensions Min Nom Max
AT 0.80 0.85 0.90 E2 3.50 3.60 3.70
A1 0.00 0.02 0.05 L 0.35 0.40 0.45
b 0.18 0.25 0.30 aaa — — 0.15
D 5.00 BSC. bbb — — 0.10
D2 3.45 3.60 3.75 ddd — — 0.05
e 0.50 BSC. eee — — 0.08
E 5.00 BSC.
Notes:
1. All dimensions shown are in millimeters (mm) unless otherwise noted.
2. Dimensioning and Tolerancing per ANSI Y14. 5M-1994.
3. 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.
4. Recommended card reflow profi l e is per the JEDEC/IPC J-STD-020 specification for Small Body Component s.
