SI4770-A20 Datasheet, PDF (1/3 Pages) Silicon Laboratories – High-Performance Consumer Electronics Broadcast Radio Receiver and HD Radio Tuner

Si4770/77-A20
High-Performance Consumer Electronics
Broadcast Radio Receiver and HD Radio Tuner
Description
The Silicon Labs Si4770/77-A20 represents the world's first
high performance single-chip mixed signal CMOS receiver
targeting high-end consumer electronics. The device is a
true all-in-one chip, receiving RF with zero-BOM
implementation, and performing all required demodulation
and signal conditioning to provide digital I²S audio and / or
left and right analog audio out. The Si4777 also supports
AM/FM HD radio channel reception with digital (I²S) zero-IF
(ZIF) I/Q outputs for interface to an HD radio processor.
The Si4770/77-A20 leverages Silicon Labs' long and
proven history of delivering mixed signal low-intermediate-
frequency (low-IF) ICs. The low-IF digital architecture and
leading mixed signal design provide superior RF
performance and interference rejection in a highly
integrated, single chip device. As the leader in mixed signal
CMOS, Silicon Labs has now shipped over 2 billion such
devices.
The fully integrated analog chain receives analog broadcast
bands including AM and FM. The solution offers superior
on-chip filtering and signal conditioning, and incorporates
automatic channel bandwidth adjustment, sub-2 msec tune
time and corresponding very fast seek time, highly effective
seek algorithms, and advanced audio conditioning including
programmable soft mute, multi-path mitigation /
cancellation, stereo-mono blend and hi-cut / lo-cut.
The Si4770/77-A20 also incorporates the world's leading
FM R(B)DS decoder, including all required symbol
decoding, block synchronization, error detection, and error
correction functions.
Features
- Worldwide FM band support 
(64–108 MHz)
- Worldwide AM band support (520–1710 kHz)
- Comprehensive signal quality metrics: RSSI, SNR, mul-
tipath interference, frequency offset, adjacent channel
RSSI, frequency deviation, and image RSSI
- Advanced patented RDS soft-decision decoder
- Advanced, patented FM channel equalizer for multipath
interference
- Dynamic AM/FM channel bandwidth control
- Programmable AM/FM soft mute
- FM stereo-mono blend
- FM hi-blend control
- AM/FM hi-cut control
- AM lo-cut filter
- L/R analog and digital (I²S) audio outputs
- Digital (I²S) zero-IF AM/FM I/Q outputs (Si4777 only)
- Digital Low-IF architecture
- Frequency synthesizer with fully integrated PLL-VCO
- Fully integrated AM/FM front-end including high perfor-
mance LNA, AGC with integrated resistor and capacitor
banks, and RF and IF peak detectors
- Integrated crystal oscillator
- 1.2 to 5 V power supplies
- QFN 40-pin, 6x6x0.85 mm
- Pb-free/RoHS compliant
Applications
- Audio/video receivers
- Consumer electronics
- Boom boxes
- Home theater systems
Si4770/77
FMXIP
FMXIN
RFREG
FMO
REG
RL
LNA
FMI
RF PKD
RF PKD
AMI
RFGND
RF PKD
0°/90°
LNA
ADC
IF PKD
ADC
ClK
Gen
DAC
DSP
DAC
RDS
LOUT/
MPXOUT
ROUT
DCLK
DFS
DOUT
CNTRL
INTB
RSTB
VIO1
VIO2
AM/FM Receiver and HD-R Tuner Copyright © 2012 by Silicon Laboratories
06.12.12