SI4840 Datasheet, PDF (1/3 Pages) Silicon Laboratories – Broadcast Analog Tuning Digital Display AM/FM/SW Radio Receiver

Si4840/44
Broadcast Analog Tuning Digital Display AM/FM/SW Radio Receiver
Description
The Si4840/44 is the first analog-tuned digital-display
(ATDD) CMOS AM/FM/SW radio receiver IC that integrates
the complete receiver function from antenna input to audio
output. The Si4840/44 implements Silicon Labs' proven
low-IF digital architecture, providing an easy and reliable
control interface while eliminating all the manual tuned
external components used in traditional solutions. The
architecture also provides the industry's leading receiver
performance, with excellent sensitivity and selectivity in all
supported bands. The Si4840/44 uses a simple
potentiometer to provide an analog-tuning interface, and
outputs the highly-accurate tuned frequency to a
companion MCU / display driver via I²C-compatible, 2-wire
control interface. The device supports industry-leading
features for band selection, Bass/Treble boost, European
EN 55020/22 and U.S. FCC compliance, and advanced
audio conditioning for all signal environments to remove
pops, clicks, and abrasive static. The device also supports
interrupts for valid tuned frequencies and stereo/mono
signal quality. These features provide a superb and highly
reliable user experience. Like other successful audio
products from Silicon Labs, the Si4840/44 offers
unmatched integration and PCB space savings with
minimum external components and small board area on a
single side PCB. The high integration and complete system
production test simplifies design-in, increases system
quality, and improves manufacturability. The receiver has
very low power consumption, runs off two AAA batteries,
and delivers the performance benefits of high performance
digital radio effect with digital display to the legacy analog-
tuned radio market.
Features
- Worldwide FM band support (64–109 MHz)
- Worldwide AM band support (504–1750 kHz)
- SW band support (Si4844 only) (2.3–28.5 MHz)
- Selectable support for all AM/FM/SW regional bands
- 2-wire control interface
- Flexible Mono/Stereo control and programmability
- Digital volume control support
- Excellent real-world performance
- Automatic frequency control (AFC)
- EN55020 compliant
- Minimal BOM components with no manual alignment
- Two AAA batteries with 2.0 to 3.6 V supply voltage
- Wide range of ferrite loop sticks and air loop antennas
- 24-pin SSOP package
- RoHS compliant
Applications
- Table and portable radios
- Stereos
- Mini/micro systems
- Boomboxes
- Clock radios
- Modules
- Entertainment systems
- Toys, lamps, and any application needing an AM/FM
radio
AM
ANT
FM
ANT
AMI
RFGND
FMI
LNA
AGC
0/90
XTALI
2.0~3.6V VDD1/2
AFC
REG
XTAL
OSC
Si48S3i408/344x
ADC
DAC
LOUT
DSP
ADC
DAC
ROUT
ADC
CONTROL
INTERFACE
TUNE1/2
BAND
AM/FM/SW Receiver
Copyright © 2011 by Silicon Laboratories
6.13.2011