Silicon Laboratories Lawn Mower SI4830 User Guide

Si4830  
Broadcast Mechanical Tuning AM/FM Radio Receiver  
Description  
Features  
The Si4830 is the first wheel-tuned digital CMOS AM/FM  
radio receiver IC that integrates the complete receiver  
function from antenna input to audio output. Leveraging  
Silicon Laboratories' proven and patented digital low  
intermediate frequency (low-IF) receiver architecture, the  
Si4830 delivers superior RF performance and interference  
rejection in both AM and FM bands. Additionally, the digital  
core provides advanced audio conditioning for all  
environments, removing pops, clicks, and loud static in  
variable signal conditions. The superior control algorithm  
integrated in Si4830 provides easy and reliable control  
interface while eliminating all the manual tuned external  
components used in traditional solutions.  
- Worldwide FM band support (64–108 MHz)  
- Worldwide AM band support (520–1710 kHz)  
- Selectable support for all AM/FM regional bands  
- Wheel-tuned / Mechanical-tuned frequency support  
- Mechanical volume control + off/on  
- Excellent real-world performance  
- Digital radio with leading low-IF architecture  
- Automatic frequency control (AFC)  
- Stereo/mono + tuning and stereo indicator  
- EN55020 compliant  
- Minimal BOM components w/ no manual alignment  
- No external MCU required  
- Two AAA batteries with 2.0 to 3.6 V supply voltage  
(T = 25° C)  
- Wide range of ferrite loop sticks and air loop antennas  
- 24-pin SSOP package  
- RoHS compliant  
Applications  
Like other successful audio products from Silicon Labs,  
Si4830 offers unmatched integration and PCB space  
savings with minimum external components and less than  
2
20 mm of board area, excluding the antenna inputs. The  
- Table and portable radios  
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 digital tuning to the  
legacy analog radio market.  
- Stereos  
- Mini/micro systems  
- Boomboxes  
- Clock radios  
- Modules  
- Entertainment systems  
- Toys, lamps, and any application needing an AM/FM  
radio  
Si4830  
ADC  
ADC  
DAC  
AMI  
LOUT  
ROUT  
AM  
ANT  
LNA  
DSP  
RFGND  
DAC  
FM  
ANT  
AGC  
FMI  
0/90  
TUNE1/2  
XTALO  
CONTROL  
INTERFACE  
AFC  
REG  
XTALI  
2.0~3.6V  
STEREO  
STATION  
VDD  
XTAL  
OSC  
AM/FM Receiver  
Copyright © 2010 by Silicon Laboratories  
2.24.2010  
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