Silicon Laboratories SI4830 User manual

AM/FM Receiver Copyright © 2010 by Silicon Laboratories 2.24.2010
Si4830
Broadcast Mechanical Tuning AM/FM Radio Receiver
Description
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.
Like other successful audio products from Silicon Labs,
Si4830 offers unmatched integration and PCB space
savings with minimum external components and less than
20 mm2of board area, excluding the antenna inputs. 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 digital tuning to the
legacy analog radio market.
Features
-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
-Table and portable radios
-Stereos
-Mini/micro systems
-Boomboxes
-Clock radios
-Modules
-Entertainment systems
-Toys, lamps, and any application needing an AM/FM
radio
ADC
ADC
Si4830
DSP
DAC
DAC ROUT
LOUT
AFC
TUNE1/2
RFGND LNA
AMI
AGC
REG
VDD
2.0~3.6V XTAL
OSC
FMI 0/90
STEREO
XTALO
STATION
BAND
CONTROL
INTERFACE
RST
XTALI
AM
ANT
FM
ANT

AM/FM Receiver Copyright © 2010 by Silicon Laboratories 2.24.2010
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
Si4830
Broadcast Mechanical Tuning AM/FM Radio Receiver
Selected FM Electrical Specifications
Selected AM Electrical Specifications
Parameter Symbol Conditions Min Typ Max Units
Input Frequency fRF 64 —108 MHz
Sensitivity (S+N)/N = 26 dB —2.2 —µV EMF
Input IP3 —105 —dBµV EMF
Adjacent Channel Selectivity ±200 kHz —50 —dB
Alternate Channel Selectivity ±400 kHz —65 —dB
Audio Output Voltage —80 —mVRMS
Audio S/N —53 —dB
Audio THD —0.1 0.5 %
Parameter Symbol Conditions Min Typ Max Units
Input Frequency fRF 520 —1710 kHz
Sensitivity (S+N)/N = 26 dB —25 —µV EMF
Audio S/N —56 —dB
Audio Output Voltage —60 —mVRMS
Audio THD —0.1 — %
Antenna Inductance 180 —450 μH
Package Information
Table 1. Package Dimensions
Dimension Min Nom Max Dimension Min Nom Max
A — — 1.75 L 0.40 — 1.27
A1 0.10 — 0.25 L2 0.25 BSC
b 0.20 — 0.30 θ0° — 8°
c 0.10 — 0.25 aaa 0.20
D 8.65 BSC bbb 0.18
E 6.00 BSC ccc 0.10
E1 3.90 BSC ddd 0.10
e 0.635 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-137, Variation
AE.
4. Recommended card reflow profile is per the JEDEC/IPC J-STD-020
specification for Small Body Components.
Pin Assignments
LOUT
ROUT
DBYP
VDD1
TUNE2
XTALO
Stereo
BAND
1
2
3
4
5
6
7
8
9
10
11
12
TUNE1
VDD2
Station
NC
NC
XTALI
RSV1
FMI
RFGND
RSV2
GND
NC
NC
RST
GND
AMI
24
23
22
21
20
19
18
17
16
15
14
13