Silicon Laboratories SI4830 User Manual

Si4830

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

Broadcast Mechanical Tuning AM/FM Radio Receiver

Description

The Si4830 is the first wheel-tuned digital CMOS AM/FM

o receiver IC that integrates the complete receiver

radi
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,

30 offers unmatched integration and PCB space

Si48
savings with minimum external components and less than

2

20 mm
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.

of board area, excluding the antenna inputs. The

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

AM/FM Receiver Copyright © 2010 by Silicon Laboratories 2.24.2010

Si4830

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

Broadcast Mechanical Tuning AM/FM Radio Receiver

Selected FM Electrical Specifications

Parameter Symbol Conditions Min Typ Max Units

Input Frequency f
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 — mV
Audio S/N — 53 — dB
Audio THD — 0.1 0.5 %

Selected AM Electrical Specifications

Parameter Symbol Conditions Min Typ Max Units

Input Frequency f
Sensitivity (S+N)/N = 26 dB — 25 — µV EMF
Audio S/N — 56 — dB
Audio Output Voltage — 60 — mV
Audio THD — 0.1 — %
Antenna Inductance 180 — 450 μH

RF

RF

64 — 108 MHz

RMS

520 — 1710 kHz

RMS

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 θ 0° — 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 T olerancing 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

AM/FM Receiver Copyright © 2010 by Silicon Laboratories 2.24.2010

Other products or brandnames mentioned herein are trademarks or registered trademarks of their respective holders

Silicon Laboratories and Silicon Labs are trademarks of Silicon Laboratories Inc.