Si4734-35 Data Short
Si4734/35
Broadcast AM/FM/SW/LW Radio Receiver
Description
Features
The Si4734/35 is the industry's first fully integrated, 100%
CMOS AM/FM/SW/LW radio receiver IC. Offering
unmatched integration and PCB space savings, the
Si4734/35 requires minimal external components and less
than 20 mm2 of board area, excluding the antenna inputs.
The Si4734/35 AM/FM/SW/LW radio provides the space
savings and low power consumption necessary for portable
devices while delivering the high performance and design
simplicity desired for all AM/FM/SW/LW solutions.
Leveraging Silicon Laboratories' proven and patented
Si4700/01 FM tuner's digital low intermediate frequency
(low-IF) receiver architecture, the Si4734/35 delivers
superior RF performance and interference rejection in AM,
FM, and short wave and long wave bands. The high
integration and complete system production test simplifies
design-in, increases system quality, and improves
manufacturability.
The Si4734/35 is a feature-rich solution including
advanced seek algorithms, soft mute, auto-calibrated
digital tuning, and FM stereo processing. In addition, the
Si4734/35 provides analog or digital audio output and a
programmable reference clock. The device supports I2Ccompatible 2-wire control interface, SPI, and a Si4700/01
backwards-compatible 3-wire control interface.
The Si4734/35 utilizes digital processing to achieve high
fidelity, optimal performance, and design flexibility. The
chip provides excellent pilot rejection, selectivity, and
unmatched audio performance, and offers both the
manufacturer and the end-user extensive programmability
and flexibility in the listening experience.
The Si4735 incorporates a digital processor for the
European Radio Data System (RDS) and the North
American Radio Broadcast Data System (RBDS), including
all required symbol decoding, block synchronization, error
detection, and error correction functions. Using RDS, the
Si4735 enables broadcast data such as station
identification and song name to be displayed to the user.
-
Worldwide FM band support (64–108 MHz)
Worldwide AM band support(520–1710 kHz)
SW band support (2.3–21.85 MHz)
LW band support (153–279 KHz)
Excellent real-world performance
Freq synthesizer with integrated VCO
Automatic frequency control (AFC)
Automatic gain control (AGC)
Integrated LDO regulator
Digital FM stereo decoder
Programmable de-emphasis
Adaptive noise suppression
AM/FM/SW/LW digital tuning
No manual alignment necessary
Adjustable channel filters
EN55020 complaint
Programmable reference clock
Digital volume control
Adjustable soft mute control
RDS/RBDS processor (Si4735 only)
Optional digital audio out (Si4735 only)
2-wire and 3-wire control interface
2.7 to 5.5 V supply voltage
Wide range of ferrite loop sticks and air loop antennas
supported
- 3 x 3 x 0.55 mm 20-pin QFN package
- Pb-free/RoHS compliant
Applications
-
Table and portable radios
Stereos
Mini/micro systems
Portable media players
Boomboxes
Clock radios
Modules
Entertainment systems
Cellular handsets
FM/SW
ANT
Si4734/35
FMI
RDS
(Si4735)
LNA
LOW-IF
AGC
ADC
LNA
2.7–5.5 V
ADC
AFC
RCLK
LDO
AM/FM Receiver
ROUT
DAC
LOUT
DSP
VDD
GND
DFS
GPO/DCLK
CONTROL
INTERFACE
VIO
1.5–3.6 V
RST
AGC
DOUT
DAC
SDIO
RFGND
SEN
AMI
SCLK
AM/LW
ANT
DIGITAL
AUDIO
(Si4735)
Copyright © 2008 by Silicon Laboratories
4.1.08
Si4734/35
Broadcast AM/FM/SW/LW Radio Receiver
Selected FM Electrical Specifications
Parameter
Symbol
Input Frequency
fRF
Sensitivity headphone matching
Sensitivity 50  matching
Input IP3
Adjacent Channel Selectivity
Alternate Channel Selectivity
Audio Frequency Reponse Low
Audio Frequency Reponse High
Audio Mono S/N
Audio THD
Audio Output Voltage
Supply Voltage*
VD, VA
Interface Supply Voltage*
VIO
Powerdown Current*
IPD
*Note: Applies to both FM and AM modes.
Test Condition
(S+N)/N = 26 dB
(S+N)/N = 26 dB
|f2 – f1| > 1 MHz; f0 = 2 x f1 – f2
±200 kHz
±400 kHz
–3 dB
–3 dB
Min
76
—
—
—
—
—
—
15
—
—
72
2.7
1.5
—
Typ
—
2.2
1.1
105
50
70
—
—
63
0.1
80
—
—
10
Max
108
—
—
—
—
—
30
—
—
—
90
5.5
3.6
—
Unit
MHz
µV EMF
µV EMF
dBµV EMF
dB
dB
Hz
kHz
dB
%
mVrms
V
V
µA
Min
520
2.3
153
—
—
—
54
Typ
—
—
—
25
56
0.1
60
Max
1710
21.85
279
—
—
—
66
Unit
kHz
MHz
kHz
µV EMF
dB
%
mVrms
Selected AM/SW/LW Electrical Specifications
Parameter
Input Frequency
Symbol
fRF
Test Condition
Medium wave (AM)
Short wave (SW)
Long wave (LW)
(S+N)/N = 26 dB
Sensitivity
Audio S/N
Audio THD
Audio Output Voltage
GPO2/INT
GPO3/DCLK
DFS
1
GPO1
NC
NC
Pin Assignments
20
19
18
17
16
FMI 2
3 x 3 x 0.55 mm, 20-pin QFN Package Information
15 DOUT
RFGND 3
14 LOUT
GND
PAD
AMI 4
13 ROUT
6
7
8
9
10
SCLK
SDIO
RCLK
VIO
12 GND
SEN
RST 5
11 VDD
Symbol
A
A1
b
c
D
D2
e
E
E2
AM/FM Receiver
Millimeters
Symbol
Min
Nom
Max
0.50
0.00
0.18
0.27
0.55
0.02
0.25
0.32
3.00 BSC
1.70
0.50 BSC
3.00 BSC
1.70
0.60
0.05
0.30
0.37
1.60
1.60
1.80
f
L
L1
aaa
bbb
ccc
ddd
eee
Millimeters
Min
Nom
Max
0.35
0.00
—
—
—
—
—
2.53 BSC
0.40
—
—
—
—
—
—
0.45
0.10
0.10
0.10
0.08
0.10
0.10
1.80
Copyright © 2008 by Silicon Laboratories
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
4.1.08
Smart.
Connected.
Energy-Friendly
Products
Quality
Support and Community
www.silabs.com/products
www.silabs.com/quality
community.silabs.com
Disclaimer
Silicon Laboratories intends to provide customers with the latest, accurate, and in-depth documentation of all peripherals and modules available for system and software implementers
using or intending to use the Silicon Laboratories products. Characterization data, available modules and peripherals, memory sizes and memory addresses refer to each specific
device, and "Typical" parameters provided can and do vary in different applications. Application examples described herein are for illustrative purposes only. Silicon Laboratories
reserves the right to make changes without further notice and limitation to product information, specifications, and descriptions herein, and does not give warranties as to the accuracy
or completeness of the included information. Silicon Laboratories shall have no liability for the consequences of use of the information supplied herein. This document does not imply
or express copyright licenses granted hereunder to design or fabricate any integrated circuits. The products must not be used within any Life Support System without the specific
written consent of Silicon Laboratories. A "Life Support System" is any product or system intended to support or sustain life and/or health, which, if it fails, can be reasonably expected
to result in significant personal injury or death. Silicon Laboratories products are generally not intended for military applications. Silicon Laboratories products shall under no
circumstances be used in weapons of mass destruction including (but not limited to) nuclear, biological or chemical weapons, or missiles capable of delivering such weapons.
Trademark Information
Silicon Laboratories Inc., Silicon Laboratories, Silicon Labs, SiLabs and the Silicon Labs logo, CMEMS®, EFM, EFM32, EFR, Energy Micro, Energy Micro logo and combinations
thereof, "the world’s most energy friendly microcontrollers", Ember®, EZLink®, EZMac®, EZRadio®, EZRadioPRO®, DSPLL®, ISOmodem ®, Precision32®, ProSLIC®, SiPHY®,
USBXpress® and others are trademarks or registered trademarks of Silicon Laboratories Inc. ARM, CORTEX, Cortex-M3 and THUMB are trademarks or registered trademarks of
ARM Holdings. Keil is a registered trademark of ARM Limited. All other products or brand names mentioned herein are trademarks of their respective holders.
Silicon Laboratories Inc.
400 West Cesar Chavez
Austin, TX 78701
USA
http://www.silabs.com
Was this manual useful for you? yes no
Thank you for your participation!

* Your assessment is very important for improving the work of artificial intelligence, which forms the content of this project

Download PDF

advertisement