IC RX AM/FM/SW/LW RAD RDS 20UQFN

SI4735-B20-GM

Manufacturer Part NumberSI4735-B20-GM
DescriptionIC RX AM/FM/SW/LW RAD RDS 20UQFN
ManufacturerSilicon Laboratories Inc
SI4735-B20-GM datasheet
 


Specifications of SI4735-B20-GM

Package / Case20-UQFN, 20-µQFNFrequency153kHz ~ 279kHz, 520kHz ~ 1.71MHz, 2.3MHz ~ 21.85MHz, 64MHz ~ 108MHz
Modulation Or ProtocolAM, FM, LW-SW, WBApplicationsGeneral Purpose
Current - Receiving19.9mAData InterfacePCB, Surface Mount
Antenna ConnectorPCB, Surface MountFeaturesRSSI Equipped
Voltage - Supply2.7 V ~ 5.5 VOperating Temperature-20°C ~ 85°C
Bus TypeI2CMaximum Frequency108 MHz, 1710 MHz
Minimum Frequency76 MHz, 520 MHzModulation TechniqueAM, FM
Mounting StyleSMD/SMTFunctionRadio
Supply Voltage (min)2.7 VSupply Voltage (max)5.5 V
Minimum Operating Temperature- 20 CMaximum Operating Temperature+ 85 C
Lead Free Status / RoHS StatusLead free / RoHS CompliantSensitivity-
Memory Size-Data Rate - Maximum-
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B
M
ROADCAST
ULTI
Features
FM band support: 76–108 MHz
AM band support: 520–1710 kHz
SW band support: 2.3–21.85 MHz
(Si4734/35)
LW band support: 153–279 kHz
(Si4734/35)
Weather band support: 162.4–
162.55 MHz (Si4736/37/38/39)
1050 Hz alert tone detection
(Si4736/37/38/39)
Excellent real-world performance
Freq synthesizer with integrated VCO
Advanced seek tuning
Automatic frequency control (AFC)
Automatic gain control (AGC)
Integrated LDO regulator
Digital FM stereo decoder
Programmable de-emphasis
Applications
Table and portable radios
Audio video receivers
Stereos
Mini/micro systems
CD/DVD players
Portable media players
Si473x Product Selector Guide
Part
FM
Si4730
76 – 108 MHz
Si4731
76 – 108 MHz
Si4734
64 – 108 MHz
Si4735
64 – 108 MHz
Si4736
76 – 108 MHz
Si4737
76 – 108 MHz
Si4738
76 – 108 MHz
Si4739
76 – 108 MHz
Rev. 0.5 10/08
-B
R
R
AND
ADIO
ECEIVER
Adaptive noise suppression
AM/FM digital tuning
EN55020 compliant
No manual alignment necessary
Programmable reference clock
Volume control
Programmable soft mute control
RDS/RBDS processor
(Si4731/35/37/39)
Optional digital audio output
(Si4731/35/37/39)
2-wire control interface
2.7 to 5.5 V supply voltage
Firmware upgradeable
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
Cellular handsets
Emergency radios
Clock radios
Modules
Mini HiFi
Boom boxes
AM
RDS
SW/LW
WB
Copyright © 2008 by Silicon Laboratories
Si473x-B20
Ordering Information:
See page 18.
Pin Assignments
Si473x-GM
(Top View)
20
19
18
17
NC
1
16
FMI
2
15 DOUT
RFGND
3
GND
14
LOUT
PAD
AMI
4
13
ROUT
RST
5
12
GND
6
11
VDD
7
8
9
10
Patents Pending
Notes:
1. Place Si473x as close as
possible to antenna jack and
keep the FMI and AMI traces as
short as possible.
2. Contact your local sales
representatives for more
information or to obtain
application notes.
Si473x-B20

SI4735-B20-GM Summary of contents

  • Page 1

    ... Portable media players Si473x Product Selector Guide Part FM Si4730 76 – 108 MHz Si4731 76 – 108 MHz Si4734 64 – 108 MHz Si4735 64 – 108 MHz Si4736 76 – 108 MHz Si4737 76 – 108 MHz Si4738 76 – 108 MHz Si4739 76 – 108 MHz Rev. 0.5 10/08 ...

  • Page 2

    Si473x-B20 2 Rev. 0.5 ...

  • Page 3

    T C ABLE O F ONTENTS Section 1. Product Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...

  • Page 4

    Si473x-B20 1. Product Overview The Si473x receivers are the industry's first fully-integrated multiband radio receiver ICs from antenna input to audio output. They require minimal external components with no factory alignment. The Si473x receivers reduce the receiver footprint by >90% ...

  • Page 5

    Table 2. Absolute Maximum Ratings Parameter Supply Voltage Interface Supply Voltage 3 Input Current 3 Input Voltage Operating Temperature Storage Temperature 4 RF Input Level Notes: 1. Permanent device damage may occur if the above Absolute Maximum Ratings are exceeded. ...

  • Page 6

    Si473x-B20 Table 3. DC Characteristics (V = 2 1 Parameter FM Mode Supply Current 1 Supply Current 2 RDS Supply Current WB Mode (Si4736/37/38/39 only) Supply Current 1 Supply ...

  • Page 7

    Table 4. Reset Timing Characteristics (V = 2 1 Parameter RST Pulse Width and GPO1, GPO2/INT Setup to RST GPO1, GPO2/INT Hold from RST Important Notes: 1. When selecting ...

  • Page 8

    Si473x-B20 Table 5. 2-Wire Control Interface Characteristics (V = 2 1 Parameter SCLK Frequency SCLK Low Time SCLK High Time  SCLK Input to SDIO Setup (START)  SCLK ...

  • Page 9

    SU:STA HD:STA LOW 70% SCLK 30% 70% SDIO 30% START t r:IN Figure 2. 2-Wire Control Interface Read and Write Timing Parameters SCLK A6-A0, SDIO R/W START ADDRESS + R/W Figure 3. 2-Wire Control Interface Read and ...

  • Page 10

    Si473x-B20 Table 6. Digital Audio Interface Characteristics (V = 2 1 Parameter DCLK Cycle Time DCLK Pulse Width High DCLK Pulse Width Low DFS Set-up Time to DCLK Rising ...

  • Page 11

    Table 7. FM Receiver Characteristics (V = 2 1 Parameter Input Frequency Sensitivity with Headphone 3,4,5 Network Sensitivity with 50  Network 3,4,5,6 6 RDS Sensitivity 6,7 LNA Input ...

  • Page 12

    Si473x-B20 Table 7. FM Receiver Characteristics (V = 2 1 Parameter 6 Seek/Tune Time 6 Powerup Time 12 RSSI Offset Notes: 1. Additional testing information is available in “AN388: ...

  • Page 13

    Table 8. AM/SW/LW Receiver Characteristics (V = 2 1 – ° Parameter Symbol Input Frequency 2,3,4,5, 6 Sensitivity 5,7 Large Signal Voltage Handling Power Supply Rejection ...

  • Page 14

    Si473x-B20 Table 9. WB Receiver Characteristics (V = 2.7 to 5.5 V, VIO = 1.5 to 3.6V Parameter Input Frequency 2,3 Sensitivity Adjacent Channel Selectivity 2,3,4,5 Audio S/N 6 Audio Frequency Response Low 6 Audio Frequency Response High ...

  • Page 15

    Typical AM/FM Application Schematic FMIP FMI 3 RFGND L1 4 AMI AM antenna 5 C5 RST RST SEN SCLK SDIO RCLK VIO 1.5 to 3.6 V Notes: 1. Place C1 close to V pin ...

  • Page 16

    Si473x-B20 4. Bill of Materials Component(s) C1 Supply bypass capacitor, 22 nF, ±20%, Z5U/X7R C5 Coupling capacitor, 0.47 µF, ±20%, Z5U/X7R L1 Ferrite loop stick, 180 U1 Si473x AM/FM Radio Tuner T1 Transformer, 1–5 turns ratio L2 Air loop antenna, ...

  • Page 17

    Pin Descriptions: Si473x-GM RFGND Pin Number(s) Name connect. Leave floating. 2 FMI FM/WB/SW RF inputs. FMI should be connected to the antenna trace. 3 RFGND RF ground. Connect to ground plane on PCB. 4 AMI ...

  • Page 18

    ... Ordering Guide Part Number* Si4730-B20-GM AM/FM Broadcast Radio Receiver Si4731-B20-GM AM/FM Broadcast Radio Receiver with RDS/RBDS Si4734-B20-GM AM/FM/SW/LW Broadcast Radio Receiver Si4735-B20-GM AM/FM/SW/LW Broadcast Radio Receiver with RDS/RBDS Si4736-B20-GM AM/FM/WB Broadcast Radio Receiver Si4737-B20-GM AM/FM/WB Broadcast Radio Receiver with RDS/RBDS Si4738-B20-GM ...

  • Page 19

    Package Outline: Si473x QFN Figure 5 illustrates the package details for the Si473x. Table 11 lists the values for the dimensions shown in the illustration. Figure 5. 20-Pin Quad Flat No-Lead (QFN) Symbol Millimeters Min Nom A 0.50 0.55 ...

  • Page 20

    Si473x-B20 8. PCB Land Pattern: Si473x QFN Figure 6 illustrates the PCB land pattern details for the Si473x family. Table 12 lists the values for the dimensions shown in the illustration. 20 Figure 6. PCB Land Pattern Rev. 0.5 ...

  • Page 21

    Table 12. PCB Land Pattern Dimensions Symbol Millimeters Min Max D 2.71 REF D2 1.60 1.80 e 0.50 BSC E 2.71 REF E2 1.60 1.80 f 2.53 BSC GD 2.10 — Notes: General 1. All dimensions shown are in millimeters ...

  • Page 22

    Si473x-B20 9. Additional Reference Resources Contact your local sales representatives for more information or to obtain copies of the following references:  EN55020 Compliance Test Certificate  AN332: Si47xx Programming Guide  AN383: Si47xx Antenna, Schematic, Layout, and Design Layout ...

  • Page 23

    N : OTES Si473x-B20 Rev. 0.5 23 ...

  • Page 24

    ... Should Buyer purchase or use Silicon Laboratories products for any such unintended or unauthorized ap- plication, Buyer shall indemnify and hold Silicon Laboratories harmless against all claims and damages. 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. ...