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PDF ( 数据手册 , 数据表 ) Si4738-B20

零件编号 Si4738-B20
描述 BROADCAST WEATHER BAND RADIO RECEIVER
制造商 Silicon Laboratories
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Si4738-B20 数据手册, 描述, 功能
Si4736/37/38/39-B20
BROADCAST WEATHER BAND RADIO RECEIVER
Features
NOAA weather band support (162.4– No manual alignment necessary
162.55 MHz)
Programmable reference clock
Worldwide FM band support
Volume control
(76–108 MHz)
Programmable soft mute control
Worldwide AM band support
Programmable de-emphasis
(520–1710 kHz) (Si4736/37 only)
RDS/RBDS processor (Si4737/39
1050 Hz alert tone detection
only)
Excellent real-world performance
Optional digital audio output (Si47/39
Freq synthesizer with integrated VCO only)
Advanced AM/FM seek tuning
Optional digital audio output
Automatic frequency control (AFC)
(Si4737/39 only)
Automatic gain control (AGC)
2-wire and 3-wire control interface
Integrated LDO regulator
2.7 to 5.5 V supply voltage
Digital FM stereo decoder
Firmware upgradeable
Adaptive noise suppression
3 x 3 x 0.55 mm 20-pin QFN package
AM/FM/WB digital tuning
Pb-free/RoHS compliant
Ordering Information:
See page 30.
Pin Assignments
Si4736/37/38/39-GM
(Top View)
Applications
Emergency radios
Table and portable radios
Stereos
Mini/micro systems
Portable media players
Boom boxes
Cellular handsets
Modules
Clock radios
Mini HiFi
Description
The Si4736/37/38/39 is the first digital CMOS AM/FM/WB radio receiver IC that
integrates the complete tuner function from antenna input to audio output.
NC 1
FMI 2
RFGND 3
AMI 4
RST 5
6
20 19 18 17 16
15 DOUT
GND
PAD
14 LOUT
13 ROUT
12 GND
7 8 9 10 11 VDD
Functional Block Diagram
AMI
AM
ANT RFGND
FM/
WB
ANT FMI
2.7– 5.5 V
VDD
GND
LNA
AGC
LNA
AGC
LDO
Si473x
RDS
(Si4737/
39)
LOW-IF
DIGITAL
AUDIO
(Si4737/
39)
DOUT
DFS
GPO/DCLK
ADC DAC
DSP
ADC DAC
ROUT
LOUT
AFC
CONTROL
INTERFACE
VIO
1.5–3.6 V
Patents pending
Notes:
1. To ensure proper operation and
receiver performance, follow the
guidelines in “AN383: Universal
Antenna Selection and Layout
Guidelines.” Silicon Laboratories will
evaluate schematics and layouts for
qualified customers.
2. Place Si4736/37/38/39 as close as
possible to antenna jack and keep
the FMI and AMI traces as short as
possible.
Rev. 1.0 4/08
Copyright © 2008 by Silicon Laboratories
Si4736/37/38/39-B20







Si4738-B20 pdf, 数据表
Si4736/37/38/39-B20
tSU:STA tHD:STA
tLOW
tHIGH
SCLK 70%
30%
tr:IN tf:IN
tSP
tSU:STO
tBUF
SDIO 70%
30%
START
tr:IN
tHD:DAT tSU:DAT
tf:IN,
tf:OUT
STOP
Figure 2. 2-Wire Control Interface Read and Write Timing Parameters
START
SCLK
SDIO
A6-A0,
R/W
D7-D0
D7-D0
START ADDRESS + R/W
ACK
DATA
ACK
DATA
ACK
Figure 3. 2-Wire Control Interface Read and Write Timing Diagram
STOP
8 Rev. 1.0







Si4738-B20 equivalent, schematic
Si4736/37/38/39-B20
2. Typical Application Schematic
FMIP
L1
AM antenna C5
Si4736/37 only
1 NC
2 FMI
3 RFGND
4 AMI
5 RST
GPO1
GPO2/INT
R1 GPO3/DCLK
R2 DFS
U1
Si473x
DOUT 15 R3
DOUT
Optional: Digital Audio Output
LOUT/DFS 14
ROUT/DOUT 13
GND 12
VDD 11
LOUT
ROUT
C1
VBATTERY
2.7 to 5.5 V
RST
SEN
SCLK
SDIO
RCLK
VIO
1.5 to 3.6 V
GPO3
X1 RCLK
C2 C3
Optional: for crystal oscillator option
L2 RFGND
AMI
T1
C5
Optional: AM air loop antenna
Notes:
1. Place C1 close to VDD pin.
2. All grounds connect directly to GND plane on PCB.
3. Pins 1 and 20 are no connects, leave floating.
4. To ensure proper operation and receiver performance, follow the guidelines in “AN383: Universal Antenna Selection and
Layout Guidelines.” Silicon Laboratories will evaluate schematics and layouts for qualified customers.
5. Pin 2 connects to the FM antenna interface, and pin 4 connects to the AM antenna interface.
6. RFGND should be locally isolated from GND.
7. Place Si4736/37/38/39 as close as possible to antenna jack and keep the FMI and AMI traces as short as possible.
16 Rev. 1.0










页数 30 页
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