PDF Si4736-B20 Data sheet ( Hoja de datos )

Número de pieza	Si4736-B20
Descripción	BROADCAST WEATHER BAND RADIO RECEIVER
Fabricantes	Silicon Laboratories
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No Preview Available ! 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 1 page Si4736/37/38/39-B20 Table 3. DC Characteristics (VDD = 2.7 to 5.5 V, VIO = 1.5 to 3.6 V, TA = –20 to 85 °C) Parameter Symbol Test Condition Min Typ Max FM Mode Supply Current Supply Current1 RDS Supply Current2 Supply Current2 WB Mode Supply Current Supply Current Supply Current IFM IFM IFM IFMD Low SNR level Digital Output Mode IFM IFM IFMD Low SNR level — — — — — — — 19.2 19.8 19.9 18.0 19.2 19.8 17.2 22 23 23 20.5 22 23 20.5 AM Mode Supply Current Supply Current2 IAM IAMD Analog Output Mode Digital Output Mode — — 17.3 20.5 15.5 20.5 Supplies and Interface Interface Supply Current VDD Powerdown Current VIO Powerdown Current High Level Input Voltage3 Low Level Input Voltage3 High Level Input Current3 Low Level Input Current3 High Level Output Voltage4 Low Level Output Voltage4 IIO — 320 600 IDDPD — 10 20 IIOPD SCLK, RCLK inactive — 1 10 VIH 0.7 x VIO — VIO + 0.3 VIL –0.3 — 0.3 x VIO IIH VIN = VIO = 3.6 V –10 — 10 IIL VIN = 0 V, –10 — 10 VIO = 3.6 V VOH IOUT = 500 µA 0.8 x VIO — — VOL IOUT = –500 µA — — 0.2 x VIO Notes: 1. LNA is automatically switched to higher current mode for optimum sensitivity in weak signal conditions. 2. Specifications are guaranteed by characterization. 3. For input pins SCLK, SEN, SDIO, RST, RCLK, DCLK, and DFS. 4. For output pins SDIO, DOUT, GPO1, GPO2, and GPO3. Unit mA mA mA mA mA mA mA mA mA µA µA µA V V µA µA V V Rev. 1.0 5 5 Page Si4736/37/38/39-B20 Table 8. Digital Audio Interface Characteristics (VDD = 2.7 to 5.5 V, VIO = 1.5 to 3.6 V, TA = –20 to 85 °C) Parameter DCLK Cycle Time DCLK Pulse Width High DCLK Pulse Width Low DFS Set-up Time to DCLK Rising Edge DFS Hold Time from DCLK Rising Edge DOUT Propagation Delay from DCLK Falling Edge Symbol Test Condition tDCT tDCH tDCL tSU:DFS tHD:DFS tPD:DOUT Min 26 10 10 5 5 0 Typ Max Unit — 1000 ns — — ns — — ns — — ns — — ns — 12 ns DCLK DFS DOUT tDCH tDCL tDCT tHD:DFS tSU:DFS tPD:OUT Figure 8. Digital Audio Interface Timing Parameters, I2S Mode Rev. 1.0 11 11 Page

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