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SI4720-B20 Folha de dados(PDF) 1 Page - Silicon Laboratories |
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SI4720-B20 Folha de dados(HTML) 1 Page - Silicon Laboratories |
1 / 48 page Rev. 1.0 2/08 Copyright © 2008 by Silicon Laboratories Si4720/21-B20 . Si4720/21-B20 B ROADCAST FM R ADIO TRANSCEIVER FOR P ORTABLE A PPLICATIONS Features Applications Description The Si4720/21 integrates the complete tuner and transmit functions for FM broadcast reception and standards-compliant, unlicensed FM broadcast stereo transmission. Users must comply with local radio frequency (RF) transmission regulations. Functional Block Diagram Full FM RX and TX in 3 x 3 QFN Worldwide FM RX band support Compliant with worldwide FM TX regulations Excellent real-world performance Supports integrated TX/RX antenna Programmable transmit output voltage Frequency synthesizer with integrated VCO Integrated LDO regulator Minimal BOM (15 mm2) Digital audio output (Si4721 only) Digital audio input Adjustable seek parameters Adjustable mono/stereo blend Adjustable soft mute Advanced modulation control Audio dynamic range control Audio silence detector Programmable reference clock input 2-wire and 3-wire control interface 2.7 to 5.5 V supply voltage 3 x 3 x 0.55 mm 20-pin Pb-free QFN package RDS/RDBS encoder/decoder (Si4721 only) Cellular handsets/hands-free MP3 players Portable media players Wireless speakers/microphone Satellite digital audio radios Personal computers/notebooks ADC ADC Si4720/21 DSP DAC DAC PGA AFC FMI AGC Tx/Rx Ant Rx Ant* TXO RFGND CONTROL INTERFACE GPO LIN/DFS RIN/DOUT ROUT/DIN LOUT/DFS LDO VDD GND 2.7–5.5 V C1 22 uF L1 120 nH LNA *Note: Dedicated Rx antenna is optional Patents pending Notes: 1. To ensure proper operation and FM transceiver performance, follow the guidelines in “AN383: 3 mm x 3 mm QFN Universal Layout Guide.” Silicon Laboratories will evaluate schematics and layouts for qualified customers. 2. Place the Si4720/21 as close as possible to the antenna jack, and keep the FMI trace as short as possible. Ordering Information: See page 42. Pin Assignments GND PAD 1 2 3 17 18 19 20 11 12 13 14 6 7 8 9 4 5 16 10 15 RIN/DOUT LOUT/DFS ROUT/DIN GND RST NC TXO VDD FMI RFGND Si4720/21 (Top View) |
Nº de peça semelhante - SI4720-B20 |
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Descrição semelhante - SI4720-B20 |
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