Si4820/24-A10 BROADCAST MECHANICAL TUNING AM/FM/SW RADIO RECEIVER Features Worldwide FM band support Automatic frequency control (AFC) (64109 MHz) Integrated LDO regulator Worldwide AM band support 2.0 to 3.6 V supply voltage (5041750 kHz) Wide range of ferrite loop sticks and SW band support (Si4824 only) air loop antennas supported (5.622 MHz) 24-pin SSOP No manual alignment necessary RoHS-compliant Mono audio output Direct volume control Selectable support AM/FM/SW Not EN55020 compliant* Ordering Information: regional bands *Note: For consumer applications that See page 14. require EN 55020 compliance, use Si4831/35-B. Applications Pin Assignments Table and portable radios Modules Mini/micro systems Clock radios Si4820/24-A10 (SSOP) CD/DVD players Mini HiFi Boom boxes Entertainment systems 1 24 AOUT LNA EN 2 23 NC NC Description 3 22 DBYP TUNE1 The Si4820/24-A10 is the entry level mechanical-tuned digital CMOS AM/FM/SW 4 21 VDD2 TUNE2 radio receiver IC that integrates the complete receiver function from antenna input 5 20 VDD1 BAND to audio output. The Si4820/24-A10 extends Silicon Laboratories multi-band tuner 6 19 XTALI NC family, and further increases the ease and attractiveness of design radio reception 7 18 XTALO NC to audio devices through small size and board area, minimum component count, 8 17 FMI VOL- and superior, proven performance. The Si4820/24-A10 is drop-in replaceable to 9 16 RFGND VOL+ the existing Si4831/35 tuner, requires a simple application circuit, and removes 10 15 NC RST any requirements for manually tuning components during the manufacturing 11 14 GND NC process. It is a very simple product to design, manufacture, and support across 12 13 GND multiple product lines. The receiver has very low power consumption, runs off two AMI AAA batteries, and delivers the performance benefits of digital tuning to the analog radio market. This product, its features, and/or its Functional Block Diagram architecture is covered by one or more of the following patents, as well as other Si4820/24 Si4830/34 patents, pending and issued, both ADC AMI foreign and domestic: 7,127,217 AM LNA DSP DAC AOUT 7,272,373 7,272,375 7,321,324 RFGND ANT 7,355,476 7,426,376 7,471,940 ADC FM 7,339,503 7,339,504. AGC ANT FMI 0/90 TUNE1/2 ADC AFC CONTROL INTERFACE XTALI BAND 2.0~3.6V VDD1/2 XTAL REG OSC Rev. 1.0 11/11 Copyright 2011 by Silicon Laboratories Si4820/24-A10 LNA EN RSTSi4820/24-A10 2 Rev. 1.0