Si4830 Broadcast Mechanical Tuning AM/FM Radio Receiver Description The Si4830 is the first wheel-tuned digital CMOS AM/FM radio receiver IC that integrates the complete receiver function from antenna input to audio output. Leveraging Silicon Laboratories' proven and patented digital low intermediate frequency (low-IF) receiver architecture, the Si4830 delivers superior RF performance and interference rejection in both AM and FM bands. Additionally, the digital core provides advanced audio conditioning for all environments, removing pops, clicks, and loud static in variable signal conditions. The superior control algorithm integrated in Si4830 provides easy and reliable control interface while eliminating all the manual tuned external components used in traditional solutions. Like other successful audio products from Silicon Labs, Si4830 offers unmatched integration and PCB space savings with minimum external components and less than 20 mm2 of board area, excluding the antenna inputs. The high integration and complete system production test simplifies design-in, increases system quality, and improves manufacturability. The receiver has very low power consumption, runs off two AAA batteries, and delivers the performance benefits of digital tuning to the legacy analog radio market. Features - Worldwide FM band support (64–108 MHz) - Worldwide AM band support (520–1710 kHz) - Selectable support for all AM/FM regional bands - Wheel-tuned / Mechanical-tuned frequency support - Mechanical volume control + off/on - Excellent real-world performance - Digital radio with leading low-IF architecture - Automatic frequency control (AFC) - Stereo/mono + tuning and stereo indicator - EN55020 compliant - Minimal BOM components w/ no manual alignment - No external MCU required - Two AAA batteries with 2.0 to 3.6 V supply voltage (T = 25° C) - Wide range of ferrite loop sticks and air loop antennas - 24-pin SSOP package - RoHS compliant Applications - Table and portable radios - Stereos - Mini/micro systems - Boomboxes - Clock radios - Modules - Entertainment systems - Toys, lamps, and any application needing an AM/FM radio Si4830 ADC AMI AM ANT RFGND LNA FMI LOUT DAC ROUT DSP ADC FM ANT DAC AGC 0/90 TUNE1/2 2.0~3.6V CONTROL INTERFACE AFC VDD AM/FM Receiver STEREO STATION XTAL OSC BAND REG XTALO Copyright © 2010 by Silicon Laboratories RST XTALI 2.24.2010 Si4830 Broadcast Mechanical Tuning AM/FM Radio Receiver Selected FM Electrical Specifications Parameter Symbol Input Frequency Conditions fRF Sensitivity (S+N)/N = 26 dB Input IP3 Min Typ Max Units 64 — 108 MHz — 2.2 — µV EMF — 105 — dBµV EMF Adjacent Channel Selectivity ±200 kHz — 50 — dB Alternate Channel Selectivity ±400 kHz — 65 — dB Audio Output Voltage — 80 — mVRMS Audio S/N — 53 — dB Audio THD — 0.1 0.5 % Min Typ Max Units 520 — 1710 kHz — 25 — µV EMF Audio S/N — 56 — dB Audio Output Voltage — 60 — mVRMS Audio THD — 0.1 — % 180 — 450 μH Selected AM Electrical Specifications Parameter Symbol Input Frequency Conditions fRF Sensitivity (S+N)/N = 26 dB Antenna Inductance Package Information Pin Assignments Table 1. Package Dimensions Dimension Min Nom Max Dimension Min Nom Max A — — 1.75 L 0.40 — 1.27 A1 0.10 — 0.25 L2 b 0.20 — 0.30 θ c 0.10 — 0.25 D 8.65 BSC 0.25 BSC 0° — aaa 0.20 bbb 0.18 E 6.00 BSC ccc 0.10 E1 3.90 BSC ddd 0.10 e 0.635 BSC Notes: 1. 2. 3. 4. 8° Stereo 1 24 LOUT BAND 2 23 ROUT XTALO 3 22 DBYP TUNE2 4 21 VDD2 TUNE1 5 20 VDD1 NC 6 19 XTALI NC 7 18 Station FMI 8 17 RSV2 RFGND 9 16 RSV1 NC 10 15 RST NC 11 14 GND AMI 12 13 GND All dimensions shown are in millimeters (mm) unless otherwise noted. Dimensioning and Tolerancing per ANSI Y14.5M-1994. This drawing conforms to the JEDEC Solid State Outline MO-137, Variation AE. Recommended card reflow profile is per the JEDEC/IPC J-STD-020 specification for Small Body Components. AM/FM Receiver Copyright © 2010 by Silicon Laboratories 2.24.2010 Silicon Laboratories and Silicon Labs are trademarks of Silicon Laboratories Inc. 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