AM FM Radio Module | Broadcast Receiver & RDS – Coral RF
An AM FM radio module is a compact receiver‑only component that demodulates broadcast signals into audio. Coral RF provides modules based on Silicon Labs’ Si48xx (cost‑optimised, mechanical tuning) and Si47xx (advanced, RDS/stereo) families – ideal for tabletop radios, boomboxes, clock radios, and portable audio.
| Band | Frequency | Audio Quality | Noise Immunity |
|---|---|---|---|
| AM (Amplitude Modulation) | 504–1750 kHz | Moderate | Poor |
| FM (Frequency Modulation) | 64–109 MHz | Excellent (stereo) | Good |
RDS/RBDS (Radio Data System) provides station name, song title, traffic info – available on Si47xx.
| Model | Output | Frequency | Features |
|---|---|---|---|
| Si4825 | Mono | AM/FM/SW | Lowest BOM, mechanical tuning, global bands |
| Si4827 | Mono | AM/FM/SW | Adds digital display interface |
| Si4836 | Stereo | AM/FM/SW | Commercial grade, stereo output |
16‑pin SOIC, 2.0–3.6 V, ~20 mA
Reduces BOM by >80% vs. discrete designs
No manual alignment required
Built‑in RDS/RBDS decoder (station name, song title, traffic)
Multi‑band: AM/FM/SW/LW/WB
I²C control, stereo audio
Suitable for automotive, professional monitoring, high‑end consumer
| Feature | Broadcast Receiver (Si48xx/Si47xx) | Coral RF ISM Module (CC1101, CC1310) |
|---|---|---|
| Function | One‑way receive (audio) | Two‑way data transmit/receive |
| Frequency | AM/FM/SW/LW | 433/868/915 MHz, 2.4 GHz |
| Output | Analog audio | Digital data (SPI/UART) |
| Applications | Radios, boomboxes | IoT, telemetry, remote control |
Tabletop / portable radios (Si4825 – lowest cost)
Stereo boomboxes (Si4836)
Clock radios (Si4825/27)
Emergency / weather radios (Si47xx with WB)
Automotive infotainment (Si47xx with RDS)
Professional broadcast monitoring (Si47xx)
Silicon Labs evaluation boards (~$50)
Coral RF design‑in: schematic review, layout guidance, custom module development
Hybrid designs: combine broadcast receiver with Coral RF ISM module (e.g., Si4825 + CC1101 for remote control)
| Application | Recommended | Reason |
|---|---|---|
| Low‑cost mono radio | Si4825 | Lowest BOM, mechanical tuning |
| Mono radio with digital display | Si4827 | Adds display interface |
| Stereo portable radio | Si4836 | Stereo output, commercial grade |
| RDS radio (station/song display) | Si47xx series | Built‑in RDS decoder, I²C |
| Emergency radio (AM/FM/WB) | Si47xx (WB‑capable) | Weather band support |
| Hybrid (broadcast + data) | Si48xx + Coral RF ISM | Dual‑module integration |
Coral RF’s AM FM radio modules – based on Silicon Labs Si48xx and Si47xx – provide a complete, cost‑effective broadcast receiver solution for consumer, industrial, and automotive products. Whether you need a simple mechanical‑tuned mono radio (Si4825) or an advanced RDS‑enabled stereo receiver (Si47xx), Coral RF offers the module, documentation, and support to accelerate your design.
For applications that also require wireless data (IoT, telemetry, remote control), Coral RF’s broader portfolio of Sub‑1GHz and 2.4 GHz ISM modules (CC1101, CC1310, SX1262) can be seamlessly integrated alongside the broadcast receiver – all from a single trusted supplier.
This shortened article retains all key technical and product information. Contact Coral RF for datasheets, reference designs, and volume pricing.