The SI4713-A20-GMR is an FM radio transmitter from Silicon Labs. It is a fully integrated, single-chip solution designed to broadcast audio over the FM band. Its main applications are in portable devices and accessories where a compact, low-power, and high-performance FM transmitter is required.

Applications:

• Portable Media Players (PMPs)
• Mobile Phones
• Tablet Computers
• Car Audio Adapters
• Personal Navigation Devices (PNDs)
• FM Transmitters for iPods and other MP3 Players

Features:

• Single-chip FM transmitter
• Frequency range: 76-108 MHz (worldwide FM band)
• Integrated VCO and synthesizer
• Low power consumption
• Direct FM modulation
• Digital audio interface (I2S)
• RDS/RBDS encoder support
• Programmable pre-emphasis
• I2C control interface
• Small form factor package

Benefits:

• Simplified design, reducing external component count
• Lower bill of materials (BOM) cost
• Extended battery life due to low power consumption
• High-quality audio transmission
• RDS/RBDS support for enhanced user experience (station identification, program information)
• Easy integration with various audio platforms
• Compact size makes it suitable for space-constrained designs

Additional Details:

The SI4713-A20-GMR offers digital audio input via I2S and features an integrated frequency synthesizer for precise tuning across the FM band. A programmable pre-emphasis filter allows for audio optimization based on regional standards. The integrated RDS/RBDS encoder enables the transmission of station name, program information, and other data to compatible receivers. Configuration and control are performed using the I2C interface. The device typically operates at 3.3V and is available in a small surface-mount package, making it suitable for high-density PCB layouts. The device is designed to meet FM broadcasting regulations concerning harmonic distortion and spurious emissions. Its small size, low power consumption, and feature set make it an excellent choice for adding FM transmission capabilities to portable audio devices.