The SI4711-A20-GMR is a broadcast FM radio transmitter from Silicon Labs, designed for portable audio devices and other applications requiring FM transmission capabilities. It is a highly integrated single-chip solution that simplifies the design and reduces the bill of materials for FM transmitters.

Applications:

• Portable Media Players (PMPs)
• Mobile Phones
• PC Peripherals
• Automotive Aftermarket Products
• Wireless Speakers
• FM Transmitters for iPods and other MP3 Players

Features:

• Single-chip FM transmitter solution
• Frequency range: 76-108 MHz
• Integrated VCO and synthesizer
• Low power consumption
• Modulation scheme: Direct FM
• Digital audio interface
• Programmable pre-emphasis
• RDS/RBDS encoder
• I2C control interface
• Small form factor package

Benefits:

• Simplified FM transmitter design
• Reduced BOM cost
• Low power consumption extends battery life in portable applications
• High-quality audio transmission
• RDS/RBDS support for enhanced user experience
• Easy integration with existing audio systems
• Compact size for space-constrained applications

Additional Details:

The SI4711-A20-GMR supports various audio input formats, including digital audio via I2S. It features a fully integrated frequency synthesizer, which allows for precise tuning across the FM band. The device also includes a programmable pre-emphasis filter to optimize audio performance. RDS/RBDS encoding is integrated to transmit station identification, program information, and other data. The I2C interface allows for easy configuration and control of the device. The typical supply voltage is 3.3V. The SI4711-A20-GMR is available in a small surface-mount package, making it suitable for high-density designs. It meets the regulatory requirements for FM transmitters in most regions. The device's performance is characterized by low harmonic distortion and high signal-to-noise ratio.