The QN8075 is a highly integrated, low-power FM transmitter IC designed by Quntic. It is specifically designed for portable audio devices, car audio adapters, and other consumer electronics applications where wireless audio transmission over the FM band is required. The QN8075 integrates all the necessary components for generating a stable and high-quality FM signal from an audio input, including an audio modulator, PLL synthesizer, and output amplifier. Its design focuses on low power consumption, ease of integration, and high audio fidelity.

Applications:

• Portable Media Players
• Mobile Phones
• Car FM Transmitters/Adapters
• Wireless Audio Dongles
• PC Audio Transmitters
• Headphones

Features:

• Stereo Audio Input: Supports stereo audio transmission with high fidelity.
• Low Power Consumption: Maximizes battery life in portable devices.
• Adjustable Output Power: Allows optimization of transmission range and power usage.
• Wide Frequency Range: Covers the full FM broadcast band (76-108 MHz) globally.
• Integrated PLL Synthesizer: Provides stable and accurate frequency generation, reducing external component count.
• Pre-emphasis Function: Improves audio quality by reducing noise and distortion.
• Low Harmonic Distortion: Ensures clean and clear audio transmission with minimal interference.
• I2C Interface: Enables easy and flexible control and configuration.
• Compact Package: Suitable for integration into small, space-constrained devices.

Benefits:

• Wireless Audio Streaming: Provides a convenient way to transmit audio wirelessly to FM radios.
• Extended Battery Life: Low power consumption extends the operating time of portable devices.
• Easy Integration: Simplified design and I2C control facilitate integration into a variety of systems.
• High-Quality Audio: Low distortion and pre-emphasis ensure excellent audio reproduction.
• Flexible Control: Adjustable output power allows for optimizing the transmission range according to the application requirements.

Additional Details:

The QN8075 typically operates with a supply voltage in the range of 2.7V to 3.6V. The audio input is compatible with standard line-level audio signals. The I2C interface facilitates programming the transmission frequency, output power, and other settings. It generally requires a minimal set of external components, mainly decoupling capacitors and antenna matching networks. The device is commonly available in small SMD packages such as QFN or TSSOP to allow for compact designs.