QN8027 FM transmitter chip MSOP10

Description

QN8027 FM transmitter chip MSOP10

The QN8027 is a low-power, monolithic FM transmitter IC designed for portable audio broadcasting applications. It operates in the 76 MHz to 108 MHz FM band and is commonly used in wireless audio transmitters, MP3 player adapters, and personal FM broadcasting. Below are its key specifications:

Key Specifications of QN8027 (MSOP-10 Package):

1. General Parameters:

• Frequency Range: 76 MHz – 108 MHz (adjustable in 50 kHz steps)

• Modulation: Stereo/Mono FM (supports RDS/RBDS)

• Supply Voltage (VDD): 2.7V – 5.5V (single supply)

• Operating Current: 10 mA (typical at 3.3V)

• Package: MSOP-10 (Mini Small Outline Package)

2. RF Performance:

• Output Power: Adjustable up to ~0 dBm (1 mW)

• Frequency Deviation: ±75 kHz (max, adjustable)

• Harmonic Emission: <-40 dBc (low spurious emissions)

• Frequency Stability: ±2.5 ppm (with crystal oscillator)

3. Audio Features:

• Audio Input: Supports analog line-in (mono/stereo) & digital I2S input

• Pre-emphasis: 50 µs / 75 µs (selectable)

• SNR (Signal-to-Noise Ratio): >60 dB

• THD (Total Harmonic Distortion): <0.3%

4. Digital Control & Interface:

• Control Interface: I²C (up to 400 kHz)

• Programmable Settings:

  • Frequency tuning

  • TX power adjustment

  • Stereo/mono mode

  • RDS (Radio Data System) support

5. Applications:

• Wireless audio transmitters

• FM modulators for MP3 players & smartphones

• Personal FM broadcasting (e.g., car audio adapters)

• Low-power IoT audio streaming

Pin Configuration (MSOP-10):

Typical Application Circuit:

The QN8027 requires:

• A 12 MHz crystal oscillator (for stable frequency generation)

• A simple wire antenna (or 50Ω matching network for better range)

• I²C microcontroller (for frequency/power control)