Overview

Ultra-Low Latency Wireless Audio Transmitter SoC

The BK9535 is a professional-grade, single-chip wireless audio transmitter designed for applications where pristine audio quality, ultra-low latency, and robust performance are non-negotiable. It sets a new standard for digital wireless audio transmission in demanding environments such as professional sound systems, live performances, and critical communication setups.

Unlike traditional analog solutions, the BK9535 utilizes advanced pi/4 DQPSK digital modulation and a high-fidelity audio path to deliver crystal-clear, uncompromised sound. It features a high-performance audio ADC and an ultra-low-latency codec, achieving an end-to-end delay of less than 3ms—virtually imperceptible and essential for live monitoring, singing, and synchronized performances. With an audio dynamic range of 96 dB and a broad frequency response (30Hz – 20kHz), it captures the full nuance and power of the original audio source.

Engineered for simplicity and reliability, the BK9535’s highly integrated design incorporates RF, baseband, and audio processing into a single compact chip (QFN 5×5). This architecture eliminates external compander circuits, which dramatically reduces PCB footprint, increases manufacturing reliability, and lowers overall system cost. It operates across a wide spectrum—VHF (160-270MHz), UHF (450-980MHz), and 1GHz (980-1176MHz) bands—offering flexibility for global deployments.

For system integration, the BK9535 is the perfect transmitter companion to Beken’s receiver chips, the BK9532 or BK9522, enabling you to build a complete, high-performance wireless audio system with ease.

Key Features & Technical Specifications

• Unmatched Audio Quality: 96 dB dynamic range, 20Hz-20kHz frequency response, and digital transmission ensure studio-grade audio fidelity free from noise and interference.

• Ultra-Low Latency: <3ms system delay from microphone input to receiver output, critical for live performance and real-time monitoring.

• Highly Integrated Design: Single-chip solution (RF-to-baseband) reduces external component count, saving space, cost, and improving reliability.

• Wide Frequency Flexibility: Supports VHF, UHF, and 1GHz bands, allowing for channel selection to avoid congestion.

• Intelligent Audio Management: Programmable microphone gain (0-47.5dB in 0.5dB steps), integrated Audio AGC, and limiting for consistent audio levels.

• Robust & Secure Link: Features automatic squelch, diversity support, and a secure 32-bit encrypted user data channel with CRC check for reliable control data transmission.

• Flexible Digital Interface: Supports external PCM or I2S digital audio input (mono) with selectable sampling rates (48/32/24/12 kHz).

• Compact & Efficient: 5x5mm QFN-32 package; operates from a single 2.8V-3.6V supply with a typical transmit power of 10 dBm in the UHF band.

Ideal Applications

• Professional Wireless Microphone Systems

• In-Ear Monitor (IEM) Transmitters

• Tour-Guide and Conference Systems

• Wireless Intercoms

• High-Quality AV Transmission for Education and Worship

• Wireless Audio for Broadcast and Film

For documentation and help, refer to our Knowledge Base section

Beken is the official brand name of Bekencorp.