The SR1120 from Spark Micro represents a breakthrough in ultra-low latency wireless audio, designed specifically for applications where real-time feedback is critical. This includes electronic instruments, live streaming, wireless headsets, and robotics. Built around Spark’s proprietary ultra-wideband (UWB) technology, this module delivers audio and data transmission speeds that rival wired connections, without the bulk or cabling.
At the heart of the board is Spark’s SR1120 UWB radio transceiver, capable of high data throughput, very low latency, and exceptional power efficiency. Unlike traditional Bluetooth, which often introduces perceptible lag in time-sensitive use cases, the SR1120 enables seamless audio performance even in challenging environments. Whether you’re syncing multiple speakers or drumming on an electronic kit, latency is reduced to the point of near-instant response.
Key specifications:
- Radio: SR1120 UWB transceiver
- Processor: STM32U5 MCU (STM32U5A5AJH6Q), 32-bit Arm Cortex-M33 @ 160 MHz
- Memory: 4MB Flash, 2.5MB RAM
- Audio Codec: Analog Devices MAX98091 with:
- Stereo Line-In
- Headphone Out
- Microphone Input
- 7-band parametric EQ
- I2S and analog support (8 KHz to 96 KHz sample rates)
- Interfaces:
- USB 2.0 High-Speed with on-chip PHY
- Dual QSPI and multiple SPI ports
- Expansion port for I2S
- Connectivity: Dual-radio operation, remote configuration, RGB/LED status feedback
Evaluation Platform – SPARK EVK with Datacom Application:
The SR1120 EVK platform is built for real-world testing of Spark’s UWB performance. Designed to evaluate low-latency data and audio transmission, the EVK includes a complete datacom application with customisable configurations, real-time diagnostics, and intuitive visual metrics.
Engineers can monitor packet delivery ratios, signal strength, and configure bidirectional/unidirectional data streams. The EVK simplifies long-range, low-latency testing with detailed system telemetry and remote control features, and it supports USB-C power and data, with optional Li-Ion battery operation.
Ideal applications:
- Real-time wireless audio (instruments, headsets)
- Robotics and automation
- IoT sensor networks
- AR/VR systems requiring sync fidelity
- Consumer and industrial audio solutions
SPARK Micro’s SR1120 solution isn’t just about performance—it’s about practicality. With plug-and-play simplicity, open configurability, and robust metrics, it’s an engineer’s toolkit for delivering precise wireless communication.
If you’re evaluating high-speed wireless audio or need a real-time data solution, SPARK Micro’s UWB-based SR1120 platform delivers where Bluetooth falls short.