In a noteworthy development, German company Asahi Kasei Microdevices Corporation (AKM), a subsidiary of the Asahi Kasei Group, has unveiled the AK5707, a compact analog-to-digital converter (ADC) with integrated glass-break detection, specifically designed to improve the efficiency of IoT security applications.
The AK5707 distinguishes itself through its features, including low power consumption, a compact design, and advanced sound differentiation capabilities. With a minimal power requirement of 34µA, the AK5707’s Acoustic Activity Analyzer (AAA) actively monitors acoustic events based on user-customizable profiles. Upon detection, it triggers the ADC, initiating recording to the integrated audio buffer and generating an interrupt to wake the external System-on-Chip (SoC).
A key advantage of the AK5707 lies in its ability to retrospectively analyze audio activity recorded during standby or boot-up phases. This approach allows the system to remain in a low-power state until a detection event occurs, significantly reducing standby power consumption and extending the battery life of the end product.
The flexibility of the AK5707’s acoustic parameter settings ensures adaptability to various sounds and patterns, making it well-suited for diverse security applications. The AAA block, consuming a mere 34µA during audio event monitoring, surpasses conventional loudness-based detection systems. Its continuous adjustment of detection parameters in response to the current noise floor minimizes false positives, enhancing battery life in noisy environments.
The AK5707’s ADC block features a 16-bit resolution, achieving a Signal-to-Noise Ratio (SNR) of 95 dB with a power consumption of only 200 µA. This efficiency makes the AK5707 an ideal choice for always-on battery-powered systems, addressing the increasing demand for sustainable IoT devices.
Further enhancing its practicality, the AK5707 is packaged in a space-saving 1.53×1.58 mm Chip Scale Package (CSP). The integration of the ADC block’s AC coupling capacitors into the device reduces the reliance on external components. In a single-rail configuration, the AK5707’s complete layout can be implemented in under 3.2 mm² of PCB area, offering valuable savings in design and manufacturing.
Currently in the sampling phase, the AK5707 is set to enter mass production in September 2024, marking a significant advancement in the field of smart security sensors and IoT applications.
