STTS22H

The STTS22H is a digital MEMS microphone from STMicroelectronics, designed for high-performance audio capture in compact form factors. It features a wide frequency response of 100 Hz to 20 kHz, ensuring accurate reproduction of voice and environmental sounds. The device delivers a signal-to-noise ratio (SNR) of up to 67 dB, enabling clear audio acquisition even in noisy environments. With a maximum sound pressure level (SPL) of 125 dB, it supports robust operation in high-acoustic-load scenarios without distortion. This microphone integrates a built-in analog-to-digital converter (ADC), providing a direct digital output via I²S or PDM interface, simplifying system integration and reducing the need for external signal conditioning components. Its low power consumption—typically 350 µA in active mode—makes it ideal for battery-powered applications such as wearables, smartphones, and IoT devices. The STTS22H also includes an internal bias circuit, eliminating the need for external biasing resistors, further minimizing board space and cost. The device is packaged in a 2.8 mm × 2.4 mm × 1.0 mm wafer-level package (WLP), offering excellent mechanical robustness and suitability for surface-mount assembly processes. It operates over a supply voltage range of 1.7 V to 3.6 V, making it compatible with a wide range of power domains in modern electronics. The STTS22H meets industrial standards for reliability and performance, including ESD protection up to ±8 kV HBM and full compliance with RoHS and REACH regulations. Applications include voice-enabled smart home devices, hands-free communication systems, hearing aids, automotive voice control interfaces, and portable audio recorders. Its small footprint and low power characteristics make it particularly well-suited for wearable technology like smartwatches, earbuds, and fitness trackers where space and energy efficiency are critical. Additionally, its consistent sensitivity across temperature variations ensures reliable performance in diverse operating conditions—from cold outdoor environments to warm indoor settings. The STTS22H is part of STMicroelectronics’ broader portfolio of advanced MEMS microphones, emphasizing quality, miniaturization, and system-level integration. It supports rapid prototyping and production through easy compatibility with existing development tools and reference designs provided by ST. This makes it a preferred choice for engineers seeking dependable, scalable solutions in consumer, industrial, and automotive markets.