SSM2166S

SSM2166S is a dual microphone preamplifier IC with integrated dynamic range control (soft limiting/compression) per channel. It provides two low-noise preamps plus envelope detectors and an AGC/limiter to stabilize mic levels in portable audio gear. Each channel has adjustable gain via external components and a compressor with defined threshold, attack, and release behavior. Designed for low power, often single-supply operation, it requires only a small number of external parts. Typical applications include headsets, VoIP phones, conferencing gear, and portable recorders using electret or MEMS mics. In use, feed the mics into the inputs, configure gain and dynamic response with external networks, and route the outputs to ADCs or line stages. The S variant indicates a specific package/implementation. For exact pinout, supply voltage range, gains, and timing constants, consult the official datasheet.

- Pin count: 8 pins (8-pin package, e.g., SOP-8/MSOP-8)
- Function: A single‑channel microphone preamplifier with built‑in automatic gain control (AGC) / compression for dynamic-range control in audio applications.

- Manufacturer: Analog Devices, Inc. (ADI)
- What kind of company: A multinational American semiconductor company that designs and manufactures analog, mixed-signal, and DSP integrated circuits.

- Microphone preamplifier with built‑in compression/limiting (dynamic range control)
- Voice/telecom and conferencing gear (phones, VoIP, video conferencing)
- Portable recorders and cameras needing automatic gain control and peak limiting
- Broadcast and studio equipment for peak limiting and loudness management
- Sensor/field microphone conditioning to protect downstream ADCs in harsh environments
- Any compact audio chain requiring low-noise gain plus envelope-detected dynamics.

SSM2166S comes in an 8-pin surface-mount package: SOIC-8 (8-pin small-outline package).