This document mainly introduces the function characteristics of SSM2166, including single 5V voltage supply, adjustable noise gate threshold, compression ratio setting, automatic limiting function, adjustable release time, low noise and distortion, power-down function, 20kHz bandwidth, etc
The SSM2166 is a complete microphone preamplifier with variable compression and noise‑gating, designed for computer audio, communication, and public‑address systems. It operates from a single 5 V supply, provides up to 60 dB VCA gain, and includes a power‑down mode that reduces supply current to less than 100 µA.
The document provides functional block diagrams, pin descriptions, absolute maximum ratings, typical performance curves, and guidelines for PCB layout and evaluation board setup. It also lists specifications such as supply voltage range, input/output impedance, compression ratio range, and noise‑gate threshold.
| Supply Voltage Range | 4.5 V – 5.5 V |
|---|---|
| Supply Current (ISY) | 7.5 mA – 10 mA |
| Input Impedance (ZIN) | 180 kΩ |
| Output Impedance (ZOUT) | 75 Ω |
| Compression Ratio Range | 1:1 – 15:1 |
| Noise Gate Threshold | ≈0.7 mV |
| Operating Temperature Range | -40 °C – +85 °C |
The device operates from a 5 V supply with a permissible range of 4.5 V to 5.5 V.
The SSM2166 can operate up to +85 °C.
The input impedance is specified as 180 kΩ.