This product is SSM2166 microphone preamplifier with variable compression and noise gating function. Main features include: single 14-lead package, single 5V power supply, adjustable noise gate threshold, adjustable compression ratio, automatic limiting function, low noise and distortion, low cost, 20kHz bandwidth, etc.
The SSM2166 is a complete microphone conditioner designed for computer audio systems, public address systems, and communication headsets. It integrates a low-noise voltage-controlled amplifier (VCA) that provides dynamic gain adjustment to maintain compression characteristics based on an external resistor setting.
Key features include adjustable noise gate thresholds, automatic limiting to prevent ADC overload, and a power-down feature. The device operates from a single +5 V supply and is available in 14-lead SOIC and P-DIP packages with guaranteed operation over the extended industrial temperature range of -40°C to +85°C.
| Supply Voltage Range | +4.5 to +5.5 V |
|---|---|
| Operating Temperature Range | -40°C to +85°C |
| Voltage Noise Density | 17 nV/VHz |
| Total Harmonic Distortion (THD+N) | 0.25% to 0.5% |
| Input Impedance | 180 kΩ |
| Output Impedance | 75 Ω |
| Load Drive (Resistive) | 5 kΩ |
| Gain Bandwidth Product | 30 MHz |
The device requires a single +5 V operation with a range from +4.5 V to +5.5 V.
The device is available in 14-lead SOIC and P-DIP packages.
Yes, the compression ratio can be varied from 1:1 to over 15:1 relative to a user-defined rotation point.