This data sheet introduces the features of the SSM2167 low voltage microphone preamplifier, including single 3V power supply, low shutdown current, adjustable noise gate threshold, adjustable compression ratio, automatic limiting function, etc.
The SSM2167 is a single‑chip microphone conditioner that provides amplification, automatic limiting, adjustable compression ratio and a programmable noise‑gate. It operates from a 2.5 V to 5.5 V supply and consumes less than 2 µA in shutdown mode, making it suitable for battery‑powered devices.
The device is supplied in a 10‑lead MSOP (RM) package and is rated for an operating temperature range of –40 °C to +85 °C. Detailed specifications, pin configuration, typical performance curves and PCB layout recommendations are provided in the following sections.
| Supply Current | 2.3 mA – 5 mA |
|---|---|
| Input Impedance | 100 kΩ |
| Output Impedance | 145 Ω |
| THD+N | 0.2 % (20 kHz bandwidth) |
| Noise Density | 20 nV/√Hz |
| Operating Temperature Range | -40 °C to +85 °C |
The shutdown current is typically less than 2 µA.
The part is offered in a 10‑lead MSOP (RM) package.
The device is rated for –40 °C to +85 °C.