The SSM-2210 is a dual NPN matched transistor pair specifically designed for ultra-low noise audio systems. It features extremely low input base spreading resistance and high current gain, enabling outstanding signal-to-noise ratios. The device is offered in 8-pin epoxy DIP and 8-pin SO packages and is guaranteed over an industrial temperature range of -40°C to +85°C.
The document provides absolute maximum ratings, electrical characteristics at various temperatures, and typical performance characteristics including noise voltage density, gain-bandwidth product, and distortion. It also includes application circuit examples, such as a low-noise wideband amplifier using the SSM-2210 in a cascoded differential preamplifier configuration.
| Current Gain (hFE) | Typically exceeds 600 @ Ic=1 mA |
|---|---|
| Input Base Spreading Resistance (rbb') | Typically 28Ω |
| Equivalent Input Voltage Noise | Typically 0.8nV/VHz |
| Offset Voltage (Vos) | 200µV MAX |
| Offset Voltage Drift | 0.03µV/°C TYP |
| Gain-Bandwidth Product | 200MHz TYP |
| Packages | 8-Pin Plastic DIP (P) and 8-Pin SO (S) |
The equivalent input voltage noise is typically only 0.8nV/VHz over the entire audio bandwidth of 20Hz to 20KHz.
The maximum offset voltage (Vos) is 200µV.
The current gain (hFE) typically exceeds 600 at a collector current of 1 mA.