The SSM2142 is an integrated differential-output buffer amplifier that converts a single-ended input signal to a balanced output signal pair with high output drive. It features transformer-like balanced output, low distortion, high slew rate, low gain error, and short-circuit protection.
The Analog Devices SSM2142 is an integrated differential-output buffer amplifier that converts a single-ended input signal to a balanced output signal pair. It utilizes low noise thermally matched thin film resistors and high slew rate amplifiers to maintain sonic quality in audio systems by eliminating power line hum, RF interference, and voltage drops commonly encountered with long cable runs.
The device mimics the performance of fully balanced transformer-based solutions for line driving while occupying less board space and achieving comparable common-mode rejection. It is capable of driving difficult loads, including those as low as 600 Ω, yielding low distortion performance despite extremely long cables.
| Output Drive Capability | 10 V RMS into a 600 Ω Load |
|---|---|
| Total Harmonic Distortion Plus Noise (THD+N) | 0.006% typ |
| Slew Rate | 15 V/µs typ |
| Gain Error (Differential) | 0.7% typ |
| Input Impedance | 10 kΩ |
| Supply Current (Unloaded) | 5.5 mA typ |
| Operating Temperature Range | -40°C to +85°C |
The SSM2142 is designed for use in audio mix consoles, distribution amplifiers, graphic and parametric equalizers, dynamic range processors, digital effects processors, telecommunications systems, industrial instrumentation, Hi-Fi equipment, and as a balanced line driver.
Yes, the device is designed to be stable when driving large capacitive loads and long cables without requiring snubber networks or series load resistors.
The SSM2142 is available in an 8-Pin Plastic DIP (SSM2142P) and a 16-Pin Wide Body SOIC (SSM2142S8).