Overview
The SSM2142SZ, produced by Analog Devices Inc., is an integrated differential-output buffer amplifier designed to convert single-ended input signals into balanced output signal pairs. This component is crucial in maintaining the sonic quality of audio systems by eliminating power line hum, RF interference, voltage drops, and other externally generated noise. It utilizes low noise thermally matched thin film resistors and high slew rate amplifiers to achieve high output drive and low signal distortion. The SSM2142SZ is particularly useful in applications requiring stable and high-quality audio signal transmission over long cables.
Key Specifications
| Parameter | Symbol | Conditions | Min | Typ | Max | Units |
|---|---|---|---|---|---|---|
| Input Impedance | ZIN | 10 kΩ | ||||
| Input Current | IIN | |||||
| Output Voltage (RMS) | VOUT | into 600 Ω | 10 V | |||
| Distortion | 20 Hz–20 kHz, 10 V RMS into 600 Ω | 0.006% | ||||
| Slew Rate | 15 V/μs | |||||
| Gain Error (Differential or Single-Ended) | 0.7% | |||||
| Power Supply Rejection | PSR | ±1V, TA = +25°C | -80 dB | |||
| Operating Supply Voltage | VCC | ±12 V | ±15 V | ±18 V | V |
Key Features
- Transformer-like balanced output drives 10 V RMS into a 600 Ω load.
- Stable when driving large capacitive loads and long cables.
- Low distortion: 0.006% typical at 20 Hz–20 kHz, 10 V RMS into 600 Ω.
- High slew rate: 15 V/μs typical.
- Low gain error: 0.7% typical (differential or single-ended).
- Outputs are short-circuit protected.
- Available in space-saving 8-pin Mini-DIP and 16-pin SOIC packages.
- Excellent common-mode rejection and offset error reduction through laser-trimmed onboard resistors.
Applications
- Audio mix consoles.
- Distribution amplifiers.
- Graphic and parametric equalizers.
- Dynamic range processors.
- Digital effects processors.
- Telecommunications systems.
- Industrial instrumentation.
- Hi-Fi equipment.
Q & A
- What is the primary function of the SSM2142SZ?
The SSM2142SZ is an integrated differential-output buffer amplifier that converts single-ended input signals into balanced output signal pairs. - What are the key benefits of using the SSM2142SZ in audio systems?
The key benefits include high output drive, low signal distortion, and excellent rejection of common-mode noise and offset errors. - What is the typical output voltage of the SSM2142SZ?
The SSM2142SZ can drive a 10 V RMS signal into a 600 Ω load. - What is the slew rate of the SSM2142SZ?
The slew rate is 15 V/μs typical. - What types of packages are available for the SSM2142SZ?
The component is available in 8-pin Mini-DIP and 16-pin SOIC packages. - How does the SSM2142SZ handle common-mode noise?
The SSM2142SZ achieves excellent common-mode rejection through the use of laser-trimmed onboard resistors. - What are some common applications of the SSM2142SZ?
Common applications include audio mix consoles, distribution amplifiers, graphic and parametric equalizers, and Hi-Fi equipment. - Can the SSM2142SZ drive long cables?
Yes, the SSM2142SZ is stable and capable of driving difficult loads, including long cables with capacitances up to 0.16 µF. - How does the SSM2142SZ compare to transformer-based solutions?
The SSM2142SZ mimics the performance of fully balanced transformer-based solutions but with lower distortion, less board space, and a reduced parts count. - What is the recommended cable type for use with the SSM2142SZ?
Low impedance shielded audio cable, such as the standard Belden 8451, is recommended.
