Overview
The SSM2143S, produced by Analog Devices Inc., is an integrated differential amplifier designed to receive balanced line inputs in audio applications. It is renowned for its high immunity to common-mode noise, making it ideal for professional audio systems. The device offers two gain levels, G = 1/2 or G = 2, and features a high common-mode rejection ratio (CMR) of up to 90 dB, achieved through laser trimming of resistances. This amplifier is characterized by its low total harmonic distortion (THD) and high slew rate, ensuring high-quality audio signal processing.
Key Specifications
| Parameter | Symbol | Conditions | Min | Max | Units | |
|---|---|---|---|---|---|---|
| Total Harmonic Distortion Plus Noise | THD+N | VIN = 10 V rms, RL = 10 kΩ, f = 1 kHz | 0.0006% | - | - | % |
| Signal-to-Noise Ratio | SNR | 0 dBu = 0.775 V rms, 20 kHz BW, RTI | - | -107.3 dBu | - | dBu |
| Slew Rate | SR | RL = 2 kΩ, CL = 200 pF | 6 V/µs | 10 V/µs | - | V/µs |
| Small Signal Bandwidth | BW–3 dB | RL = 2 kΩ, CL = 200 pF, G = 1/2 | - | 7 MHz | - | MHz |
| Common-Mode Rejection | CMR | VCM = ±10 V, RTO f = dc | 70 dB | 90 dB | - | dB |
| Supply Voltage Range | VS | - | ±6 V | - | ±18 V | V |
| Operating Temperature | - | - | -40°C | - | 85°C | °C |
| Input Voltage Range | IVR | - | ±15 V (Common Mode) | - | ±28 V (Differential) | V |
| Output Voltage Swing | VO | RL = 2 kΩ | ±13 V | ±14 V | - | V |
Key Features
- High Common-Mode Rejection Ratio (CMR): Up to 90 dB, ensuring high immunity to common-mode noise.
- Low Total Harmonic Distortion (THD): Less than 0.004% over the full audio band.
- High Slew Rate: 10 V/µs, enabling fast signal processing.
- Wide Bandwidth: 7 MHz at G = 1/2, suitable for high-frequency audio applications.
- Dual Gain Levels: Configurable for gains of 1/2 or 2 by adjusting the input and sense connections.
- Low Input Offset Voltage: Typically 0.05 mV, ensuring minimal DC offset.
- High Power Supply Rejection Ratio (PSR): Up to 110 dB, providing stability against power supply variations.
Applications
- Professional Audio Systems: Ideal for use in mixing consoles, audio processors, and other professional audio equipment.
- Long Cable Runs: Suitable for driving audio signals over long distances without significant signal degradation.
- High-Quality Audio Equipment: Used in applications requiring low noise and high signal integrity, such as recording studios and live sound systems.
Q & A
- What is the primary function of the SSM2143S?
The SSM2143S is an integrated differential amplifier designed to receive balanced line inputs in audio applications.
- What are the available gain levels for the SSM2143S?
The SSM2143S can be configured for gains of 1/2 or 2 by adjusting the input and sense connections.
- What is the typical common-mode rejection ratio (CMR) of the SSM2143S?
The typical CMR is 90 dB.
- What is the slew rate of the SSM2143S?
The slew rate is typically 10 V/µs.
- What is the bandwidth of the SSM2143S at a gain of 1/2?
The bandwidth is typically 7 MHz at a gain of 1/2.
- What is the input voltage range for the SSM2143S?
The input voltage range is ±15 V for common mode and ±28 V for differential mode.
- What is the output voltage swing of the SSM2143S?
The output voltage swing is typically ±14 V with a 2 kΩ load.
- What is the operating temperature range of the SSM2143S?
The operating temperature range is -40°C to 85°C.
- What is the supply voltage range for the SSM2143S?
The supply voltage range is ±6 V to ±18 V.
- What is the typical supply current of the SSM2143S?
The typical supply current is 2.7 mA.
