Overview
The SSM2141SZ-REEL, 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 level of noise immunity and optimum common-mode rejection, making it ideal for high-performance audio systems. The device achieves a common-mode rejection ratio (CMR) of typically 100 dB, significantly outperforming typical op-amp configurations which usually achieve only 40 dB of CMR. The SSM2141 also boasts low distortion performance, with a slew rate of 9.5 V/µs and high open-loop gain, resulting in distortion of less than 0.002% over the full audio bandwidth.
Key Specifications
| Parameter | Symbol | Conditions | Min | Max | Units | |
|---|---|---|---|---|---|---|
| Supply Voltage | Vs | ±6 | ±18 | ±18 | V | |
| Input Voltage Range | IVR | VCM = 0 V | ±10 | ±10 | V | |
| Common-Mode Rejection Ratio | CMR | VCM = ±10 V | 75 | 90 | dB | |
| Slew Rate | SR | RL = 2 kΩ | 9.5 | V/µs | ||
| Total Harmonic Distortion | THD | RL = 600 Ω | 0.01 | % | ||
| Supply Current | ISY | No Load | 2.5 | 3.5 | 4.0 | mA |
| Output Swing | VO | RL = 2 kΩ | ±13 | ±14.7 | V | |
| Capacitive Load Drive Capability | CL | No Oscillation | 300 | pF |
Key Features
- High common-mode rejection ratio (CMR) of typically 100 dB, significantly better than typical op-amp configurations.
- Low distortion performance with a slew rate of 9.5 V/µs and high open-loop gain, resulting in distortion of less than 0.002% over the full audio bandwidth.
- High power supply rejection ratio (PSRR) to minimize noise from the power supply.
- Capable of driving capacitive loads up to 300 pF without oscillation.
- Low supply current of 2.5 mA to 4.0 mA, making it energy-efficient.
- Complements the SSM2142 balanced line driver for a fully integrated solution for transformer balancing of audio signals.
Applications
- Receiving balanced line inputs in high-performance audio applications.
- Summing signals and differential preamplifiers.
- 600 Ω low distortion buffer amplifiers.
- Equivalent transformer balancing of audio signals without the problems of distortion, EMI fields, and high cost.
Q & A
- What is the typical common-mode rejection ratio (CMR) of the SSM2141?
The SSM2141 typically achieves a CMR of 100 dB.
- What is the slew rate of the SSM2141?
The slew rate of the SSM2141 is 9.5 V/µs.
- What is the total harmonic distortion (THD) of the SSM2141 at a 600 Ω load?
The THD at a 600 Ω load is 0.01%.
- What is the supply current range of the SSM2141?
The supply current ranges from 2.5 mA to 4.0 mA.
- Can the SSM2141 drive capacitive loads?
Yes, the SSM2141 can drive capacitive loads up to 300 pF without oscillation.
- What are the typical applications of the SSM2141?
Typical applications include receiving balanced line inputs in high-performance audio, summing signals, differential preamplifiers, and 600 Ω low distortion buffer amplifiers.
- How does the SSM2141 complement other components?
The SSM2141 complements the SSM2142 balanced line driver for a fully integrated solution for transformer balancing of audio signals.
- What is the maximum output swing of the SSM2141?
The maximum output swing is ±14.7 V at a 2 kΩ load.
- What is the power supply rejection ratio (PSRR) of the SSM2141?
The PSRR is 123.1 dB, indicating high immunity to power supply noise.
- What is the operating supply voltage range of the SSM2141?
The operating supply voltage range is ±6 V to ±18 V.
