Overview
The SSM2143P, produced by Analog Devices Inc., is an integrated differential amplifier designed to receive balanced line inputs in audio applications. It is particularly suited for applications requiring a high level of immunity from common-mode noise. The device offers high common-mode rejection (CMR) and low total harmonic distortion (THD), making it ideal for professional audio systems.
Key Specifications
| Parameter | Symbol | Conditions | Min | Typ | 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 | 10 | - | 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, RTI, f = dc | 70 | 90 | - | dB |
| Input Offset Voltage | VIOS | VCM = 0 V, RTI, G = 2 | -1.2 | 0.05 | 1.2 | mV |
| Power Supply Voltage Range | VS | - | ±6 | ±18 | V | |
| Supply Current | ISY | VCM = 0 V, RL = ∞ | ±2.7 | ±4.0 | - | mA |
Key Features
- High Common-Mode Rejection (CMR): Typical 90 dB of CMR at DC, 60 Hz, and 20 kHz, ensuring high immunity from common-mode noise.
- Low Total Harmonic Distortion (THD): Less than 0.004% over the full audio band, even when driving low impedance loads.
- Fast Slew Rate: 10 V/μs, contributing to its wide bandwidth and fast response time.
- Wide Bandwidth: 7 MHz at a gain of 1/2 and 3.5 MHz at a gain of 2.
- Flexible Gain Options: Can be configured for gains of 1/2 or 2 by reversing the +IN/-IN and SENSE/REFERENCE connections.
- High Input Signal Handling: Can handle input signals as large as +28 dBu at a gain of 1/2.
- Low Cost: Offers a cost-effective solution for professional audio applications.
Applications
The SSM2143P is primarily used in professional audio systems where high-quality signal reception and noise immunity are crucial. Some specific applications include:
- Professional audio mixing consoles and soundboards.
- Audio signal processing and distribution systems.
- Long cable runs in audio installations.
- Studio and live sound equipment.
Q & A
- What is the primary function of the SSM2143P?
The SSM2143P is an integrated differential amplifier designed to receive balanced line inputs in audio applications.
- What is the typical common-mode rejection (CMR) of the SSM2143P?
The typical CMR is 90 dB at DC, 60 Hz, and 20 kHz.
- What is the total harmonic distortion (THD) of the SSM2143P?
The THD is less than 0.004% over the full audio band.
- What is the slew rate of the SSM2143P?
The slew rate is 10 V/μs.
- What are the available gain configurations for the SSM2143P?
The device can be configured for gains of 1/2 or 2 by reversing the +IN/-IN and SENSE/REFERENCE connections.
- What is the maximum input signal the SSM2143P can handle at a gain of 1/2?
The device can handle input signals as large as +28 dBu at a gain of 1/2.
- What is the bandwidth of the SSM2143P at a gain of 1/2?
The bandwidth is 7 MHz at a gain of 1/2.
- What is the power supply voltage range for the SSM2143P?
The power supply voltage range is ±6 V to ±18 V.
- What is the typical supply current of the SSM2143P?
The typical supply current is ±4.0 mA.
- In what types of applications is the SSM2143P commonly used?
The SSM2143P is commonly used in professional audio systems, audio signal processing, and long cable runs in audio installations.
