The SSM2143P is an integrated differential amplifier from Analog Devices Inc. that is designed for use in audio applications requiring a high level of immunity from common-mode noise. It provides a typical 90 dB of common-mode rejection (CMR), which is achieved by laser trimming of resistances to better than 0.005%. The SSM2143P also has a very low total harmonic distortion (THD) of 0.0006% typ @ 1 kHz, and a fast slew rate of 10 V/μs typ. It has a wide bandwidth of 7 MHz typ (G = 1/2), and two gain levels available: G = 1/2 or 2.

The SSM2143P is a versatile amplifier that can be used in a wide variety of audio applications, including:

• Microphones: The SSM2143P is an ideal amplifier for driving microphones, as it provides excellent CMR and THD performance. It can also be used to implement balanced microphone inputs.
• Line drivers and receivers: The SSM2143P can be used to drive and receive balanced line signals. It is well-suited for use in audio consoles, mixers, and other professional audio equipment.
• Preamplifiers and power amplifiers: The SSM2143P can be used in preamplifiers and power amplifiers to provide high-quality audio amplification. It is also well-suited for use in guitar amplifiers and other musical instrument amplifiers.

The SSM2143P is a low-cost amplifier that is easy to use. It is available in an 8-pin PDIP package, and requires only a few external components to operate.

Here are some of the key features and benefits of the SSM2143P:

• High common-mode rejection (CMR): 90 dB typ
• Very low total harmonic distortion (THD): 0.0006% typ @ 1 kHz
• Fast slew rate: 10 V/μs typ
• Wide bandwidth: 7 MHz typ (G = 1/2)
• Two gain levels available: G = 1/2 or 2
• Low cost
• Easy to use

The SSM2143P is a versatile and high-quality differential amplifier that is well-suited for a wide variety of audio applications. It is a popular choice for audio engineers and hobbyists alike, and is used in a wide range of audio products, from professional audio equipment to consumer electronics.

Here are some additional details about the SSM2143P:

• The SSM2143P is a fully differential amplifier, meaning that it has two inputs and two outputs. The inputs are typically driven by a balanced signal, such as the output of a microphone or the input to a balanced line receiver. The outputs are typically connected to a balanced load, such as the input to a balanced line driver or the input to a power amplifier.
• The SSM2143P has a single gain setting, which is determined by the value of the feedback resistor. The default gain setting is G = 1/2, but it can be changed by connecting an external resistor between the feedback pin and the output pin.
• The SSM2143P has a very low input noise voltage of 1.2 nV/√Hz typ. This makes it ideal for use in applications where low noise is important, such as microphone preamps and recording equipment.
• The SSM2143P is available in both commercial and industrial temperature grades. The commercial grade is specified for operation over a temperature range of 0°C to 70°C, while the industrial grade is specified for operation over a temperature range of -40°C to 85°C.

Overall, the SSM2143P is a high-quality and versatile differential amplifier that is well-suited for a wide variety of audio applications. It is a popular choice for audio engineers and hobbyists alike, and is used in a wide range of audio products, from professional audio equipment to consumer electronics.